Stepper Motor Controller using IC 4027

The stepper controller circuit is very interesting, since most lines the step motor controllers are very expensive. The circuit is made ​​of standard components and can easily be adjusted by a computer. If you cheap surplus transistors and stepper motors, the price of the circuit can be less than $ 15.

Stepper Motor Controller Circuit using IC 4027

This stepper controller circuit shown here can used to control the unipolar stepper motor, the which has four coils. The stepper controller circuit can drive for a motor current of up to about 500 MAMP / Winding by Suitable heat sinks for the SL-100 In higher currents seem 2N3055 power transistors can be used as darlington pair along with the SL-100. All diodes are used to protect the transistor from back current transients.

List Componet

R1, R2 ,R3, R4: 1K 1/4W Resistor
D1, D2, D3, D4: 1N4002 Silicon Diode
Q1, Q2, Q3, Q4: TIP31 NPN Transistor (See Notes) TIP41, 2N3055
U1            : 4070 CMOS XOR
U2            : 4027 CMOS JK Flip-Flop
S1            : SPDT Switch

Notes: 
1. You should be able to substitute any standard (2N3055, etc.) power transistor for Q1-Q4.
2. Every time the STEP line is pulsed, the motor moves one step.
3. S1 changes the motors direction.

4027 CMOS JK Flip-Flop IC  Pinout

4070 CMOS XOR IC Pinout

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DC Motor Controller Circuit Using 741 Op-Amp

This DC motor controller circuit using a 741 operational amplifier operating as a voltage follower where its non inverting input is connected to the speed and rotation direction of a potentiometer VR1. When VR1 is at mid position, the op-amp output is near zero and both Q1 and Q2 is OFF.

When VR1 is turned towards the positive supply side, the output will go positive voltage and Q1 will supply the current to the motor and Q2 will be OFF. When VR1 is turned to the negative supply side, the op-amp output switches to the negative voltage and Q1 will turn OFF and Q2 ON which reverses the rotation of the motor's direction.

Skema Rangkaian DC Motor Controller Using 741 Op-Amp

741 Op-Amp Pinout

As the potentiometer VR1 is moved toward either end, the speed increases in whichever direction it is turning. The TIP3055 Q1 NPN power transistor has a collector current specs of 15A and VCE0 of 60V DC. The MJE34 Q2 PNP power transistor has a collector current specs of 10A and VCE0 of 40V DC.

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Darlington Pair to Drive DC motor Circuit

A normal variable resistor cannot directly control the speed of a motor since motors draw large amounts of current which would burn out the potentiometer. Instead, the small amount of current that the potentiometer can pass can be amplified into order to run the motor. This amplification can be achieved using Darlington Pair of transistors.

Darlington Pair to Drive DC motor Circuit

Pin-out BFY61 & TIP31C Transistor

The circuit above shows a linear potentiometer connected Between Vs and 0V Such That the voltage at its wiper terminal will of always be somewhere at or Between these two voltages. The small amount of current flowing out of the potentiometer's wiper is amplified by two transistors, connected together in a configuration known as a 'Darlington pair'. The current from the potentiometer is amplified by the first transistor, and then again by the second transistor, greatly Increasing the amount of current That cans be controlled by the potentiometer.

There are, however, a couple of disadvantages of this simple circuit. Firstly, about 0.7V is lost in EACH of the transistor, so the maximum voltage cans That ever be applied to the motor is Vs - 1.4V. Secondly, the transistors are not absolutely linear so the change in motor speed for a given rotation of the potentiometer will from some more subtle in the middle of its range. Because a motor is an inductive load, it will from Produce a 'back-emf' Could the which damage to the second transistor. The 1N4148 signal diode prevents this damage by shorting out the back-emf.

The power supply for this circuit should preferably be un-smoothed (i.e. directly from the power supply rectifier). This helps prevent the motor 'sticking' at low speeds. With the TIP31C transistor given, the maximum power supply voltage may be 60V and the maximum motor current consumption may be 3A.

Source: www.eleinmec.com

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Simple Switch On Time Delay Circuit

This Switch On Time Delay circuit has been designed to create a lamp switch operated electronically with an option of setting a delay in the time of execution of operation to reduce one or more lamps in a stairwell or any other places where this circuit may be useful. The circuit can be useful to control various lamp or appliances that can be connected in relay contacts.

Simple Switch On Time Delay Circuit

The circuit that takes advantage of the emitter/base breakdown voltage of an ordinary bi-polar transistor. The reverse connected emitter/base junction of a 2N3904 transistor is used as an 8 volt zener diode which creates a higher turn-on voltage for the Darlington connected transistor pair. Most any bi-polar transistor may be used, but the zener voltage will vary from about 6 to 9 volts depending on the particular transistor used. Time delay is roughly 7 seconds using a 47K resistor and 100uF capacitor and can be reduced by reducing the R or C values. Longer delays can be obtained with a larger capacitor, the timing resistor probably shouldn't be increased past 47K. This Switch On Time Delay circuit should work with most any 12 volt DC relay that has a coil resistance of 75 ohms or more. The 10K resistor connected across the supply provides a discharge path for the capacitor when power is turned off and is not needed if the power supply already has a bleeder resistor.

Sumber: http://www.bowdenshobbycircuits.info

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9 Second Countdown Power-On Relay With 7 segment Display

9 Second Countdown Power-On Relay Circuit

This circuit provides a 9 second delay using a 7 segment display. When the switch is closed, the CD4010 up/down counter is preset to 9 and the 555 timer is disabled with the output held high. When the switch is opened, the timer produces an approximate 1 second clock signal, decrementing the counter until the 0 count is reached. When the zero count is reached, the 'carry out' signal at pin 7 of the counter moves low, energizing the 12 volt relay and stopping the clock with a low signal on the reset line (pin 4). The relay will remain energized until the switch is again closed, resetting the counter to 9. The 1 second clock signal from the 555 timer can be adjusted slightly longer or shorter by increasing or decreasing the resistor value at pin 3 of the timer.

Note:

• The circuit can be powered from a 9V PP3 battery or 12V DC power supply.
• The time delay can be varied by replace the resistor value at pin 3 IC555.
• The push button switch is for starting the timer.
• The appliance can be connected via contacts relay.

Source: bowdenshobbycircuits.info

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220V AC Operated Christmas Light Star Circuit

Here is a simple circuit of Christmas light star that can be easily constructed even by a novice. The main advantage of this circuit is that it doesn’t require any step-down transformer or ICs.

Circuit of 220V AC Operated Christmas Light Star

Components like resistors R1 and R2, capacitors C1, C2, and C3, diodes D1 and D2, and zener ZD1 are used to develop a fairly steady 5V DC supply voltage that provides the required current to operate the multivibrator circuit and trigger triac BT136 via LED1. The multivibrator circuit is constructed using two BC548 transistors (T1 and T2) and some passive components. The frequency of the multivibrator circuit is controlled by capacitors C4 and C5 and resistors R3 through R7. The output of the multivibrator circuit is connected to transistor T3, which, in turn, drives the triac via LED1. During positive half cycles of the multivibrator’s output, transistor T3 energises triac BT136 and the lamp glows. This circuit is estimated to cost Rs 75.

Note:
This circuit directly connected to the netting of electricity, voltage 220V electricity it could sting you. Avoid working in damp and directly with ground

Circuit Design By: PRINCE PHILLIPS
Source: www.electronicsforu.com

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Rangkaian On/Off 24 Hours Timer

This is a circuits are multi-range timers offering periods of up to 24 hours and beyond. This circuit can be used as repeating timers - or as single-shot timers

Skema Rangkaian On/Off 24 Hours Timer

The Cmos 4060 is a 14-bit binary counter. However - only ten of those bits are connected to output pins. The 4060 also has two inverters - connected in series across pins 11, 10 & 9. Together with R3, R4, R5 and C3 - they form a simple oscillator.

While the oscillator is running - the 14-bit counter counts the number of oscillations - and the state of the count is reflected in the output pins. By adjusting R4 you can alter the frequency of the oscillator. So you can control the speed at which the count progresses. In other words - you can decide how long it will take for any given output pin to go high.

When that pin goes high - it switches the transistor - and the transistor in turn operates the relay. In single-shot mode - the output pin does a second job. It uses D1 to disable the oscillator - so the count stops with the output pin high.

If you want to use the timer in repeating mode - simply leave out D1. The count will carry on indefinitely. And the output pin will continue to switch the transistor on and off - at the same regular time intervals.

Note:

• Using "Trial and Error" to set a long time period would be very tedious. A better solution is to use the Setup tables provided - and calculate the time required for Pin 7 to go high. For example, if you want a period of 9 Hours - the Range table shows that you can use the output at Pin 2. You need Pin 2 to go high after 9 x 60 x 60 = 32 400 seconds. The Setup table tells you to divide this by 512 - giving about 63 seconds. Adjust R4 so that the Yellow LED lights 63 seconds after power is applied. This will give an output at Pin 2 after about 9 Hours.
• Ideally C3 should be non-polarized - but a regular electrolytic will work - provided it doesn't leak too badly in the reverse direction. Alternatively - you can simulate a non-polarized 10uF capacitor by connecting two 22uF capacitors back to back
• The timers were designed for a 12-volt supply. However - provided a suitable relay is used - both circuits will work at anything from 5 to 15-volts. Applying power starts the timer. And it can be reset at any time by a brief interruption of the power supply.

Sorcer: http://www.zen22142.zen.co.uk/

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220 Volt Disco Lamp circuit

This disco lamp circuit is not a voice operated switch (VOX) because this circuit is too dumb to differentiate between musical sound or human voice. This is rather a sound activated than voice activated. One interesting application is to control your disco lighting automatically by the musical sound from high power amplifier, when the music signal is dominating the sound space. The disco lamp circuit schematic diagram is shown below.

You can use either moving coil microphone or condenser microphone for this circuit. Make sure the electrolytic capacitor is rated for 16 volt or more. The potentiometer shown in the schematic diagram is used to adjust the gain of the pre-amplification. You can adjust this potentiometer to get a proper sound level where the relay would be activated.

List Componet Of Disco Lamp circuit

• R1 : 22k 1/4 watt resistor
• R2 : 4K7 watt resistor
• R3 : 2K2 watt resistor
• R4,R8 : 10K watt resistor
• R5 : 33K watt resistor
• R6 : 56K watt resistor
• R7 : 1M watt resistor
• Potensio: 50K
• C1 : 470uf/35V electrolytic capacitor
• C2 : 22n ceramic capacitor
• C3 : 100n ceramic capacitor
• C4 : 1Uf/50V electrolyticcapacitor
• D1 - D5 : 1N4007
• D6 : Zener 5.1v
• D7 : 1N4148
• IC : CD 4069
• SCR : FIR 3D
• Mic : Mic Condensor

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Rangkaian 220V Lamp Flasher

The 220V Lamp Flasher circuit basically is a line powered flasher which can be used in many applications such as the Chritmas lamp. Below is the circuit schematic diagram

Skema Rangkaian 220V Lamp Flasher

Note:

• Input supply - 6 ~ 12 VDC
• Output - upto 200 W lamp / bulb load
• Optically isolated Mains supply
• Onboard preset to adjust the frequency (speed) of flashing (1 Hz to 5 Hz)
• Power Battery Terminal (PBT) for easy input 230 VAC mains and load connection
• Terminal pins for connecting DC power supply
• Four mounting holes of 3.2 mm each
• List Componet of 220V Lamp Flasher circuit

• CN1: 6 V to 12 VDC voltage source
• C1: 10uF/25V capacitor elektrolit
• C2: 0.22uF/275V capacitor elektrolit
• C3: 47uF/25V capacitor elektrolit
• C4: 0.1uF/25V capacitor elektrolit
• D1: LED
• D2, D3: 1N4148 Dioda
• PR1: 100K Variable resistor
• PR2: 50K Variable resistor
• Q1: TIC226 Triac
• R1: 2k2 resistor 1/2 watt
• R2, R5: 1K resistor 1/2 watt
• R3: 180E resistor 1/2 watt
• R4: 680E resistor 1/2 watt
• U1: LM555 IC timer
• U2: MOC3021
• V1: 230V AC input
• Z1: 100W Load

Dangerous...!!
This circuit directly connected to the netting of electricity, voltage 220V electricity it could sting you. Avoid working in damp and directly with ground

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Rangkaian Radar Pompa Air (Kontrol Ketinggian Air)

Radar Pompa Air (Kontrol Ketinggian Air)

By means of a Relay, employed to drive a water pump, this circuit provides automatic level control of a water reservoir or well.

Skema Rangkaian Radar Pompa air

Note:

• The two steel rods must be supported by a small insulated (wooden or plastic) board.
• The circuit can be used also with non-metal tanks, provided a third steel rod having about the same height of the tank will be added and connected to the circuit's negative ground.

The shorter steel rod is the "water high" sensor, whereas the longer is the "water low" sensor. When the water level is below both sensors, IC1C output (pin #10) is low; if the water becomes in contact with the longer sensor the output remains low until the shorter sensor is reached. At this point IC1C output goes high, Q1 conducts, the Relay is energized and the pump starts operating.

Now, the water level begins to decrease and the shorter sensor will be no longer in contact with the water, but IC1C output will be hold high by the signal return to pin #5 of IC1B, so the pump will continue its operation. But when the water level falls below the longer sensor, IC1C output goes low and the pump will stop.

SW1 is optional and was added to provide reverse operation. Switching SW1 in order to connect R3 to pin #11 of IC1D, the pump will operate when the reservoir is nearly empty and will stop when the reservoir is full. In this case, the pump will be used to fill the reservoir and not to empty it as in the default operating mode.

List Component

• R1,R2: 15K 1/4W Resistors
• R3: 10K 1/4W Resistor
• R4: 1K 1/4W Resistor
• D1: LED
• D2: 1N4148 Diode
• IC1: 4001
• Q1: BC337 NPN Transistor
• SW1: witch
• RL1: Relay with SPDT 2A @ 230V switch, Coil Voltage 12V

source

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Rangkaian Audio Channel Selector Stereo

Audio Channel Selector

This circuit serves for connecting the stereo outputs from Four Different channels as inputs and only one of Them is selected to the output at any one time.

When the circuit switch on, channel A (AR and AL) is selected. If no audio is present in channel A, the circuit Waits for Some time and then Selects the next channel (channel B). This search operation continues Until it detects an audio signal in one of the channels. The inter-channel delay time or the wait Can be adjusted with the help of preset VR1. If still longer time is needed, May replace one capacitor C1 with of higher value.

To manually skip over from one active channel to another active channel, simply push the skip switch (S1), until the desired channel input gets selected. The selected channel (A, B, C, or D) is indicated by the glowing of corresponding LED (LED11, 12, 13, or 14 ).

Skema rangkaian audio channel selector stereo

IC CD4066 contains 4 analog switches, These switches are connected to four separate channels. These analogue switches are controlled by IC CD4017 outputs. CD4017 is a 10-bit ring counter IC. Since only one of its outputs is high at any instant, only one switch will be closed at a time. IC CD4017 is configured as a 4-bit ring counter by connecting the fifth output Q4 (pin 10) to the reset pin. Capacitor C5 in conjunction with resistor R6 forms a power-on-reset circuit for IC2, so that on initial switching on of the power supply, output Q0 (pin 3) is always high . The clock signal to CD4017 is provided by IC1 NE555 which acts as an astable multivibrator when transistor T1 is in cut- off state.

IC5 KA2281 is used here for not only indicating the audio levels of the selected stereo channel, but also for forward biasing transistor T1. As soon as a specific threshold audio level is detected in a selected channel, pin 7 and/or pin 10 of IC5 goes low . This low level is coupled to the base of transistor T1, through diode-resistor combination of D2-R1/D3-R22. As a result, transistor T1 conducts and causes output of IC1 to remain low as long as the selected channel output exceeds the preset audio threshold level.

Presets VR2 and VR3 have been included for adjustment of individual audio threshold levels of left and right stereo channels, as desired. Once the multivibrator action of IC1 is disabled, output of IC2 does not change further. Hence, searching through the channels continues until it receives an audio signal exceeding the preset threshold value. The skip switch S1 is used to skip a channel even if audio is present in the selected channel. The number of channels can be easily extended up to ten, by using additional 4066 ICs.

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Rangkaian Kontrol Kecepatan Wiper Mobil

Pengontrol Kecepatan Wiper

For some car wiper speed sometimes just made some speed so that less appropriate when we want a different speed, but for those of you who want a digital wiper speed controller you can also use this circuit to replace your old system.

Skema rangkaian kontrol kecepatan wiper mobil

This circuit comprises 2 timer NE555 ICs, one CD4017 decade counter, one TIP32 driver transistor, a 2N3055/ TIP3055 power transistor and A Few other discrete components. Timer IC1 is configured as a mono-stable multivibrator produces a pulse Pls Which one presses switch S1 momentarily. This pulse acts as a clock pulse for the decade counter (IC2) Which advances by one count on Each successive clock pulse or the push of switch S1. Ten presets (VR1 through VR10), for Different sets of values by trial and error, Are Used At The ten outputs of IC2. But since only one output of IC2 is high at a time, only one preset (selected at the output) effectively comes in series with resistors R4 and R5 timing connected in the circuit of timer IC3 Which functions in astable mode. As presets VR1 through VR10 are set for Different values, Different time periods (or frequencies) for astable multivibrator IC3 Can be selected. The output of IC3 is applied to the pnp driver transistor TIP32 for driving the final power transistor 2N3055 Which in turn drives the wiper motor at the selected sweep speed. The power supply for the wiper motor as well as the circuit is tapped from the vehicle s battery Itself. The duration of the monostable multivibrator IC1 is set for a period of nearly one second.

Source : www.electronic-circuits-diagrams.com

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Rangkaian Line Follower ROBOT Berbasis AT89C2051

This Circuit of Line Follower ROBOT has been getting from VingPeaw Competition Award winner in 2543, the robot built with mikrokontroler AT89C2051, L293D, and four IR sensors. Simple circuit and platform, quick tracking and easy-understand program using C language.

The Line Follower ROBOT designed which use two motors control rear wheels and the single front wheel is free. It has 4-infrared sensors on the bottom for detect black tracking tape, when the sensors detected black color, output of comparator, LM324 is low logic and the other the output is high.

Prototipe Line Follower ROBOT

Microcontroller AT89C2051 and H-Bridge driver L293D were used to control direction and speed of motor.

Position of sensors the robot, left hand side is side view and right hand side is top view

Skema rangkaian Infrared sensors and comparators

Software/program

Software for write to AT89C2051 is robot1.hex ,which was written by C-language ,the source code is robot1.c compiled by using MC51 in TINY model with my start up code robot.asm .

Source: http://www.kmitl.ac.th

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Rangkaian Control DC Fan Menggunakan Remote TV

Control DC Fan Menggunakan Remote TV

This circuit measures temperature in Celsius and displays it on an alphanumeric LCD. When temperature rise to 40C an alarm is activated and the electromechanical relay is also activated which drives a fan to keep the temperature at a level. Another feature of this circuit is that you can use the keys "1,2,3,4" of a Philips TV IR remote to turn on or off three relays. Key '4' is used to turn on or off the buzzer alarm.

Skema Rangkaian Control DC Fan Menggunakan Remote TV

The MCU is the ATMEL AT89C51. The LM35 is an TO-92 package temperature sensor. It senses heat from 0C to 100C. The output provides 10mV/C. We use the simple analog to digital converter, ADC0804 to convert the analog signal to digital data. The 8-bit digital data is tied to PORT1. This data is processed by microcontroller and the temperature is displayed on lcd connected to PORT2. The control pins of lcd are connected to PORT0. Some bits of the PORT0 also control the relays and buzzer. The ULN2003 chip is used to drive the relays. Pin 1 to 7 are the inputs and 10 to 16 are respective outputs. Pin 8 is ground and pin 9 is connected to the output of 7808 voltage regulator. The 7805 voltage regulator drives rest of the circuit. I used a standard buzzer driven by LM555 timer/oscillator chip. The 555 circuit is a multivibrator having output for driving the buzzer. We may use any IR receiver module and connect the output to pin 10 of microcontroller. The relay connected to pin 13 of ULN2003 turns on when temperature rises above 40C.

You may download all files in zip format. The file contains the images of completed project, hex file, circuit diagram and pcb file.

Source

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Rangkaian Dimmer (Pengatur Contras Lampu 220V)

Dimmers circuit useful to control the lighting of a lamp level (brightness control) by regulating voltage Vrms (root mean square voltage). Most Interior or Lighting Design Consultant must include dimmers on each of their design, because their system with dimmers can regulate mood and color of a room with more perfect.

Skema Rangkaian Dimmer (Pengatur Contras Lampu 220V)

dimmer circuit graph

This circuit is typical of a high-end leading-edge dimmers. C1 and L1 are for RF interference suppression. The circuit operates by utilising the phase shift created by VR1, C2, R1 and C3. This network delays the signal applied to DB1 (a bidirectional breakdown diode called a DIAC). When the voltage exceeds the 30V (typical) breakdown voltage of the DIAC, it Conducts fully and the charge in C3 is used to trigger the TRIAC. Once triggered, the triac will conduct fully until the current falls to near zero, at which time it turns off again. This process is repeated for every half-cycle of the mains voltage. The delay, turn-on and turn-off points are visible and indicated in the graph above.

Leading edge dimmers must never be used with a capacitive load (most electronic ballast circuits), because the very fast rise time of the voltage causes extremely high instantaneous current flow into the capacitor. Inductive loads (such as conventional iron-core transformers) are quite safe, since the inductance limits the rise time of the current to safe values.

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Rangkaian Senapan|Pistol Elektromagnetik

Senapan|pistol elektromagnetik

This is a miniature magnetic gun. when sakla 1 in press, it will propel a small slug about 1.5 meters high, 2.5 meters or horizontally. IC 555 is a timer in astable mode, sending approx. 10 ms pulses to decade counter IC2. IC2 is continually reset through R3, until pin 15 is taken low through the "Fire" button. IC2 then sequences through outputs Q1 to Q7, to feed power transistors TR1 to TR4, which fire electromagnets L1 to L4 in rapid sequence.

T1 is trafo step down 18 volts 1 amp A.C. When Rectified and smoothed, this provides 25.2 V DC for electromagnets L1 to L4. Resistors R4 drops 12 V to obtain a supply voltage low enough for IC1 and IC2.

Skema rangkaian senapan|pistol elektromagnetik

The electromagnets are wound on a 25 cm long, 3 mm dia. copper tube (available at hobby shops). Two "stops" may be cut from tin for each electromagnet, and 500 turns of approx. 30 SWG. enamelled copper wire wound between them. The electromagnets should be wound on a base of sellotape reversed, so that one may slide them on the copper tube. The slug (or "bullet") is a 3 cm long piece of 2 mm dia. galvanized wire, which should slide loosely inside the copper tube.

Most Crucial to the effectiveness of the gun are the setting of VR1 and the positions of electromagnets L1 to L4 on the copper tube (the values and measurements shown are merely a guide). Firstly, with L2 to L4 disconnected, VR1 should be tuned and L1 positioned for optimum effectiveness (place a wire inside the tube to feel how far the slug jumps with L1). Then L2 (now connected) should be positioned for optimum effectiveness (the slug will now exit the tube). Repeat with L3 and L4.

Electromagnets L2 to L4 were each found to substantially increase the range of the gun. In a forthcoming edition of SPE, the author will describe how readers may land a small projectile on Mars.

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Rangkaian Driver (Penggerak) PlayBack TV

Driver (Penggerak) PlayBack TV

This is an efficient flyback driver for modern cylindrical rectified television flybacks. Frequency range can be increased using multiposition switch for other values of C3 capacitor, for example 2 nF for 80KHz-200000KHz, but didn't found flybacks with so high resonant frequencies, in addition with higher values of c3 , eg 200nF, 2uF the frequency will drop making possible the use of ignition coils, and rectified power transformers @50Hz to charge high voltage electrolitic caps at 300-400V).

Skema rangkaian driver (penggerak) playback TV

The 555 is wired as an astable and the capacitor is charged only through the 4,7Kohm trimmer (notice the diode) and discharged only through the 2.2 Kohm trimmer, making the duty cycle full adjustable. The square wave is then feed in a totem pole made up of a 2N3904 and a 2N3906, which are cheap, and easy to find. The totem pole ensures the gate being charged and discharged very fast (approx 50nS). The IRF840 is a cheap reliable and powerful power mosfet, it has current capability of 8 A continuous and 32A pulse, 800V drain source voltage, protecting internal zener diode. There is a snubbing network to ensure that voltage spikes are kept low (unless the insulation of the transformer start to leak) protecting both transistors and 555 IC. 100 ohm is a compromise between decay time and voltage spike.

Note:
The flyback driven in this way can supply a significant current, aldough the heart fibrillation starts at 30mA I recommend caution to avoid painful arc-burns. The arc is a hot plasma, never operate the circuit in presence of flammable substances. Charging high voltage capacitors is a serious life threat, so if you arent unexperienced just draw arcs and no more This device when rectified generates static voltage that can be a little annoying

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Rangkaian Kontrol Motor DC Sederhana

Kontrol Motor DC Sederhana

The following is a circuit that can be used to control the dc motor rotation direction. S1 and S2 are normally open, push to close, press button switches. The diodes can be red or green and are there only to indicate direction. You may need to alter the TIP31 transistors depending on the motor being used. Remember, running under load Draws more current.

Skema Rangkaian Kontrol Motor DC Sederhana

This circuit was built to operate a small motor used for opening and closing a pair of curtains. As an advantage over automatic closing and opening systems, you have control of how much, or how little light to let into a room. The four diodes surriunding the motor, are back EMF diodes. They are chosen to suit the motor. For a 12V motor drawing 1amp under load, I use 1N4001 diodes.

Absolute Maximum Ratings Transistor TIP31

VCBO Collector-Base Voltage :
TIP31 40V
TIP31A 60V
TIP31B 80V
TIP31C 100V

Collector-Emitter Voltage :
TIP31 40V
TIP31A 60V
TIP31B 80V
TIP31C 100V

Emitter-Base Voltage 5 V
Collector Current (DC) 3 A
Collector Current (Pulse) 5 A
Base Current 1 A
Collector Dissipation (TC=25 C) 40 W
Collector Dissipation (Ta=25 C) 2 W
Junction Temperature 150 C
Storage Temperature - 65 ~ 150 C

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Rangkaian Control Motor Stepper

Rangkaian Control Motor Stepper

The circuit is very simple and inexpensive. This is good thing because most commercial stepper motor controller ICs are quite expensive. This circuit is built from standard components and can easily be adapted to be controlled by a computer. If you use cheap surplus transistors and stepper motor, the price of the circuit can be kept to under $10.

Skema Rangkaian Control Motor Stepper

Note:
You should be able to substitute any standard (2N3055, etc.) power transistor for Q1-Q4.
Every time the STEP line is pulsed, the motor moves one step.
S1 changes the motors direction.

List Componet
R1, R2 ,R3, R4_____ 1K 1/4W Resistor
D1, D2, D3, D4_____ 1N4002 Silicon Diode
Q1, Q2, Q3, Q4_____TIP31 NPN Transistor (See Notes) TIP41, 2N3055
U1_____________4070 CMOS XOR Integrated Circuit
U2_____________ 4027 CMOS Flip-Flop
S1_____________ SPDT Switch
MISC 1 Case, Board, Wire, Stepper Motor


Pin & feature IC 4070 CMOS XOR I

Wide supply voltage range: 3.0V to 15V
High noise immunity: 0.45 VDD (typ.)
Low power TTL compatibility: Fan out of 2 driving 74L or 1 driving 74LS
Low power: 50 nW (typ.)
Medium speed operation: 12 MHz (typ.) with 10V supply



Pin & feature 4070 CMOS XOR

Wide supply voltage range 3.0V to 15V
High noise immunity 0.45 VDD typ.
Low power TTL Fan out of 2 driving 74L compatibility or 1 driving 74LS

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Control Kecapatan Fan-Metode PWM

The following circuit is a circuit that is used to adjust the fan speed by using the PWM (Pulse Width Modulation). This circuit is very easy to make, and do not use the microcontroller or other digital components, for more details, let's look at his series of pictures below

Skema Rangkain Control Kecapatan Fan-Metode PWM

VR1: 10K Potentiometer Function as the motor speed control.

R9: Resistor as a determinant of minimum speed. Diseri with 10K VR, R1 for 1K will provide the settings range from 0 - 100% better used if the load used is a motor or a lamp. If R1 for 10K, will provide the range 5V - 12V is suitable if the load used is the cooling fan.

Q1: For 600mA maximum load, we recommend using the 2N2222A transistors packed in a metal body (TO-18). To load up to 5A please try using a transistor TIP120, 121 or 122.

D1: Diode is used to prevent back-emf which usually occurs in the load inductor such as Fan or Motor. Back-emf can damage the transistor!

Lay out PCD pic

Finished Rangkaian Control Kecapatan Fan

Description IC The LM124 Low Power Quad Operational Amplifier

The LM124 series consists of four independent, high gain, internally frequency compensated operational amplifiers which were designed specifically to operate from a single power supply over a wide range of voltages. Operation from split power supplies is also possible and the low power supply current drain is independent of the magnitude of the power supply voltage.

Application areas include transducer amplifiers, DC gain blocks and all the conventional op amp circuits which now can be more easily implemented in single power supply systems. For example, the LM124 series can be directly operated off of the standard +5V power supply voltage which is used in digital systems and will easily provide the required interface electronics without requiring the additional ±15V power supplies.

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