This is a sound effects generator circuit used IC HT2884. There are 8 different sound effect can be produced that are 2 lazer guns, 1 dual tone horn sound, 2 bomb sounds, 2 machine gun sounds and a rifle shot sound.
Power is a 3 Volt battery, but the IC will work with any voltage between 2.5 - 5 Volts. Switch S1 is the on / off switch. The output at pin 10 is amplified and drives a small 8 ohm loudspeaker. Pressing S3 once will generate all the sounds, one after another. S2 can be used to produce a single sound effect, next depression gives the next sound effect. Standby current is about 1 uA at 3 Volt, so battery life is very economical.
IC HT2844 Description
The IC HT2844 is a CMOS LSI chip designed for use in sound effect products. It is equipped with tone circuit, noise circuit, and other control logic to generate various sounds including rifle gun, machine gan, booming, door bell, alarm, and so forth. the feature of the customer's sound source can be analyzed and programmed into an internal ROM by changing a mask layer durimg device fabrication
Absolute maximum rating
Supply voltage....................................... 03 to 5 Volt.
Input voltage.......................................... Vss - 0.3 to VDD+0.3 Volt.
Storage temperature.............................. -50 to 125 C.
Operating temperature........................... 0 to 70 C.
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