Sound Effects Generator 2

This circuit uses the Holtek HT2884 IC to produce 8 different sound effects. All sound effects are generated internally by the HT2884 IC. Power is a 3 Volt battery, but the IC will work with any voltage between 2.5 and 5 Volts. Switch S1 is the on / off switch.

Sound Effects Generator 2 Circuit Diagram:

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. There are 2 lazer guns, 1 dual tone horn sound, 2 bomb sounds, 2 machine gun sounds and a rifle shot sound. Standby current is about 1 uA at 3 Volt, so battery life is very economical.

The IC may be obtained from Maplin Electronics order code AZ52G

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2 X 30Watt home amplifier circuit

Audio amplifier circuit is very suitable for use at home, using a subwoofer speaker, or woofer speaker. Usually, also called home amplifier, audio amplifiers are based on the IC and ic are used still in series with type STK457 STK and besides it also can use the STK459, 460, 461, 463, 465. And each ic has the quality of each one, please look at alldatasheet.com.

Part List :

R1 = 22K

R2 = 22K

R3 = 330R

R4 = 33K

R5 = 1K

R6 = 1K

R7 = 4.7R

R8 = 3K3

R9 = 3K3

R10 = 4.7R

R11 = 100R

R12 = 33K

R13 = 330R

C1 = 0.1uF

C2 = 0.1uF

C3 = 100uF

C4 = 100uF
C5 = 0.1uF

C6 = 47uF

C7 = 47uF
C8 = 0.1uF

C9 = 100uF

C10 = 100uF

U1 = STK457,STK459, 460, 461, 463, 465.

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1 3 12 2 VDC Variable Power Supply

Power supply circuit to generate output below were variations between 1.3V DC to 12.2V DC with 1A current.

In addition, the power supply circuit is also equipped with over-current protection or shield against belebih flow. Power supply circuit is very simple, but the quality is quite good, made ​​her basiccally regulator IC LM723 is a fairly legendary.

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