Archive for category: Audio and Amplifier

Cuckoo sound Generator Circuit

Audio and Amplifier | By: Diagram mania

Agreeable, very close sound imitation Suitable for sound effects, door-bells etc. Circuit diagram Parts: R1,R5 1K 1/4W Resistors R2 50K 1/2W Trimmer Cermet R3 8K2 1/4W Resistor R4 82K 1/4W Resistor R6 1M 1/4W Resistor R7,R17,R20,R21 22K 1/4W Resistors R8,R10,R11,R19 10K 1/4W Resistors R9 150K 1/4W Resistor R12 4K7 1/4W Resistor R13 100K 1/4W Resistor […]

2N3055 Power Amplifier Circuit

Audio and Amplifier | By: Diagram mania

Simple and low cost. The optimal supply voltage is around 50V, but this amp work from 30 to 60V. The maximal input voltage is around 0.8 – 1V. As you can see, in this design the components have a big tolerance, so you can build it almost of the components, which you find at home. […]

Sound Operated Switch Circuit

Audio and Amplifier | By: Diagram mania

Circuit diagram Notes: This sensitive sound operated switch can be used with a dynamic microphone insert as above, or be used with an electret (ECM) microphone. If an ECM is used then R1 (shown dotted) will need to be included. A suitable value would be between 2.2k and 10kohms. The two BC109C transitors form an […]

Sound Effects Generator 2 Circuit

Audio and Amplifier | By: Diagram mania

Description: This circuit uses the Holtek HT2884 IC to produce 8 different sound effects. Circuit diagram Notes: 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. The […]

Simple Amplifier by Transistor AC128

Audio and Amplifier | By: Diagram mania

I find this in my old circuit electronics book. It is very a small power amplifier, but good quality audio class AB amplifier in hi-fi applications. The component capable of delivering 2W continuously an used the AC128 thansistor into a 8 ohm load and 5W peak. with the proper 9 volt unregulated power supply.

Sound SCR Switch by IC 1458 & SCR C106D

Audio and Amplifier | By: Diagram mania

This is Electronic Switch, Control by Sound. It is mini Circuit and easy, use IC 1458 or 4558 or LF353 , SCR for Switch Electronic = Relay Switch. Volt supply 9V. Circuit Sound SCR Switch by IC 1458 & SCR C106D PCB Sound SCR Switch by IC 1458 & SCR C106D Source: PK Kit Circuit

8 watt audio amplifier

Audio and Amplifier | By: Diagram mania

The LM383 is a cost effective, high power amplifier suited for automotive applications. High current capability (3.5A) enables the device to drive low impedance loads with low distortion. The LM383 is current limited and thermally protected. High voltage protection is available (LM383A) which enables the amplifier to withstand 40V transients on its supply. The LM383 […]

Small stereo amplifier for computer with TDA7025

Audio and Amplifier | By: Diagram mania

Small stereo amplifier,low power, less devices, IC TDA7025 is the main equipment. Operation of the circuit, the signal split into left and right through the capacitor coupling of C1, C2 is a variable resistor VR1 adjusts the strength of the input signals to bridge amplifiers power suppliers IC1-. IC2, serves to amplify the signal up, […]

Logarithmic Amplifier LM11C circuit diagram

Audio and Amplifier | By: Diagram mania

This is a logarithmic amplifier circuit based on National operational amplifier LM11C. Unusual frequency compensation provides this logarithmic converter a 100 µs time continual from 1 mA down to 100 µA, escalating from 200 µs to 200 ms from 10 nA to 10 pA. Optional bias electric current compensation can give 10 pA resolution from […]

Telephone Amplifier by LF351+TBA820M

Audio and Amplifier | By: Diagram mania

circuit Telephone Amplifier by LF351+TBA820M If phone your light exceedingly ring. Invite come to this way. I thinks this circuit can help. It is Telephone Amplifier circuit. By have pillar equipment be IC LF351 perform enlarge telephone signal from pick up give the power goes up. Before transmit to IC TBA820M for amplify with a […]