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Speaker protector – Circuit Schematic
Speaker protector
When the amplifier is switched on, the speaker gets popped up by a high voltage and you can hear a loud thud sound from the speaker. This stuff is very harmful ...
Single transistor audio mixer – Circuit Schematic
Single transistor audio mixer
Many audio mixer circuits have been published here. But I think, this one is the simplest of them. This very simple audio mixer circuit uses only one transistor...
Simple IR audio link – Circuit Schematic
Simple IR audio link
Here is a simple IR audio link that can be used to transmit audio signals up to 4 meters. The signal to be transmitted is applied to the base of Q1 via resistor...
Tone Generator Circuit-Simple Calling Bell Circuit – Circuit Schematic
Tone Generator Circuit-Simple Calling Bell Circuit
A tone generator circuit,which can be used to make a simple calling bell circuit is shown here.It is made using 8021 IC which has built in ding dong sound produ...
Power megaphone circuit – Circuit Schematic
Power megaphone circuit
Just about any power transistor can be used in this megaphone. Its suitable for boats, playing fields etc. the transistors Q1 & Q2 are the HEP-230 type which ar...
A quality tone control circuit using opamp and few passive components – Circuit Schematic
A quality tone control circuit using opamp and few passive components
Tone control circuit using opamp and a baxendall passive tone control circuit. Overall gain is 25db with 20db boost & cut. Powered using 15V dual supply.....
Musical horn circuit – Circuit Schematic
Musical horn circuit
Here is a simple circuit diagram of a simple musical horn using two NE555 ICs. Two ICs are wired as astable mutivibrators. The output of first multivibrator is ...
Muti-channel audio mixer circuit based on LM3900 IC. Four channels – Circuit Schematic
Muti-channel audio mixer circuit based on LM3900 IC. Four channels
A simple multi-channel audio mixer circuit using LM3900 quad amplifier is given below. The circuit consists of 4 channel quad amplifier (LM3900). Two mic audio ...
Small or Mini Audio Amplifier Circuit using TDA 7052 IC-Deliver 2 Watts – Circuit Schematic
Small or Mini Audio Amplifier Circuit using TDA 7052 IC-Deliver 2 Watts
A simple mini or small audio amplifier circuit with diagram and schematic using TDA 7052 IC from philips. Ideal to use as a pocket radio amplifier circuit which...
Low pass filter for subwoofer – Circuit Schematic
Low pass filter for subwoofer
Many low pass filter circuits for subwoofer are given here and this is just another one. The circuit given here is based on the opamp TL062 from ST Micro electr...
Low cost Mic Mixer – Circuit Schematic
Low cost Mic Mixer
This is the schematics of a low cost mic mixer that can be assembled from the components in your junk box. This two channel mike mixer is designed for handling ...
LM1800 Stereo Demodulator – Circuit Schematic
LM1800 Stereo Demodulator
LM1800 is an integrated FM stereo demodulator IC which has a number of good features integrated on it which makes it possible to design a high quality FM stereo...
LA3161 Stereo Preamplifier for car stereo 12V operation – Circuit Schematic
LA3161 Stereo Preamplifier for car stereo 12V operation
LA3161 is an integrated 2 channel pre-amplifier intended for car stereo applications. LA3161 Stereo Preamplifier can be operated from 12V DC.....
IR Headset Circuit with headphone Transmitter and Receiver diagram – Circuit Schematic
IR Headset Circuit with headphone Transmitter and Receiver diagram
Here is a simple IR headphone circuit that is suitable for listening to TV or radio with out disturbing others. For beginners the IR headset is a better option ...
Hi-Fi DX Bass circuit – Circuit Schematic
Hi-Fi DX Bass circuit
Here is the circuit diagram of a passive DX bass circuit that can be used with almost all audio amplifiers. This circuit is designed by Mr. Emmanuel Chipula ( e...
Guitar pre-amplifier using uA 741 – Circuit Schematic
Guitar pre-amplifier using uA 741
A preamplifier circuit suitable for high impedance type electric guitar pickups is given here. The circuit is based on a uA 741 op-amp (IC1). The IC1 is wired a...
FM stereo demodulator circuit based on AN7415. 3V operation good channel seperation – Circuit Schematic
FM stereo demodulator circuit based on AN7415. 3V operation good channel seperation
AN7415 based FM stereo demodulator circuit. 1.6 to 7V operating voltage range. High gain and low distortion.....
FM adaptor circuit for car stereo – Circuit Schematic
FM adaptor circuit for car stereo
With this compact FM adaptor circuit plugged into the audio out of your cassete player or i Pod out put, you can listen your favorite music on your car stereo. ...
Doorbell Circuit with Diagram and Schematic using UM 66 IC – Circuit Schematic
Doorbell Circuit with Diagram and Schematic using UM 66 IC
A simple doorbell circuit diagram and schematic designed using UM 66 IC, which is a music sound generator. This is an easy to make electronic doorbell circuit.....
Volume Control Circuit Schematic using DS 1669 Potentiometer IC – Circuit Schematic
Volume Control Circuit Schematic using DS 1669 Potentiometer IC
A digital volume control circuit diagram using DS 1669, a potentiometer IC.This can be used as a digital volume controller for audio amplifiers and other applic...