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MIC Recorder circuit

Isd Voice Recorder circuit using ISD25120, 1N4148, BC557, BC547 MIC Recorder circuit This circuit can be used with normal tape recorders and sound memory, and Recording the sound. Now that you’ve built your recorder circuit using ISD25120, 1N4148, BC557, BC547

DIY Intercom Circuit

DIY Intercom Circuit Intercom Cable Full-duplex Intercom circuit schematic , cable on the way to the intercom circuit

Circuit Diagram Radio Stereo Coder Multplexer Part 1

Circuit Diagram Stereo Coder Multplexer Multiplexer consists of 4 TTL ICs and transistors. A 7600-kHz crystal oscillator built with the 3-NAND The IC’s 2 and 3 of type SN7490. Now think of 76 kHz signal as a divider of two Werken. Either 38 kHz signal and the output Q Qnot decreased. Transistors T1 and T2 […]

Ultra-sonic sound processing with schema electronic audio

Ultra-sonic sound processing with schema electronic audio Parts List SEMICONDUCTORS —————————————————- IC1 567 phase-locked loop, integrated circuit U1 LM386 audio power amplifier, ic Q1, Q2 2N391M NPN transistor Q3 MPF102 JFET transistor RESISTORS (All fixed resistors are 1/4 watt, 5% units.) —————————————————- R1, R2 220,000 ohm R3-R6 2,200 ohm R7 1,000 ohm RS, R14 270 […]

Stereo Audio Preamp schematic

Stereo Audio Preamp schematic using KA1222 Stereo Audio Preamp schematic using KA1222

LM555 Micro controller Circuit Variable Pulse Width Oscillator Output Graph part 31

LM555 Micro controller Circuit Variable Pulse Width Oscillator Output Graph part 31

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