Schematic Power Amplifier and Layout

Infrared Motion Detector electronic circuit schematic diagram Using TR 2N2222, SY32PT    

LDR Sensor Module for human body detection LDR Sensor Module for human body detection

A simple switching transistor circuit to test

stereo headphone circuit diagram

HOME INTERCOM and TELEPHONE SYSTEM using stk015 HOME INTERCOM and TELEPHONE SYSTEM using stk015 R1 ……….. 1K2 R2 ……….. 5K6 R3 ……….. 22K R4 ……….. 4K7 VR ……….. Pot 10K C1 ……….. 47nF C2 ……….. 100nF C3 ……….. 10uF/16V C4 ……….. 10nF C5 ……….. 47uF/25V C6 ……….. 470uF/35V C7 ……….. 1000uF/35V D1 ……….. 2A D2 […]

Echo Repeter and preamp mic schematic Part R1,6,25,36,48,54           2K2 R2,7,16,27               470K R3,8,26,31               12K R4,9,39               220R R5,10                   22K R11                   1M5 R12,45                   10K R13,52,53,58,59           […]