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Posts tagged DPDT

Schematic diagram for a broadband QRP SWR metering circuit and SSB TRANSCEIVER 80M / 40M boster filter IF Radio

A schematic diagram for a broadband QRP SWR metering circuit for use in a QRP antenna tuner. One could simply hold a momentary DPDT switch down and watch the LED while tuning the capacitors of the antenna tuner for minimum or zero light.

555 timer MCT2E opto-coupler

The main components used are 555 timer MCT2E opto-coupler The main components used are 555 timer MCT2E opto-coupler

sound design equipment

sound design equipment Mixer 10 Chanels for Shure Microphone systems sound design equipment Part R1,2,9                 2K2 R3,10                 47K R4,20,21,22             22K R5,111                 4K7 R6,8,12,13,14,16,17,18,19    10K R7                 100 Ohm R15                 68K POT 1,2,3,4,6    […]

Oscillator Circuit using 555

Oscillator Circuit using 555

Circuit diagram remote control

TV remote control Circuit diagram using SL490 This is a 32 channel infrared remote controller circuit fundamentally includes key pad, decoder, transducer stage, an output and a battery. Every key pad button generates 5 bit binary code and IC1 sends this code to the IR leds through D1 and D2 diodes.  Code is shaped from […]

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