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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.

Incubator Timer Circuit

Incubator Timer Circuit The circuit of the proposed incubator egg timer using LM741 This Egg Timer is quick, easy to use

Circuit Diagram Radio Stereo Coder Multplexer Part 2

Circuit Diagram Radio Stereo Coder Multplexer

A simple low cost LED pulser

A simple low cost LED pulser using a 555 timer device A simple low cost LED pulser using a 555 timer device

STK463 Audio Amplifier Design

STK463 Audio Amplifier Design STK463 Audio Amplifier Design Circuit Diagram STK463 Audio Amplifier Design STK463 Audio Amplifier Design

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