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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.

Higher brightness variable circuit

Higher brightness variable circuit using LM334Z, BC558

How to Make Electronic Circuits to drive the rats, mosquitoes and other animals

This circuit functions with inaudible (ultrasonic) sound. Frequency to 20 kHz sound was heard by humans. The sound frequencies above 20 kHz is called ultrasonic sound. Described a series of produce (emit) ultrasonic sound frequencies between 40 and 50 kHz. Like the remote control system is also cirucit consists of a mini transmitter and receiver […]

Time Recovery Delay Circuits LM555

Time Recovery Delay Circuits LM555 LM555 Electronics Schematic Diagram Time Recovery Delay Circuits part 26

i want the aural modulator circuits available all over the world?

bhavin.kotak asked: aural modulator is used in tv transmitter section…i want its circuit diagram or block diagram or pin diagram….present and used all over the world… i m living in india….but i want the ckt diagram of aural modulator used all over the world in the tv transmitter section… i want all the data available […]

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