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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.

Satellite Camera Controller with a PC and Motorcycles, this is the circuit diagram schema

Satellite Camera Controller with a PC and Motorcycles, this is the circuit diagram schema The back EMF voltage spikes produced by stepper motors (particularly higher voltage motors) can damage your PC’s printer port if connections are made incorrectly, fly back diodes are absent or connected in reverse, etc. The safest options are opto – isolated […]

Power audio circuit – 200 watt using 5200 and 1943

Power audio circuit – 200 watt using 5200 and 1943

Power Amplifier Circuits for learn

Power Amplifier Circuits for learn

LM339 IC for Voltage Detector and Circuit Diagram

LM339 IC for Voltage Detector and Circuit Diagram

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