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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.

Supply PV inverter Circuit Diagram

Supply PV inverter Circuit Diagram Supply PV inverter +16V to +30V High quality PV grid-Connected inverters PV charger controllers using BD139

+5V 10A Regulator circuit

+5V 10A Regulator circuit using 7805 IC

How to a solar cell

How to a solar cell Solar cell / photovoltaic cells, is a semiconductor device consisting of a pn junction diode, where, in the presence of sunlight to create electrical energy, because it has the function of the tool can convert sunlight directly into electricity. Solar cells / photovoltaic cells made in 1839 by Edmund Becquerel, […]

AutoScout Time Out with On Off Circuit

Automatic Time Out with On Off Circuit using 74HCT74, 4013

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