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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.

3 channel microphone circuit

3 channel microphone circuit using BC550C, BC547, BC557 P1,P2,P3______5K R1,R11,R15____180K 1/4W R2,R12,R16____2M2 1/4W R3,R13,R17____750R 1/4W R4,R14,R18____1K 1/4W R5____________15K 1/4W R6____________220R 1/4W R7____________1K5 1/4W R8____________820R 1/4W R9____________150R 1/4W R10___________100K 1/4W C1,C6,C8______1µF C2,C4,C7,C9___100µF C3,C5_________220µF Q1,Q4,Q5______    BC550C Q2____________ BC547 Q3____________ BC557

How to make electronic fireworks ?

How to make electronic fireworks ? 1. Assembly provided the fireworks, but no axis because, to make this electronic fireworks we use battre lights instead of 3-volt fuse. 2. Lamp used was 3-volt lamps batrey have broken glass but do not break element. 3. It into the input light fireworks, and fireworks in the lid […]

Tester circuit

Tester circuit for electronics repair Tester circuit for electronics repair

9 volt circuit

9 volt circuit 9volt Voltage Regulator circuit using C1016

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