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Posts tagged 波思特,

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.

Battery Charger Circuit Diagram with Piezo Ttransducer

Battery Charger Circuit Diagram using LM393, 4011B, 7806, 1N4001, BD140

Led Strobe

6v led strobe circuit using CD74HC4017 and MM74C14 6v led strobe circuit using CD74HC4017 and MM74C14 Led Strobe 1 IC1 MC14584BCP IC2 CD74HC4017N T1 2N3904 or 2N4401 NPN transistor 8 D1 to D8 1N4148 or 1N914 Diodes 10 LEDs Blue, green or white Ultra-Bright LEDs with Vf = 3.2V or less at 20mA 1 R1 […]

Dual Audio Power Amplifier circuit

Dual Audio Power Amplifier circuit using KA2209 Dual Audio Power Amplifier circuit using KA2209 Bridge Audio Power Amplifier circuit using KA2209

stk Audio Amplifier scheme

stk Audio Amplifier scheme 30W Audio Amplifier Circuit using STK1030

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