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Posts tagged 国家统计局

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.

Audio Power Amplifier circuit diaggram using AN7112

Audio Power Amplifier circuit diaggram using AN7112

Free Download TDA7294 IC Second Voice recorder module and Service Manual free download, schematics, datasheets, eeprom bins, pcb

Free Download PDF TDA7294 IC Second Voice recorder module and Service Manual free download, schematics, datasheets, eeprom bins, pcb TDA7294 IC Second Voice Recorder Module. Non-volatile multi message recorder using ISD chips. Just change one resistor for longer duration. Standalone operation using just six onboard bottons. Record via built-in microphone or external line in. Speaker […]

Audio amplifier

Audio amplifier Using IRF9520, IRF520, TL071, 2N3904 Audio amplifier Using IRF9520, IRF520, TL071, 2N3904

LM555 Micro controller Circuit Variable Pulse Width Oscillator Output Graph part 31

LM555 Micro controller Circuit Variable Pulse Width Oscillator Output Graph part 31

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