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TTL RS232 driver circuit and Protect the PC from direct connection to hazardous voltages

TTL RS232 driver circuit. TTL driver circuit consists of 2 transistors and a few other passive components, a negative voltage for RS232 logic generated by the capacitor C7. TTL to RS232 driver circuit and a variable voltage output driver has a parallel termination impedance to match cable and TTL driver circuit, and provides the best […]

Making Wireless FM microphone

Making Wireless FM microphone as a beginner project is interesting, crystal oscillator can be controlled, with a harmonic change to 2p7-5 crystals. The oscillator will then be very stable, so stable in fact, that he could not even set! This means you can only use it to send CW .One solution to this problem would […]

Remote Control Breakers

Remote Control Breakers 40KHz TV-VCR light Source Repeater Circuit using 74C14, ZVN4306

FM stereo radio Decoder circuit

FM stereo radio Decoder circuit diagram using LM1800N, NE5532

Circuir diagram 1.3 GHz Transverter – DB9LN / DB6NT

Trouble with TV with using vcr and cable splitter?

Unknown Prince asked: I have two tv’s im using. Im having trouble getting a clear picture on either of the tvs. Im trying to set up a kind of mini closed circuit. But, each tv has a fuzzy picture. Can anyone tell me why and how to fix it? Here’s the set up: >TV 1 […]

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