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This circuit enables the use of a portable VHF FM radio to receive audio from stations that exclusively broadcast on the local cable network. This circuit operates by modulating the audio signals from the local cable network onto a carrier...
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This article discusses a simple 5-channel radio remote control circuit utilizing the TX-2B and RX-2B integrated circuits from Silan Semiconductors. The TX-2B/RX-2B is a remote encoder-decoder pair suitable for remote control applications. It features five channels, a wide operating...
This receiver is a modification of Charles Wenzel's Two Transistor Reflex Radio. Instead of a ferrite AM loopstick antenna, a magnetic loop antenna is used, and an LM386 amplifier stage has been added to drive an 8-ohm speaker. A...
The project concept originated nearly two years ago during research for a new lighting board for a small theater. The existing board was nearly twenty years old and in dire need of replacement. However, the costs associated with purchasing...
This circuit utilizes a ceramic tuning resonator with a frequency of 3.587 MHz, alongside resonator filters available at frequencies of 5.5 MHz, 7.7 MHz, and 10.7 MHz. The transmission range of the device is approximately 2-4 km. The circuit...
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