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That small circuit transmitter it is ideal for ready espionage for strip from radio Fm or receiver of VHF. Of course the recreational purpose also exists and the children will adore to have a transmitter that allows to speak for a radio FM placed at distant place and like this pretend the secret agent.Electronic Schematics Circuit Zone
The above FM transmitter design is a result of many hours of testing and tweaking. The goal was simple; to test many existing BA1404 transmitter designs, compare their performance, identify weaknesses and come up with a new BA1404 transmitter design that improves sound quality, has very good frequency stability, maximizes transmitter's range, and is fairly simple for everyone to build.144MHz FM Receiver radioshop.co.uk
This was originally designed to receive the telemetry from the UOSAT (Univesity of Surrey LEO) Satellites. From the days when synthesisers were not always used, it is a basic 144MHz, crystal controlled FM receiver with AFC.Phase locked loop
A phase locked loop or phase lock loop (PLL) is a control system that generates an output signal whose phase is related to the phase of an input signal. There are several different types; the simplest is an electronic circuit consisting of a variable frequency oscillator and a phase detector in a feedback loop.The oscillator generates a periodic signal, and the phase detector compares the ...Inband 70cm ATV Repeater Example Amateur Television
Inband 70cm ATV Repeater Example By Tom O'Hara W6ORG Email: Retired owner of P.C. Electronics, The Leader in Amateur Television Equipment for 50 years history Last update January 1, 2015A plete Guide to Design and Build a Hi Fi LM3886 ...
Finally, you’ll need to know your input voltage. This is the output voltage of the audio source you’ll be amplifying. It may be in the device’s user manual, but if not, you can get a rough estimate by playing a 60 Hz pure sine wave (there are apps that will do this) at full volume and measuring the AC voltage between ground and the left or right channel with a multi meter.A low power AM transmitter for the broadcast band
I stopped listening to AM radio decades ago, but around 1998 I wanted to put together a crystal radio kit for my nephew in an attempt to get him interested in radio as I had been at his age.Automatic Water Tap (Faucet Valve) Controller
As you may well know, automatic control for a water tap can significantly reduce water consumption to some extent. Besides, automatic faucets can eliminate cross contamination by keeping hands and germs away from commonly used surfaces.Tube CAD Journal
— Since 1999 — Welcome to over 50 articles on amplifiers, tube based preamps, crossovers, headphone amplifiers, single ended amplifiers, push pull amplifiers, Circlotron circuit design, hybrid amplifiers, cascode circuits, White cathode followers, grounded cathode amplifiers, tube series regulators and shunt regulators, the Aikido amplifier, tranformer coupling, DACs and tubes — and ...Build a Versatile Miniature High Rate ESC with BEC and Brake
Build a Versatile Miniature High Rate ESC with BEC and Brake. July 1, 1999 for Sailplane & Electric Modeler Magazine. This electronic speed control (ESC) for brushed motors combines the features of two of my earlier designs.
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