Ham radio projects
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#RF
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rf remote control encoder and decoder
This document explains two RF 433kHz remote control chips specifically designed for remote control applications. The IC TWS-434, along with its encoder chip HT-12E from Holtek, forms a high-quality transmitter circuit, while the chip RWS-434, paired with the decoder IC...
Circuit Power transmitter of communitarian wireless TV lm1889 audio and video
This small circuit transmitter processes audio signals from a sound table or microphone, as well as video signals from a camera, DVD, or video cassette. It has a composite video output, allowing direct transmission from a computer over a free...
100W Medium Frequency Transmitter
The 100W4 is a two-tube medium frequency transmitter designed for pre-tuning to three frequencies within the medium frequency band, supporting emissions types A1, A2, and A3. In the A1 configuration, both tubes function as parallel oscillators. For A2 and A3...
Building an RF Remote Control System For Robotics Control
With a handful of inexpensive components, a little creativity, and the power of PicBasic, you can build some pretty outstanding robotics creations as Rob Arnold proves with his Ruf-Bot project. RF remote control is just way too cool not to...
Corsair and Commando TXs
This document provides information about the Corsair and Commando Transmitters designed by Dave Martin of WNKR. It outlines the construction of each transmitter and includes examples created by others. The circuit diagram presented illustrates the initial two stages of a...
Antenna Booster for FM AM and SW Receiver
This AM/FM antenna booster circuit amplifies the broadband signal from the antenna. This antenna booster is designed to work for FM, AM, and SW receivers.
The AM/FM antenna booster circuit is an essential component for enhancing radio reception across various...
RF Inductance Meter
This RF inductance meter measures RF chokes in the 500 nH to 50 µH range. A simple solution was required to measure hand-wound RF inductors in a secondary lab setting. The user intended to utilize this device occasionally and did...
915-MHz antenna monopole
The Tab antenna is a folded monopole that you miniaturize by forming it into an inverted L with a downward bend at the end. You can solder it perpendicular to a pc board or build it as part of a...
radio station blocker circuit
This device functions as a reversal of a radio station, sending a null signal to a selected frequency to eliminate the actual broadcast. The radio transmitter operates at a loss of 10,000W; therefore, this circuit is intended for use only...