Optical 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...

The schematic presented is a circuit for a 555 tracking transmitter. The 555 timer is a well-known versatile integrated circuit utilized in various electronic projects. In the circuit described, this IC generates a tone that is transmitted through an...

The ultra-simple one-transistor IR transmitter is designed to transmit sound from any 8 or 16-ohm audio source, such as a TV, radio, or tape recorder, using an infrared beam of light. The one-transistor infrared (IR) transmitter circuit operates by modulating...

This project consists of a wide range receiver and one transmitter. Together they will form a unit which will help you tuning your homebrewed transmitter. The most difficult part of homebrewing is the tuning part of the transmitters. How...

The following plans outline the construction of a compact tracking transmitter that can be detected using an FM broadcast band radio receiver. The transmitter operates on a battery voltage range of 3 volts to 9 volts and has a...

An oscillator can be constructed using an LC (inductor-capacitor) tank circuit. By varying the capacitance of the capacitor in the LC tank circuit, the frequency of the oscillator can be adjusted. An LC tank circuit serves as a fundamental building...