Optical transmitter

Most consumer electronic devices utilize infrared remote controls for convenient operation. The carrier frequency of these remote controls typically ranges from 36 kHz to 38 kHz. Control codes are transmitted to the device's receiver in a serial format, which...

This compact FM transmitter operates with an RF output power of 500mW and can be powered by a 12-15V battery or power supply. The signal is modulated using frequency modulation (FM) techniques and employs four transistors. The transmitter consists...

This is a mini FM transmitter powered by two transistors and designed by Tony van Roon. This compact transmitter is straightforward to assemble, and its signals can be received on any standard FM radio. It has a range of...

This circuit consists of an L14G2 detector, two stages of gain, and an FM demodulator. Better sensitivity can be obtained using more stages of stabilized gain with automatic gain control (AGC). The circuit design features an L14G2 detector, which serves...

The circuit depicted utilizes a specialized launch tube T2 along with its associated components to create a high-frequency oscillator operating within the frequency range of 88 to 108 MHz. An electret microphone captures the audio signal, which is subsequently...

This is a simple 1-watt FM transmitter circuit that is easy to construct. It consists of four transistors, one of which serves as a stable oscillator. This is followed by a buffer stage to minimize frequency variations when adjusting...