fm telephone line bug transmitter
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simple and powerful FM transmitter
A simple and powerful FM transmitter is an interesting project that utilizes one transistor and operates within a frequency range of 100 MHz. The circuit diagram includes a description of the FM transmitter and various related interesting projects.
The FM transmitter...
Bug FM Transmitter
The circuit is basically a radio frequency (RF) oscillator that operates around 100 MHz. Audio picked up and amplified by the electret microphone is fed into the audio amplifier stage built around the first transistor. Output from the collector is...
76MHz to 119MHz Fm transmitter
TR1 (BC547) is an inverted Hartley oscillator which based upon an inductor fabricated on the PCB. This makes it megga-stable, and setable anywhere in the VHF FM band (76MHz to 119MHz) and the BB105 varicap makes it voltage tuneable over...
RF Remote Control Switch Rx-Tx circuits
This circuit includes a 2048 radio remote control transmitter and a corresponding wireless receiver that features high reception sensitivity and low power consumption. The combination of these two components provides a highly reliable remote control system, suitable for various applications...
Build a FM radio transmitter
This guide provides instructions for becoming a radio pirate by creating a low-power FM transmitter to broadcast content on the airwaves. It serves as a follow-up to a recent call for easing restrictions on radio broadcasting in the Maldives. The...
Schematic Diagram FM Transmitter 4Watt
L2 RFC (resistance 1MOhm with an inductor wrapped around it, composed of multiple coils made from fine insulated wire. The scratch of the inductor connects to the resistance, forming a parallel L-R circuit.) With capacitors C7 and C8, we adjust...
Sensitive RF Voltmeter Probe
Sensitive RF Voltmeter Probe Circuit. This circuit measures RF voltages beyond 200 MHz and up to approximately 5V.
The sensitive RF voltmeter probe circuit is designed to accurately measure radio frequency (RF) voltages in the range exceeding 200 MHz, with...
long range stable fm transmitter
This is a long-range stable FM transmitter circuit. The circuit utilizes an LM2950 5V voltage regulator IC in a TO-92 transistor package, which provides a stable 5V to the oscillator until the 9V battery voltage drops to 5.5 volts, ensuring...
Quality FM transmitter circuit
This house FM transmitter for your stereo or any other amplifier provides good signal strength up to a distance of 500 meters with a power output of approximately 200 mW. It operates on a 9V battery. The audio-frequency modulation stage...