Single Transistor FM Transmitter circuit

An adjustable capacitor C10 and a coil L1 create a tank circuit that, along with Q1, C2, and R1, oscillates at a frequency within the FM band. The center frequency is adjustable by tuning C10. An electret microphone, M1, captures...

Schematic for the Micro FM transmitter

Tetsuo Kogawa's circuit is well documented, although not in a conventional schematic form. It has been entered into LTSpice for analysis, and the schematic is presented online with some comments. The circuit includes a small air variable capacitor (C1) with...

Marker-generator

The oscillator section employs three sections of a 7400 quad NAND gate integrated circuit. The 1 MHz signal generated by the oscillator is input into a 7490 decade counter, which is configured to divide by ten, producing a 100 kHz...

15w 12 km range fm transmitter by

This is a well-designed basic FM transmitter that allows the reception of transmitted signals within a range of 1-2 km using a standard FM receiver. Additionally, the circuit features a coil mounted on the printed circuit board. The amplitude of...

MePADS

If you are considering building the Desert Ratt 2, it is advisable to read all the accompanying text, as it contains relevant construction details. Engaging with the comments and replies can also provide additional insights, as previous blog posts have...

Ltc1628-sync Minimizes Input Capacitors In Multioutput High Current Power Supplies

The LV2282VA is an FM Transmitter integrated circuit (IC). The multiplex (MPX) block generates a stereo modulated composite signal from left (L) and right (R) audio inputs. The radio frequency voltage-controlled oscillator (RF VCO) incorporates an FM modulation function. An...

Wireless Auto Tachometer

Anyone performing their own automobile tune-ups knows how important it is to know your engine's speed. With this tachometer, you can measure your engine's speed without any connections or annoying timing lights. The described tachometer is a non-invasive device designed for...

3v fm transmitter circuit

This 3V FM transmitter circuit is one of the simplest and most effective basic transmitters, offering a commendable transmitting range. It is remarkably powerful considering its small component count and 3V operating voltage. It can easily cover over three floors...

Four channel RF remote control

This is a simple RF transmitter circuit utilizing the Holtek HT-12E encoder chip and an AM 418MHz transmitter module (WZ-X01). The use of hybrid RF transmit/receive modules simplifies the construction of the RF remote control. The transmitter can operate with...