Intercom This circuit was requested by an school teacher. It is a simple intercom that anyone can put together and get to work. It is based on the LM380 IC chip. This chip is able to put out 2 watts of power if it is heat sink properly. ….

Transistor intercom circuit Here is a simple but effective intercom circuit that is based fully on transistors.The circuit is based on a three stage RC coupled amplifier. When the pushbutton S2 is pressed, …

Mini intercom by one ic op-amp This is mini size intercom circuit. It uses IC Op-amp number LM380 just one as a result can work already. When switch S1 stay in a position speaks loud show in circuit picture….

Doorphone Intercom by IC LM386 For the first time, this circuit was designed by two authors, Mr Laurier Gendron of Burnaby in British Columbia, Canada, and myself. Please make sure you visit Laurier’s web site, Handy Dandy Little Circuits. This page is also available in French by clicking on the flag…..

LM390 MiNi Intercom Here is Intercom circuit,It Very easy Circuit. Use IC LM390 for Amplifier Sound Form Speaker or Mic.
Control S1a change Talk and Listen…..

Wireless Protable Intercom Voice Activated Chamberlain wireless portable inte- Provides convenient and expandablemunication for your home- Advanced features include voice activation and monitor mode- Crystal clear secure 900 MHz …..

FM Transmitter Circuit
This circuit is a simple two transistor (2N2222) fm transmitter. No license is required for this transmitter according to FCC regulations regarding wireless microphones…..

Long range FM transmitter The power output of most of these circuits are very low because no power amplifier stages were incorporated….

Single chip FM transmitter circuit using MAX2606 Here’s a single chip FM transmitter circuit using Maxim semiconductors IC MAX2606. The MAX2606 is a compact, high-performance intermediate frequency VCO specially designed for wireless communication circuits. …

BA1404 HI-FI Stereo FM Transmitter Whether you want to create your own radio station, transmit the music around the house, or simply create a wireless link between your iPod and a receiver in your car, this transmitter will let you do these things easily…..

2 Transistor (BC548) FM Voice Transmitter Take care with transmitter circuits. It is illegal in most countries to operate radio transmitters without a license. Although only low power this circuit may be tuned to operate over the range 87-108MHz with a range of 20 or 30 metres. ….

BH1417 Stereo PLL FM Transmitter

High Quality 200mW FM Transmitter by BF199 Here is the latest and greatly improved TX200 VFO/VCO FM transmitter. The most versatile transmitter to date that can be turned into high fidelity stereo PLL based 200mW FM transmitter….