In this post I have explained a simple electronic door circuit for pets which can be used as an electronic dog door for allowing only your specific pet dog to use the entrance, while keeping it locked for “strangers”. The idea was requested by Mr. Dave Monette. Circuit Objectives It’s been a while since we […]
Transmitter Circuits
Bluetooth Function Generator Circuit
In this article I have explained a simple Bluetooth function generator circuit which can be used for testing and troubleshooting various critical audio video equipment and gadgets Using a Function Generator Function generator is vital equipment for an engineer, professional, hobbyists, or someone who reached above “beginner level” in electronics. Function generator is an expensive […]
Laser Communicator Circuit – Send, Receive Data with Laser
In this article I have explained how to make a simple laser communicator circuit for sending and receiving data through laser beam. Laser has been a boon since its invention. Laser is used in wide variety of applications, from Blu-ray driver to high powered cutting torch. There are also many classifications of laser technologies. Here […]
Wireless Mobile Phone Charger Circuit
A wireless mobile phone battery charger is a device that charges a compatible cellphone or mobile phone placed close to it, through high frequency wireless current transfer, without any physical contact. In this post I have explained how to build a wireless cellphone battery charger circuit for facilitating a cordless cellphone charging without employing a […]
Simple Cellphone Jammer Circuit
This is a RF jammer designed for the U.S. 800 MHz cellular phone band (870-895 MHz). This works by generating an overwhelming sweeping RF carrier on the cell phone handset’s operating frequency range. Circuit Operation An Exar XR2206 Multi-purpose Generator is going to function as the triangle wave generator for supplying the sweep part of […]
10 Simple FM Transmitter Circuit Diagrams Explained
An FM transmitter circuit is a high frequency wireless device which is able to transmit voice signals into atmosphere so that it can be received by a corresponding FM receiver circuit for reproducing the voice signals in a loudspeaker. Here we’ll discuss how to build small FM transmitter circuits using 10 different methods, one that […]