Practical Electronic Ccts

The post presents a simple cellphone triggered remote control circuit that can be applied as a cellphone operated remote car starter. The unit would cost less than $20 to build. I have already covered quite a few interesting cellphone remote control circuits in this blog, all of which can be implemented to control or toggle […]

This is how to bug a phone line

TDA7000 FM radio receiver 88-108 MHz circuit + LM386. Simple circuit of easy-to-assemble home-built DIY FM radio receiver with TDA7000 dedicated circuit and

You can disable a drone in the air with a Wi-Fi antenna made from a can and a little clever coding. After all, a drone is basically a flying computer.

The automatic gain control circuit AGC provides a signal with less harmonics and additional amplification, between certain limits. As a result, it

VHF FM Aircraft Receiver is a superregenative receiver developed for listening to FM transmitters but also tunes the aircraft band and the top portion of the FM broadcast band. Receives both AM and FM (107mHz to 135 MHz). You can use this receiver with the any FM transmitter. The receiver is amazingly simple using only one transistor for the receiver section and one IC for the audio section. This circuit is a self-quenching regenerative RF receiver also known as a superregenerative...

Circuito Receptor de FM 70 - 120MHz com TDA7000, de alta sensibilidade, alimentado por 2,7 à 10V com placa de circuito impresso.

Tutorial on Field Effect Transistor FET as a switch. Using JFET as shunt and series switch, P-Channel JFET as a Switch, MOSFET as switch.

How to Build an L293D Motor Board Controller for Arduino: I am working on a small robot that can be controlled by an Arduino using wireless communications. But I was discouraged by the number of wires running from the Arduino and the breadboard. So I decided to reduce the number of wires by making my own …

Automatic Battery Charger Circuit for 12v Lead-acid The circuit which monitors battery charging and auto cut off / turn on the battery when charging done.

Presented here is an obstacle-avoidance robot project microcontroller (MCU). This project does not use any complex circuitry except a relay driver.

This overheating indicator circuit monitors the temperature of a water pipe. If the temperature of the pipe goes above a certain preset limit, it flashes an LED and generates a sound through a piezo buzzer...