The Simple Mobile Incoming Call Detector is a clever circuit designed to pick up incoming calls on a mobile phone and light up an LED. This circuit is really useful in loud places where you might not hear the regular ringtone. It works by detecting the radio frequency RF signal that a phone sends out […]
Simple Electromagnetic Telephone Ringer Circuit
A simple electromagnetic telephone ringer circuit is a device that helps you know when someone is calling without needing to connect directly to the phone line. This is really useful in situations where you can not or do not want to tap into the phone lines. The circuit works by picking up the electromagnetic field […]
12V Battery Powered Fluorescent Lamp Driver Circuit
A fluorescent lamp needs a high voltage alternating current to start glowing and keep shining. The circuit here is 12V Battery Powered Fluorescent Lamp Driver Circuit. This circuit cleverly changes a low voltage direct current from a battery into a high voltage alternating current, which helps the fluorescent tube work. It is really useful for […]
Simple DIY Water Level Monitoring Circuit
A simple but very effective DIY water level monitoring circuit is a great way to keep an eye on water levels in tanks or reservoirs. This circuit uses the IC 555 timer set up in astable mode, which creates a constant oscillating signal. When the water hits a certain level this signal turns on a […]
Tone Generator Doorbell Circuit using Dual IC 555 Timers
A circuit made to work as a Tone Generator Doorbell uses Dual IC 555 Timers making it a simple but very effective way to create a tone when someone presses the button. The IC 555 timer is set up to work in two modes astable and monostable, which is super important for building a tone […]
Simple 9V Battery Powered Transistor Intercom Circuit
An intercom system is a device that lets people talk to each other over short distances. The Simple 9V Battery Powered Transistor Intercom Circuit is great for helping people communicate in places like homes or offices. This circuit is easy to understand and works really well using only transistors to make it function. It runs […]