Blown Fuse Indicator
A fuse is an electrical safety device that operates to provide overcurrent protection of an electrical circuit. Its essential component is a metal wire...
Panic Alarm
If you feel threatened or need emergency assistance, simply activate this panic alarm. It will catch the attention of others for immediate help. The...
Shock-Proof Remote Switch
Using this shock proof remote switch circuit, you can control any AC/DC appliance remotely through inexpensive, low-voltage cabling and a standard push switch. The...
Infrared Burglar Alarm
A special feature of this infrared burglar alarm is latching operation. Also, the circuit is highly sensitive.
The circuit comprises transmitter and receiver sections. Whenever...
Low-Range AM Radio Transmitter
Here is a simple low range radio transmitter for transmission up to 25 metres. It is basically an AM modulator whose signal can be...
Build Your Own Stereo Amplifier Using TDA2822
Here is a simple stereo amplifier that can be used to amplify audio from mobile devices. IC TDA2822M used in the circuit comes in...
Decade Counter Based Flash Light
This decade counter based flash light circuit generates flashing lights in running pattern. In conventional running lights, the LEDs glow one by one. In...
Audio Noise Limiter
Audio noise can be annoying, especially if you are trying to listen to a very weak radio station. Peaks of unwanted background noise completely...
Battery Level Indicator
Normally, in mobile phones, the battery level is shown in dot or bar form. This lets you easily recognise the battery level. Here we...
Designing Anti-Sleep Alarm Circuit
Most accidents on highways at the night occur due to drivers’ poor vision caused by the continuous exposure of their eyes to the bright...
Dice with 7-Segment Display
This 7-segment display dice circuit has been realized using an astable oscillator circuit followed by a counter, display driver and a display. Here we...
Fuel Reserve Indicator For Vehicles
Here is a simple fuel reserve indicator circuit for monitoring the fuel level in vehicles. It gives an audio-visual indication when the fuel level...
Automatic Water Pump Motor Controller
Municipal corporations in many cities supply water during early morning hours. So, you have to wake up early, just to switch on your motor...
Water Level Indicator using 7 Segment Display
This water level indicator using 7 segment display indicates the water level (low, half and full) in the tank. A buzzer is added to...
5V from Portable Wind Turbine
This project deals with the design and development of a portable wind turbine unit, capable of generating electricity from the kinetic energy in the...
Fire Alarm Using Thermistor
In this fire alarm circuit, a thermistor works as the heat sensor. When temperature increases, its resistance decreases, and vice versa. At normal temperature,...
RF Signal Detector
This simple RF signal detector circuit can be used to trace the presence of RF signals and electromagnetic noise in your residential area, office...
Rechargeable Torch Based on White LED
Rechargeable torches don’t come without problems. You need to replace the bulbs and charge the batteries frequently. The average incandescent light-emitting diode (LED) based...