PWM or pulse width modulation is a very common method used for controlling the power across devices like motor, light etc. In the PWM method the power across the load is controlled by... Read more
Many guys here were asking for a frequency counter and at last I got enough time to make one. This frequency counter using arduino is based on the UNO version and can count up to 40KHz... Read more
Here is a simple dancing light circuit based on NE555 (IC1) & CD4017 (IC2). The IC1 is wired as an astable multivibrator to provide the clock pulses for the CD4017. For each clock pulse... Read more
Description: A multi-wire cable tester with a separate LED for each wire. Will show open circuits, short circuits, reversals, earth faults, continuity and all with four IC’s. Designed... Read more
Very simple, versatile modular design. No limits to the number of modules used in the ring Circuit diagram using LEDs: Circuit diagram using Lamps: Parts: R1 1K5 1/4W Resistor R2 680R 1/4W R... Read more
This project uses an LM3915 bar-graph IC driving two sets of ten LEDs for a 30dB range. The circuit is unique because it has an additional range of 20dB provided by an automatic gain control... Read more
Description This circuit is a simple form of the commercial UPS, the circuit provides a constant regulated 5 Volt output and an unregulated 12 Volt supply. In the event of electrical supply... Read more
If you are an RC modeler, then this circuit is for you! The compact RC Switch let you turn something on and off from a regular R/C channel. The device is powered entirely by the receiver, dr... Read more
Many a times equipment at workstations remains switched on unnoticed. In this situation, these may get damaged due to overheating. Here is an add-on device for the workbench power supply tha... Read more
The compact LiPo battery charger introduced here can be used to charge almost all standard 2S LiPo battery packs. The circuit, designed around generally available low-cost components, is ver... Read more
