194 articles written by D Mohankumar

Author: D Mohankumar

About: I was a writter on but now I have my own site where I publish from time to time.


IC 555 Design Note

D Mohankumar - 10/31/2010

The popular Timer IC 555 is extensively used in short duration timing applications. IC 555 is a highly [...]

LED Chaser Circuit

D Mohankumar - 10/30/2010

This is the circuit of a simple LED chaser. The LEDs lights one by one for a period [...]

Overflow Indicator Circuit

D Mohankumar - 10/24/2010

This Simple circuit can monitor overflow of water from the Overhead tank. The sensor placed close to the [...]

Electronic Cricket Match Game

D Mohankumar - 10/19/2010

This electronic cricket is a present for Kids. This simple battery powered circuit can be used to play [...]

PC Heat Monitor Circuit

D Mohankumar - 10/18/2010

The PC processor generates very high temperature during its operation which is dissipated by the large heat sink [...]

Simple Battery Monitor Circuit

D Mohankumar - 10/17/2010

This simple Battery Monitor lights an LED when the battery voltage drops below 9 volts. It is an [...]

Day Charger circuit

D Mohankumar -

This LDR controlled Adjustable charger can be used to charge the Rechargeable battery of portable devices. It charges [...]

On Demand Charger

D Mohankumar - 10/15/2010

This Automatic Battery charger turns On only when the battery demands charging current. It can be used to [...]
12v charger

Simple 12 Volt Charger

D Mohankumar -

This is the circuit of a simple 12 volt battery charger for Lead Acid battery. It gives 12 [...]

Photodiode Alarm Circuit

D Mohankumar - 10/14/2010

This Photodiode based Alarm can be used to give a warning alarm when someone passes through a protected [...]