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Intermediate Projects

Voltage Based Controller For Switches

Here’s a simple voltage based controller circuit for controlling four switches from a distance through just a pair of wires. Voltage based controller circuit In the...

Low-Cost Battery Charger

Here is a very simple and low-cost charger for 12V, 7Ah lead-acid batteries. It can also be used for powering automobile engines and emergency lighting systems.

Geyser Timer

This geyser timer circuit sounds an alarm after the set timing of 22 minutes when the water is heated up. Geyser timer circuit The circuit comprises...

Electronic Fuse

An absolute necessity of every electronics lab is a workbench power supply. The power supply should be regulated and protected against short circuit. Most...

IC 555 Timer Tester

This simple and easy-to-use IC 555 timer tester not only tests the IC 555 timer in all its basic configurations but also tests the...

Zener Value Evaluator

Using this simple Zener value evaluator circuit and a known-value zener diode, you can find the breakdown voltage value of any zener diode. The...

Capacitor Evaluator

Using this circuit and a known-value capacitor, you can find out the value of any capacitor. This circuit can be divided into capacitor evaluator...

Noise Muting FM Receiver

The tuning of a frequency modulated (FM) receiver to a FM radio station frequency involves a lot of ‘hissing’ noise in between the stations,...

BODMAS Rule

BODMAS rule is an acronym to help children to remember the order of operations in calculations.. The term BODMAS stand for bracket, of, division,...

Safety Guard: Time Delay Circuit

When voltages suddenly changes, the change is not smooth, it may go on fluctuating for a short while. This may not be a good...

Shock Warning Circuit

Electrical leakage can cause lethal shocks. But such an unfortunate situation can be avoided with this shock warning system. It uses minimal number of...

DC Changeover System with Battery Protection unit

Emergency lights commonly available in the market come with battery over-charging protection but no discharging protection. Here is a DC changeover system that protects...

Solid-state Relay

The basic function of a relay is to switch on power to a load using an electrically isolated, low-power control signal. Hitherto, electromechanical relays...

Three Colour Display Using Bicolour LEDs

Presented here is a three colour display that uses bi-colour LEDs for display. The circuit is built around two IC CD4017, some transistors & a...

Power Supply Reversal Correcter cum Preventer

When power-supply polarities of an electronic device are accidentally interchanged, the device runs the risk of damage. The danger can be avoided by adding...

Pulse Generator

This pulse generator circuit is very useful while checking/operating counters, stepping relays, etc. It avoids the procedure of setting a switch for the required...

Programmable LED Indicator

In this circuit, IC CD4017 has been used to program a bicolour LED indicator in 10 different modes which can be selected with a single push-button switch.

Automatic Switch-off Battery Charger

Presented here is an automatic switch-off battery charger based on a 555 timer IC. This smart charger automatically switches off when your rechargeable batteries...
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