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Intermediate Projects

Simple Adjustable Staircase Waveform Generator

Staircase signals find many applications in the field of electronics, such as in television systems, telemetry, and analogue and digital communications. Here is a...

Part 3 of 3: Using AVR Microcontroller For Projects

In continuation of the embedded control applications explained in Part 2, let’s now examine the use of inbuilt functions of AVR ATmega8535 (such as...

Monitor for 6V/12V Batteries

Rechargeable batteries of 6V and 12V are used in a large number of applications. It is imperative that these are maintained properly to get...

Simple Low-Power Audio Amplifier

The small-signal amplifier is generally referred to as a voltage amplifier because it usually converts a small input voltage into a much larger output...

Difference Counter for In and Out Gates

Sometimes, we need to know whether someone is still inside a building before it is locked. And if so, how many persons are still...

Efficient 5V Relay Driver

This design idea outlines a method to use an analogue switch and discrete components to reduce the power dissipated in relay actuation. Presented here...

Precision Null Detector

Precise determination of null point in AC/DC bridges helps us to evaluate accurate values of circuit components like L and C. Here’s a null...

Simple Tester for 74xx04 and 74xx14 ICs

The integrated circuits (ICs) 74xx04 and 74xx14 are very frequently used and reused during circuit design. Here xx stands for HC, HCT, AC and...

Subwoofer for Cars

This system needs to be attached to an existing car stereo amplifier to add extra 'boom effect' to the music. It has a dedicated...

Medicine-Time Reminder

We are all so busy with our daily lives that we forget to take our medicines on time, which can have several ill effects...

Automatic Room-lock and Lights circuit

This circuit counts and indicates up to nine persons present in the room and automatically locks the door and switches off lights as soon...

Rotation Counter

Presented here is a simple rotation counter which helps you measure the revolutions per minute (rpm) of any rotating object. As the project requires...

Temperature Sensing Diodes Selector

Low-cost semiconductor diodes such as 1N914, 1N4148 and 1N400X can be used as temperature sensing diodes in applications where high accuracy is not required....

Seven-Colour LED Lighting

Presented here is a simple circuit that uses six red, green and blue (RGB) LEDs to generate a running-light effect in seven colours—blue, green,...

ELECTRONIC MOTOR STARTER

This motor starter protects single phase motors against voltage fluctuations and overloading. Its salient feature is a soft on/off electronic switch for easy operation. The...

Electronic Door Lock

Home burglary incidents are on the rise. Homes without proper security measures in place are particularly more vulnerable. But, it is easy to avoid...

RPM Meter for Automobiles

An efficient way to measure the RPM of a vehicle is through its ignition pulses. RPM of a vehicle is directly proportional to the...

Efficient LED Blinking for Embedded Systems

Smart hardware design can simplify the embedded software and make it more reliable. Designers use blinking LED signals to indicate different status and for...
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