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Beginners Projects

Object Detection Circuit using IR Sensor

There are various applications of IR sensors such as TV remote controllers, burglar alarms and object counters. Here we have used IR sensors (infrared...

Solar Battery Charging Indicator

Here is a battery charging indicator circuit of a simple charging monitor that indicates whether the storage battery of a solar power unit is...

Digitally Adjustable Dancing Lights

You might have come across several types of adjustable dancing lights (flickering LEDs). Most of them use presets (variable resistors) to adjust the rate...

Low-cost Stopwatch

Here is a simple circuit of a low-cost stopwatch that can count up to 99 seconds. The circuit uses CD4060, CD4013, CD4033, LTS543 and...

PC Power Manager

Very often we forget to switch off the connected peripherals like monitor, scanner and printer while switching off our PC. This leads to needless...

Crystal AM Transmitter Circuit

Here is the circuit of a medium power AM transmitter that delivers 100-150 mW of radio frequency (RF) power. AM transmitter circuit At the heart of...

Digital Soil Moisture Tester Circuit

Here is a simple and compact digital soil moisture tester to check whether the soil is dry or wet. It can also be used...

Multitone Siren

This multitone siren is useful for burglar alarms, reverse horns, etc. It produces five different audio tones and is much more ear-catching than a...

Overheating Indicator for Water Pipe

This circuit monitors the temperature of the water pipe. If the temperature of the pipe goes above certain limit, it flashes an LED.

Smart Laptop Docking Station

You can easily convert your ordinary docking station into a smart electronic laptop docking station with an anti-theft alarm. The circuit presented here can...

Multi-utility flashlight

This multi-utility flashlight consists of three sections: a flasher, a sound-to-light display and a white LED-based flashlight. Multi-utility flashlight circuit The flasher circuit is built around...

White LED Light Probe for Inspection

This white LED light probe circuit is useful for inspecting narrow spaces like the inside of the CPUs, monitors, PCB modules and other electronic...

Digital Night Vision Goggle Circuit

At night, on highways, the high-intensity light from the headlight of heavy vehicles blinds oncoming light vehicle drivers (bike riders and car drivers) for...

Water Pump Controller

A water pump controller senses the level of water in a tank and drives the water pump. The circuit described here is built around...

Clock Tick-Tock Sound Generator & LED Pendulum

Wooden-case, battery-operated wall clocks with pendulums are available in the market. Some even have chimes. What is missing is the tick-tock sound of old...

Photo Counter

You can use this photo counter gadget to detect whether somebody opened your cupboard or drawer in your absence. The gadget is small and...

Touch Sensitive Alarm

Security has been a major concern for people for long. Any personal belonging kept out of personal reach is prone to attack and sometimes,...

Emergency Photo Lamp Circuit

This emergency photo lamp can be powered either by a rechargeable battery (like 3.6V Ni-Cd) or a non-rechargeable battery (3.0V CR2032). The white LED...
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