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Beginners Projects

Low-Cost Tachometer

From drones to smart cars, from lifts to industrial robotics, all use an important device: a motor or rotating gear. For reliable, robust and...

Furnace High-Temperature Monitoring and Logging System

Measuring and monitoring temperature above 200℃ to 1000℃  is a highly difficult task, especially when you want to carry it out digitally because most...

Long Range Audio Spy Device

Bluetooth-based spying devices can help you eavesdrop on someone, just like in James Bond movies. But Bluetooth and also WiFi have a very low...

Microwave Radar Based Electric Shock Protection

When it comes to the safety of children near electric sockets at home, many cases of accidents occur due to electric shocks. Although protection...

Visitor Counter Using RGB APDS-9960

We have heard of events/parties going out of control due to gate crashing by uninvited guests. Now, as a solution, imagine your door counting...

Single-Channel Audio Amplifier

Here is a simple single-channel audio amplifier that can be made using IC LM380N. As per the datasheet, LM380N delivers an output of 2.5...

Milliamp Meter For 1mA To 100mA

Low-current measurements are generally not reliable due to resolution of the measurement devices, which are mainly meant for measuring a current of a few...

RFID Contactless Lock

When it comes to security, RFID card-based digital locks are more reliable than key-based mechanical locks since they cannot be easily broken also they...

Touchless Doorbell For The Post-Covid World

This low-cost, simple, reliable, and effective circuit for a doorbell works without touching. It can be quite useful in our post-Covid-19 world as it minimises...

Simple Shortwave Voice Transmitter

This simple shortwave transmitter is easy to construct and can be used to transmit speech on the lower shortwave (SW) band of 5MHz to...

Arduino-Based Compact DIY TDS Meter

Total Dissolved Solids (TDS) is a measurement for detecting the potability of water. Both humans and aquatic creatures require a suitable level of water...

Tricolour LED Nameplate With Arduino

Nameplates are generally made of wood, acrylic sheet, or a metal and fixed on a wall or kept on desk. The author’s prototype of...

Android Application For Multi-Sensor Data Monitoring

This Android-based project can monitor on-site (field) process data sensed by two temperature sensors and display the temperature (in degree centigrade) on a smartphone....

Little LiFePO4 Battery Charger

This circuit of single-cell LiFePO4 (lithium iron phosphate) battery charger is based on an LM358 operational amplifier (op-amp) and a couple of inexpensive and...

Stereo AF Amplifier Using TDA1517

Here is a simple stereo audio amplifier that can be made using a TDA1517 IC. A 14.4V regulated voltage is used as power supply...

Power Bank Based Linear Regulated DC Power Supply

This circuit uses power bank and DC-DC booster module not only for charging mobile devices but also to provide 1.2V to 37V DC power...

Rotating-Wheel LED Lights For Decoration At Functions

This circuit produces a rotating-wheel like LED lights pattern, which can be used to decorate public halls during parties, festivals, and marriage functions. The...

Simple 5W Stereo Amplifier For Noise-Free Music

This simple stereo audio amplifier is based on a 12-pin TA8207K IC, which is inexpensive and easily available. In addition, it requires only a...
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