DIY: Motion Based Powersaver
Energy conservation begins at home. Many times, we tend to forget to switch off electrical appliances when not in use. This not only results...
DIY: Wireless Power Case For Raspberry Pi
Earlier, we made a futuristic wireless tile called Smart PowerTile that allowed home walls to wirelessly power electronic/electric devices, similar to a MagSafe. With...
Pressure Regulation System for High and Low Air Pressures
Here we designed a smart Pressure Regulation System using Arduino and a Pressure sensor.
Maintenance of fluid pressure is critical in factories. While high fluid...
Smallest Open-Source Function Generator
A function generator is an essential equipment used by design, and test and measurement engineers as well as DIYers. Most of the function generators...
Homemade Laptop Using Raspberry Pi
The laptop has now become one of the must-have items everyone should own.
Today different varieties of laptops are available in the market, with different...
GSR Based Lie Detector Device
Speaking the truth is crucial for reaching an amicable conclusion in law courts and several other scenarios related to receiving justice. But not everyone...
Finger-Sized Portable Voltmeter
From electronics/electrical engineers to product developers, one device that is essential for electrical testing needs is the voltmeter and if you are an electronics...
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...