Tuesday, May 24, 2022

Serial LCD Module

In most electronic systems, it is necessary to provide information in the visual form for a convenient user interface. The most commonly used displays in electronic systems are LED, LCD and...
Relay Actuating

Relay Actuating Circuit with Millivolt Sensitivity

Common electromagnetic relays with coil voltage of 5V, 6V or 12V can operate power circuits in the range of 250 to 300 volts and up to 20A. The actuating current of...
Raspberry Pi GPIO

Raspberry Pi GPIO Access Using C

It has almost been 40 years or more and still C language is ruling the world. Also, it has been the first choice of embedded engineers. It is simple to learn...
USB camera on raspberry pi

Capturing Images with USB Camera, Wi-Fi and Raspberry Pi

Ever since this tiny, credit-card-sized computer, Raspberry Pi, appeared in the market, it has caught the imagination of every electronics and computer hobbyist around the world. The powerful Linux operating system...
Circuit diagram of dual audio level shifter and buffer

Dual Audio Level Shifter and Buffer for ADCs, MCU Kits and Arduino

Many single-ended analogue signals do not have DC components or appropriate DC offsets. Due to that, these require very high input resistance for analogue-to-digital converter (ADC) inputs. This simple universal dual...

IoT-Based PM2.5 and PM10 Air Quality Monitoring System

This is an ESP32 NodeMCU-based Air Quality monitoring system to check particulate matter (PM), humidity, temperature, altitude and pressure levels. Various environmental conditions of the place are tested and displayed on...
wireless extender

Wireless Extender For IR Remote Controls

Using this system, you can control your IR-remote-controlled home appliances like DVD player and air-conditioner from another room without the hassle of running extra cables between the two rooms.

Battery Deep Discharge Saver

This circuit can be used to ensure that a 12V sealed lead-acid battery does not go into the condition of deep discharge. The circuit disconnects the battery from load when its...

Dual-Channel Active AC Analogue Probe

Presented here is a low-cost, dual-channel, active AC analogue probe. It is suitable for oscilloscopes, multimeters and other analogue measurement equipment. When experimenting with AM receivers for long, medium and short waves,...
USB Controlled Power Switch

Automatic USB-Controlled Power Switch

Almost all electronic gadgets now come with one or more USB ports. You can use the USB port as an automatic switch to control devices powered by mains. Here we present...

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