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This project is based on an infrared (IR) sensor, which detects the presence of hands and consequently activates the motor pump to dispense alcohol-based sanitiser. The circuit is economical, reliable, and can be easily constructed, as explained below. Circuit and...
Most microphones’ output signals are weak and cannot be directly connected to some other circuits. Also, some microphones require DC power supply or high impedance inputs. Here is a dual (stereo) preamplifier for microphones that can be used with...
The circuit presented here is a simple device to enhance the utilisation of hot water from a solar water heater system. Normally, during day time, you get hot water continuously from the solar water heater due to the presence...
Arduino board requires a USB cable connected to a laptop/PC or an external AC/DC adaptor for power supply. If you want a portable Arduino based project, you need a battery for power supply. 9V PP3 is a popular battery...
This Wireless Remote Control project is based on Yoda with an adapter and Arduino Nano. Electrical appliances (like fan and lights) can be controlled wirelessly using an RF remote. This Project describes an Arduino based wireless Control appliances from Yoda...
This project demonstrates how you can build a real-time clock (RTC) with a temperature display using Arduino, DS3231 RTC chip, and SSD1306 OLED display (128Ă—64 pixel). DS3231 RTC chip is more accurate than DS1307 and also has a built-in temperature...
The circuit presented here is compact and handy for measuring the voltage rating of a Zener diode instantly. To check a Zener diode, it is connected across a DC power supply with a suitable resistor in series, then the...
Certain shortcuts on your keyboard such as copy, paste or print can definitely simplify your work. And what if you can create these different keyboard operations on your own? Have you ever thought about this? This simple DIY project explains...
The conveyor jam detector circuit presented here is designed to activate an alarm device or programmable logic controller (PLC) when the speed of the conveyor system falls below the set minimum speed, alerting the workers the possibility of jamming...
This solar day lamp with battery backup can be used in offices, homes, shops, warehouses, temples, etc. It offers a cost-effective way of harnessing solar energy. It is simple to manufacture and has a long life. The basic solar day...