Mosquitoes are small bugs which are very annoying, as they also spread bad sickness like malaria and dengue; so this Ultrasonic Mosquito Repellent Circuit idea is to use high sound especially ultrasonic to above 20 kHz to scare mosquitoes. Ultrasonic sound can disturb them and make them go away, hence, this simple circuit makes that […]
Hobby Circuits
Simple Boost Converter LED Torch Circuit using IC MAX660
Simple Boost Converter LED Torch Circuit using IC MAX660 is small but useful light tool, as this project use MAX660 chip to make LED torch work well. MAX660 boost 3V battery to higher voltage and can light many LEDs, furthermore, it is good for battery devices needing more voltage and with no inductor needed. Also, […]
Simple 555 Timer Based Time Sense Tester Circuit
Simple 555 Timer Based Time Sense Tester Circuit is fun and easy to make, it uses IC 555 and make time delay, so press one switch and start timer. Then guess time presses second switch and it stop and then LED show result and it is good for learning how brain feel time. Also, circuit […]
Electronic Coin Toss Circuit using IC 555 and JK Flip-Flop
Many times people make choice by flipping coin, but this method is not always fair but sometimes it give biased result and therefore, to fix this we can use Electronic Coin Toss Circuit using IC 555 and JK Flip-Flop. It works like real coin flip using digital technology and LED. This circuit has two main […]
Metal Detector Circuit using IC CS209A
The Metal Detector Circuit using the CS209A IC is a useful tool for detecting nearby metal objects. People use it for security screening, treasure hunting and industrial applications, also this article explains a simple yet effective metal detector circuit based on a single CS209A chip. The circuit is easy to build and provides reliable metal […]
Canary Bird Chirp Generator Circuit
Canary Bird Chirp Generator Circuit is fun and easy circuit, it make sound like real canary bird chirping and it works like audio oscillator to copy bird sound. In addition, toys, sound gadgets and DIY projects use this circuit to generate sound effects and, also, a 9 V battery powers the circuit, making it easy […]