Air Puff Controlled LED Circuit is fun and easy project to make. We we blow air the LED turns OFF. It is used in no-touch controls, fun devices and displays. Main part is electret mic which hears our puff. Mic triggers transistor and transistor turns OFF the LED. It works with small power like 3V […]
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. 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 parts: In […]
Metal Detector Circuit using IC CS209A
Metal Detector Circuit using IC CS209A is a cool tool to find metal near by. It is used for security, treasure hunt and in industries. This article shows simple but strong circuit using one chip called CS209A. It is easy to make and works great to detect metal. We can find metal from few inches […]
Canary Bird Chirp Generator Circuit
Canary Bird Chirp Generator Circuit is fun and easy circuit. It make sound like real canary bird chirping. Works like audio oscillator to copy bird sound. Circuit is used in toys, sound gadgets or DIY projects. It runs on 9V battery so anyone can use it easily. Circuit Working: Parts List: Component Specification Quantity Resistors […]
Jet Engine Sound Generator Circuit using IC HT2844P
Jet Engine Sound Generator Circuit using IC HT2844P is fun and learning project. It makes jet engine sound using simple parts. It uses IC HT2844P sound chip to make real jet noise which is good for model fans, school work or DIY fun. Circuit needs 3V power and keeps under 3.3V or else circuit may break. […]
Subwoofer Low Pass Filter Circuit using Op-Amp TL062
Subwoofer Low Pass Filter Circuit using Op-Amp TL062 that let low sound go and block high sound. This circuit is good for subwoofers which gives deep and strong bass. The circuit uses TL062 op-amp which is active for low pass type. It cut high sound and keep bass clean and loud. TL062 IC from ST […]