QRP is word in ham radio which means to send signal with low power and it come from Morse code. ‘QRP’ say “lower your power” and this QRP use power rules like: Also, Simple QRP Antenna Tuner Circuit for RF Applications help send signal better and it connect low power radio to antenna. Then tuner […]
Designing a UJT-Based Audio Tone Generator Circuit
Designing a UJT-Based Audio Tone Generator Circuit is easy and fun and it makes music sound like small instrument, also it use UJT as relaxation oscillator. Push buttons change frequency with different notes and then sound goes to speaker after amplifier., so press button, tone change and UJT 2N2646 will make right frequency and then […]
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 […]
Air Puff Controlled LED Circuit
The Air Puff Controlled LED Circuit is a fun and easy project to build and when we blow air onto the microphone, the circuit turns the LED OFF. This circuit is useful for no-touch controls, interactive devices, demonstration projects, and display applications. Main part is electret mic which hears our puff and then mic triggers […]
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 […]