Water detector circuit | ওয়াটার ডিটেক্টর This water detector circuit lights an LED when water stands in any surface. Don't let water stand. It is a habitat of aedes moquito and may cause dengue. Read More
DIY-Audio Amplifier | অডিও অ্যাম্পলিফায়ার Make an audio amplifier with LM386,resistors,capacitors, speaker, audio jack and battery. Gain of this amplifier is 20. Read More