PC817 Optocoupler Tester
The PC817 optocoupler IC has four pins, 2 pins are the LED pins and the other 2 pins are the photo transistor collector and emitter.…
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PC817 and IRF1405 Based DC Motor Driver Circuit
Do you want to safely control a 12V DC motor from a low power signal voltage, such as a microcontroller or other IC? This simple…
Simple Audio Amplifier Circuit Using 2N3904 and BD139 Transistors
Building amplifier is not complicated task. You can easily build amplifier using a single BD139 transistor. Hear i am sharing my project of simple audio…
Subwoofer Test Tone Generator Online
If you’re testing subwoofers, tuning car audio or exploring low frequency audio this subwoofer tone generator will helps you. Experience the power of deep bass…