USB 5V to 1.5V/ 3V Step Down Converter Circuit
See USB 5V to 1.5V/3V Step Down Converter Circuit using LM317. With this, we can use MP3 players (requires only 1.5V AA battery) with USB(5V). Read more
Power supply
Simple transformerless power supply circuits
Learn these transformerless power supply circuits, use a capacitor instead, it smaller and lighter than transformer. There are circuits as follows. Read more
1.5V to 5V boost converter circuit for microcomputer
Small appliances have microcomputer that requires 5V power supply. Why it can use only 1.5V battery? The 1.5V to 5V boost converter circuit inside them. Read more
Microcontroller | Digital power supply circuit, 5V 3A using LM350 or LM323
See 5V 3A power supply circuit using LM323K or LM350 or 7805 by helping of the power transistor. For digital load, microcontroller, even raspberry-pi. Read more
12V 5V Dual Power Supply Circuit Diagram 3A max
This is 5v 12v dual power supply circuit using 2N3055 and Zener diode for 12V then to LM309 or IC-7805 dc regulator IC for 5V output which easy circuit […] Read more