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For this tutorial, we will use a LM7805 (a linear voltage regulator) for our power supply. What we are going to do, is build this power supply, with a couple of simple changes. This regulator needs a 0. 1 uF capacitor on the output side. . Voltmaster is a DIY battery pack made completely from scratch and can provide constant 5V to power all sorts of electronics devices or microcontroller setups. In order to charge and discharge the battery pack, we have used nine 3. 7V 2900mAh Li-ion cells that are all connected in parallel with a. . Convert just about any battery pack to 5V with VERTER - our fresh new Buck-Boost power converter. VERTER can take battery voltages from 3-12VDC and output a nice 5V DC, which makes it a perfect universal power supply for your portable project! Where Verter really shines is when you have a battery. . This circuit is a 12V to 5V regulated power supply with an LED indicator. It uses a 5408 diode for reverse polarity protection, an LM340T5 7805 voltage regulator to step down the voltage to 5V, and a push switch to control the LED indicator. The circuit also includes capacitors for filtering and a. . I have made a circuit which needs 5v to operate, I want to give 5v supply to that in portable and compact way. I didn't find any battery with 5v specs. . Whether you're powering a microcontroller, USB device, or a small sensor module, a stable 5V power supply is essential in almost every electronics project. In this guide, you'll find a curated collection of 5V power supply circuits, regulator modules, and practical DIY projects — from basic 7805. .