Power your outdoor electronics with this compact and smart 18650 solar charging PCB! Designed for low-power IoT projects like ESP-based sensors or automation nodes, this board combines a TP4056 charging module (with integrated undervoltage protection), a TPS61023 5 V boost converter, and two optional switches for flexible power management. The board runs from up to five 5V solar panels and supports one or two 18650 Li-Ion cells. Ideal for garden sensors, smart weather stations, and other mobile DIY projects. For full assembly instructions and detailed specs, visit: https://smarthomeyourself.de/18650-solar-platine This is a non-commercial community-driven design. Feel free to build and share it! ????️ Components & links below

Differential voltage source at home.

AMAZING DIY DESKTOP CHARGING STATION.IT IS MINI IN SIZE,BUT IYT HAS POWER LIKE MONSTER.

It's a voltmeter that indicates battery status, more precisely the value of the voltage battery.

You can use up to 24 white LEDs.

Double voltage source +15V / -15V and +5V / -5V stabilized

Another electronic project.

A simple and relatively inexpensive way to make an efficient DRSSTC (Dual Resonance Solid State) Tesla coil.

DIY High Performance & Fully Protected 300W Stereo Class D Amplifier using TAS5630B for your Active Speaker or High Power Bluetooth BomBox.

The Open Source Fusion USB 3.0 Charge Pro is an all-in-one keychain tool for secure and efficient USB charging. It features a USB Power Meter to monitor charging, a Cable Tester to check cable integrity, a USB Condom for data protection when charging in public, and a Power Splitter to charge multiple devices from one port—all in a compact design.

Practical flyback tarfo power source for prototyping various HV devices, considering that it can work continuously for a long time without heating up, it does not require much knowledge to make it, and its cost is very low.

A familiar circuit, but still useful.

Buying a ready-made power supply would be too easy, so I decided to make my own.

Monitor for equal voltage at the terminals of two 12V batteries.

Tester circuit for LEDs

Battery charger with BD-type transistor