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

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

A simple but very useful Zener diode tester

A compact and powerful USB power supply based on the XL4015 buck converter IC. Designed to deliver stable 5V up to 5A — perfect for powering Raspberry Pi, ESP32, Arduino, and USB gadgets.

Another electronic project.

40 Vac to 5 volt @ 600mA DC supply has resetable fuse and TVS to protect uCPU.

You can use up to 24 white LEDs.

PicoPD allows access to all USB PD 3.0 profile include PPS so that you can get the most current at any voltage out of your new USB-C charger

I made a small DC-DC power supply for prototyping, projects, assembly and electronic experiments.

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

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.

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

Tester circuit for LEDs

For driving Cockroft Walton Multiplier I use stable high voltage source which I made with minimal modification of the old PC power supply. With this setup I achieved a constant spark from more than 30cm and a periodical sparks at a distance of more than 35cm.