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

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

Battery charger with BD-type transistor

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.

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

Another small power supply circuit

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

This circuit is made for a DIY builder, I left enough room for a heat sink. for the filter capacitor.

Another electronic project.

A familiar circuit, but still useful.

This universal power supply board is a perfect match for powering the low power devices such as MCUs, Sensors & Modules with the best load and line regulation features. The board can take an AC or DC input of as low as 8V and as high as 28V to provide a multiple DC output voltages like 3.3V, 5V, 12V, variable DC output, and the output same as the input. The maximum load regulation is measured to be 60mV and the maximum line regulation is measured to be 0.2%/V.

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.

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

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

A pure sine wave inverter is a critical device. The highly efficient 12V/24V/48V pure sine wave inverter converts the DC power stored in the battery into standard household AC power, providing you with quiet AC power anytime and anywhere. Sine wave inverters are commonly used in a variety of applications, including off-grid or backup power systems, RVs, marine, and renewable energy installations.

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