A simple but very useful Zener diode tester

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

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.

Power your Eurorack modular synth with any USB-C power source.

Another electronic project.

Another small power supply circuit

Negative LDO based on TPS7A3301 low noise - 16 μVRMS drop in replacement for old LM79xx series.

A familiar circuit, but still useful.

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

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

he project is an electronic circuit for regulating negative voltage (Negative Voltage Regulators). This is a complete PCB project for stabilizing negative voltage, which includes a professional design of a printed circuit board (PCB) with all the files necessary for manufacturing and assembly. The circuit is designed to provide a stable and reliable negative voltage to electronic components, while protecting the system from voltage fluctuations. Suitable for use in analog systems, symmetrical power supplies, DIY projects and studying electronics.

PWM, (Pulse Width Modulation) is the most efficient way to control analog circuits using digital outputs, by changing the duration and frequency of the signal.

Differential voltage source at home.

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

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.