Adjustable 1A USB electronic load
An example of an electronic load, allowing you to draw 0 to 1A from a USB port, so you can test it under load.
Control is via PWM, managed by an ATtiny 824 (programmed via UPDI). The program is written in C++ and can be uploaded via the Arduino IDE.
All the details here (calculations, code, tests, …): https://passionelectronique.fr/charge-electronique-usb-1a-attiny/
Adjustable 1A USB electronic load
Project images are for reference only. Actual production is based on the manufacturing files on the project page.
Please review the designer's notes (e.g., PCB thickness) and select the appropriate options.
PCBWay is not responsible
for issues caused by unsuitable parameter selections.
For more important ordering information, please refer to
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Raspberry Pi 5 7 Inch Touch Screen IPS 1024x600 HD LCD HDMI-compatible Display for RPI 4B 3B+ OPI 5 AIDA64 PC Secondary Screen(Without Speaker)
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JEROME TOMSKI
Mar 09,2026
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