JEROME TOMSKI
FRANCE • + Follow
Description
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/
Schematic and Layout
Schéma électronique Charge USB 0-1A
ChargeElectroniqueUSBAde5Vjusqua1A_schema.jpg
Jul 17,2025
208 views
Adjustable 1A USB electronic load
2 Layers PCB 32 x 97 mm FR-4, 1.6 mm, 1, HASL with lead, White Solder Mask, Black silkscreen
An USB electronic load (1A), driven by ATtiny 824
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Published: Jul 17,2025
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