STM32 16 Channel Relay Board
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This board was essentially designed as a prototype for a much larger product (64 channels).
The specifications were:
- Embedded STM32
- 16 channels
- 2A per channel
Videos
The board have been covered in multiple videos. The first is covering the complete design after the board was ordered at JLCPCB but before the product had been received.
Revision a
Schematics
The overall board schematic will be like this:
The relay channels are repeated 16 times:
The Flyback Diode is primarily there to protect the LED. From the LED datasheet:
So, more than 5V reverse, and the LED will break down.
