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10 years, 7 months ago.
External power
When I power the EA LPC11U35 QuickStart Board from a computer USB port everything is fine.
But when I power it with a 5V battery pack it does not boot. Only the green USB LED lights up. That also happens when I power it from a USB power supply.
So it only works when powering it from a real computer USB port. What could be wrong?
Edit: It was my fault because I used USBSerial which blocks the program before reaching main().
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Last updated: 07 Nov 2019
The LPC11U35 QuickStart Board from Embedded Artists is a easy to use ARM Cortex-M0 rapid prototyping board in a breadboard-friendly 30-pin DIL format. The board targets smaller control applications as …
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It does look like the board lacks protection diodes on 5V, so you can have external power or USB, but not both.
posted by geoffrey brown 28 Jan 2015