Since you've asked me about my LPCXpresso before, I'll take that as permission to make suggestions. I just wanted to let you know that there is a small issue on the board due to poor documentation of the LPCXpresso. Currently you have jumpers to select various 5V lines to go into the LPC_VIN pin. Unfortunately, that pin is not used on the "main" side of the LPCXpresso. That pin simply connects to the LPC-Link (the attached debugger) which sends 3.3V back. So if you remove the debugger the LPC_VIN pin is no longer attached to anything since there's no on-board regulator, and the board can powered only by putting 3.3V on the LPC_3V3 pin.
Whoever wrote the LPCXpresso datasheets should be soundly beaten for not making this clear--I spend a good three days thinking my board was a dud, and I am surely not the first to fail to understand this.
Hi Bob,
Since you've asked me about my LPCXpresso before, I'll take that as permission to make suggestions. I just wanted to let you know that there is a small issue on the board due to poor documentation of the LPCXpresso. Currently you have jumpers to select various 5V lines to go into the LPC_VIN pin. Unfortunately, that pin is not used on the "main" side of the LPCXpresso. That pin simply connects to the LPC-Link (the attached debugger) which sends 3.3V back. So if you remove the debugger the LPC_VIN pin is no longer attached to anything since there's no on-board regulator, and the board can powered only by putting 3.3V on the LPC_3V3 pin.
Whoever wrote the LPCXpresso datasheets should be soundly beaten for not making this clear--I spend a good three days thinking my board was a dud, and I am surely not the first to fail to understand this.