lpcware

bug/suggestion for EA lpcxpresso baseboard

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by sravet on Fri Jun 10 08:20:53 MST 2011
I posted this in a reply to another thread but I thought I'd put it in it's own thread.  I want to power the EA baseboard externally from a 7.4v LiPo battery.  VIN has it's own pad, plus is isolated from the USB power supply, so I assume that is where external power is applied.  The problem is that VIN directly powers the RS485 transceiver and the common anode of the RGB LED, and the transceiver in particular has a max VCC of 5.4 volts.

Is there a regulated 5V supply on the board?  I didn't see one but didn't look that hard.  If not then maybe the fix is to power the LEDs and the transceiver from VBUS1 or VBUS2.

thanks,
--steve

Outcomes