ionas Posted January 26, 2012 Posted January 26, 2012 Hi! I´m finally building my own LPC 17. I´m not unexperienced in soldering so i followed the guide on the ucaps page. The resolution of the pictures is very low so i don´t know, where to measure the 3,3 V. I tried to guess but i only got the full 5V … Here´s my build: LPC 17 Thanks for helping!
peterpressure Posted January 26, 2012 Posted January 26, 2012 Well I am a little ahead of you, but it is actually very simple. From the build page: Note that USB Power Jumper J17 has to be removed when the core is supplied externally via J1! Plug in the USB cable, and mount the "USB Power" jumper on J17. Measure 3.3V between GND and the 3.3V supply pins to the LPCXPRESSO module. Here is the LPCxpresso schematic in this PDF: http://ics.nxp.com/support/documents/microcontrollers/pdf/lpcxpresso.getting.started.pdf You are looking for VIN, I believe it is J6_2 on the LPCxpresso board. Any ground should do.
ionas Posted January 26, 2012 Author Posted January 26, 2012 Hey there! (nice pic by the way :-) ) i guess i made it. (see there: https://skitch.com/ionas-elate/ghdrm/img-1409.jpg) and it says around 3.3 (luckily) but it fluctuates pretty heavily … but i think thats because of my shitty multimeter … thank you!
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