External Power Problem

A 40 Pin Dip packaged development board enabling you to create internet connected products

External Power Problem

Postby wpfundstein » Tue Nov 04, 2014 12:58 pm

Hi,

1. if i use a powersupply with micro usb on the wifi-dipcortex it does not work. it powered up only if i connect the USB cable to my pc.

2. if i use external power on pin 32 (+5V) und pin 31 (GND) the module also does not powered on. if i connect external power on this pins i have 3.3 V on pin p11. so i think the regulator works.

any ideas?
wpfundstein
 
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Re: External Power Problem

Postby Carl-SolderSplash » Tue Nov 04, 2014 1:42 pm

Hi,

If you can measure 3.3v on the 3.3v pin when you apply 5v the regulator is working and so should the processor.

I would eliminate the software, use a simply blinky application to just flash the led to show the micro is running.

The USB vbus is the 5v net so there should be no electrical difference
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Re: External Power Problem

Postby wpfundstein » Tue Nov 04, 2014 3:10 pm

Grazy. After removing the lib USBDevice it works.
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