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by SomeGuy42
Fri Aug 08, 2014 9:11 pm
Forum: General discussion
Topic: The Raspberry Pi Model B+ Q&A thread
Replies: 388
Views: 185083

Re: The Raspberry Pi Model B+ Q&A thread

rpdom wrote: No. There is no ADC on the power input. There is a simple circuit that turns the LED off below about 4.63V. That is all.

You can however monitor the LED status by checking the value of GPIO 35 (1 = on=normal voltage, 0 = off=low voltage)
That will work for me. Thank you very much for the info.
by SomeGuy42
Thu Aug 07, 2014 9:31 pm
Forum: General discussion
Topic: The Raspberry Pi Model B+ Q&A thread
Replies: 388
Views: 185083

Re: The Raspberry Pi Model B+ Q&A thread

jdb wrote: Note that the PWR LED is now connected to an undervoltage supervision chip. The PWR LED will flash (or go out) if the PSU voltage drops below ~4.63V.
Is there a way to read input voltage with 'vcgencmd measure_volts' or something similar?

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