Red LED on PicoBorg Reverse

Submitted by Marco on Thu, 03/12/2015 - 10:54

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Hi!

What is the meaning of the red led on the PicoBorg Reverse? Mine is sometime on for a few seconds

I power the Raspberry Pi and the PicoBorg with the same 24V power supply in parallel and using a stepdown for the Raspberry

Could it be caused by a problem in the wiring or the power supply?

Thanks!

piborg's picture

piborg

Thu, 03/12/2015 - 12:29

The status LED does two things:

  1. During start-up it should blink on then off for about half a second to indicate it is ready to run
  2. After the initial blink it is available for software control using the PBR.SetLed function

The LED and the controller on the PicoBorg Reverse get their power from the 3v3 pin of the Raspberry Pi GPIO.
This should be a steady voltage, if not the Raspberry Pi itself would also be experiencing problems.

In most of our examples we include the following line somewhere:
PBR.SetLed(PBR.GetEpo())
This makes the LED come on if the EPO pins are disconnected.

Do you have an EPO switch fitted, or do you have the jumper attached over the two EPO pins?

Marco

Thu, 03/12/2015 - 17:32

Actually I was using a switch and a pull up resistor connected to a gpio pin of the Raspberry and I was using the 3v3 pin of the PicoBorg as a VCC but there was a small short circuit between the resistor and the ground which was causing (I guess) the PicoBorg to reset :/ Anyway now I've isolated all the circuit and it's working great! (well except for the gpio pin which is dead :( )

Thank you

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