Any way to power on Pi with MoPi when Vin>6.2V?

hamishcunningham / pi-tronics

Source code for Raspberry Pi GATE projects.

http://pi.gate.ac.uk/

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Any way to power on Pi with MoPi when Vin>6.2V? #33

Closed wayner9 closed 9 years ago

wayner9 commented 9 years ago

I see that there is a timer included with MoPi that will wake up your Pi at a specific time. Is there any way to do this by Input Voltage rather than time? It would be nice to have a solar powered unit that can shut down when the light is insufficient but that can then come back up when there is suffficient light to generate > 6.2V.

wayner9 commented 9 years ago

Bump - is this possible? It would be great functionality to have, especially when one has a project running from solar or solar charged batteries.

hamishcunningham commented 9 years ago

A circuit like this one should do the trick: https://www.circuitlab.com/circuit/shevrt/in-car-mopi/

I blogged a bit about this here: https://pi.gate.ac.uk/posts/2015/02/11/in-car-mopi/

HTH, best

Hamish