4

I'm working on David Hunt's Touchscreen Pi Timelapse Controller (https://learn.adafruit.com/touchscreen-pi-timelapse-controller/overview) and have encountered some difficulty in the the hardware section of the instructions. I have a Raspberry Pi B+.

He specifies to connect to GPIO17, but this is being used by the PiTFT Touchscreen, which uses pins 1-26. I don't see another 3.3V power source that is not covered by the touchscreen. Is there a way to connect to GPIO17 with the Touchscreen on, or a way to get the power from another pin?

I'm really new to RasPi, so would appreciate some advice. Thanks!

1 Answer 1

3

The 3V3 rail is only brought out on pins 1 and 17.

Your only choices appear to be

  • an external 3V3 power supply (but then you'd have the same problem connecting the grounds)
  • to carefully splice one of the 3V3 wires
  • to carefully solder an insulated wire to pins 1 or 17 on the underside of the board

EDITED TO ADD

There is another option

  • If the device needs only a little current at 3V3 (say 10 mA) use any accessible gpio and set it high.
1
  • Thank you- I'll try either option 3 or 4 and see how things go.
    – Nathalie
    Jan 16, 2015 at 19:34

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.