2
\$\begingroup\$

The pins that the arrows are pointing to are for the power button on my camera. If I take a small piece of wire and touch the two leads (they seem microscopic), then the camera turns on and off. I need a way to short these leads out so I can control power to the camera.

Two questions:

  1. Can I solder straight onto the button, or do I have to scrape back a little bit of the orange plastic?
  2. Is a Raspberry Pi capable of performing this function? That way I can setup a cron job to turn this camera on and off.

This photo is magnified with a helping hand magnifying glass, it is a very small button.

enter image description here

\$\endgroup\$
  • 1
    \$\begingroup\$ Does this flex go into a FPC connector? Sometimes it is easier to solder on the destination connector. \$\endgroup\$ – Joe Apr 17 '14 at 20:45
  • \$\begingroup\$ It might, but this camera is so compact, and my disassemble and reassemble skills are that of a novice, that I'm probably better off trying with the button above. \$\endgroup\$ – Pat Apr 17 '14 at 21:30
5
\$\begingroup\$

Yes, you should be able to use very fine wires, with a fine touch.

Do NOT attempt to scrape the Kapton in any way. I suggest you attempt to attach the wires on the opposite (top) side of the switch to avoid the traces. That would be the other two terminals of the switch.

Use really fine wire (AWG30 is about right), pre-tin the wire, and use a microscope and fine clean tip unless your eyes are very good. You could ruin your camera, of course.

The RPi should be able to do it, but how is another question. I suggest trying something like an optoisolator. An optoMOS solid-state relay would work (almost) for sure, but a cheaper optoisolator might work too (given the right polarity).

\$\endgroup\$
  • 1
    \$\begingroup\$ Arduino, Raspberry Pi, who can tell the diff anymore :P \$\endgroup\$ – Passerby Apr 17 '14 at 21:09
  • \$\begingroup\$ Great tip using the top side to solder to. My solder skills aren't the best. I'm hopeful I can tin the wire, then set in place and apply a slight amount of heat to get it to "stick". It may be novice, but would something like small bits of tape do the job instead? \$\endgroup\$ – Pat Apr 17 '14 at 21:31
  • \$\begingroup\$ @Passerby Dave Tweed, for one. Tks. \$\endgroup\$ – Spehro Pefhany Apr 17 '14 at 22:55
  • 1
    \$\begingroup\$ @pat no, tape will not make a proper connection. Use flux and solder! \$\endgroup\$ – Passerby Apr 18 '14 at 3:55
  • \$\begingroup\$ Get a flux pen if you don't have one before trying to solder. Make sure to put it on any old solder that your are trying to bond to. \$\endgroup\$ – Joe Apr 19 '14 at 0:17

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

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