Hello,
I need to make a simple circuit to remotely trigger this camera.
http://s1183.photobucket.com/user/mneme ... 3.jpg.html
Based on what I observed with my multimeter, the button on the camera is connected to "KEY" and "GND". A multimeter reading across the GND and KEY tabs pulls the signal from KEY from 3.3v to ground. I want to expose the ground and signal tabs from the button, and use an external signal to trigger the button press.
My problem is that the external signal goes HIGH instead of pulling low. It's a 3.3v output from my microcontroller.
How can I create a simple circuit which, when my microcontroller output pin goes to high, it pulls the KEY signal on the button to ground? (Ideally, in a simple and size efficient manner-- so not using a mechanical relay).