I hope this is a simple question...
I am a visual artist and I embed digital photo frames to play videos in my sculptures. The problem is, is that no digital photo frames that I can find play video right away on start up...you always have to press a series of buttons to get the video going.
What I did in the past is just soldered onto the buttons and extended them so that you didn't have to reach into the sculpture to press the button and get the video going. But I'd like to use an Arduino to send a signal to the button to press it. So say I need to press one button, wait a few seconds and press it again, is this is simple as making a digitalOut and setting it to HIGH, delaying, set it to LOW, then setting it to HIGH and LOW again? Would it be even easier(cheaper) to just program a smaller AVR chip to do this, if I really wanted a bare bones setup? There's probably some stuff with voltage that I don't understand so anything you can help me with is much appreciated!
Thanks so much for any feedback!
Yes it is conceptually as simple as that. However because of possible voltage differences and unknown circuit details for the digital frame device, it's often simpler to have the arduino turn small relays on and off with digital commands and wire the relay contacts across the devices' switches. That way there is no need to know the voltage, current value or polarity of the frames button circuits. One relay for each switch you have to control. Here is an example of a small +5vdc relay that an arduino output pin can drive directly. http://www.allelectronics.com/make-a-store/item/RLY-541/5-VDC-SPST-N.O.-DIP-REED-RELAY/1.html
One should wire a reversed biased diode across each relay coil for transient protection.