I am new to the arduino and have been playing around with some of the simple codes like Blink and some of the others. I have written a few simple ones and am working on a pretty complex one... I have the Arduino UNO and am trying to us it to read a PIR sensor, light an led when it senses movement and use a photocell to detect if its day or night (if it's night then it will turn on a few IR LED's). So far I have figured out how to program the arduino to do all the above!! I am going to hook up a hackHD to the project yet and I have figured out how to put that on standby mode so it boots up quicker. The problem I am running into is what code to write to start recording with the camera. I want it to start recording as soon as the PIR senses movement. If I understand the hackHD correct all it takes is engauging the shutter/button a fraction of a second. It sounds simple but I'm stumped! Please help! Thanks and if you need more info I'll try to give it to you but remember that I am a beginner! :~
The "shutter" button connects between screw terminal 3 (Switch/Button) and screw terminal 5 (Ground). From this we can deduce that terminal 3 has a pull-up resistor to bias it to Vcc and it is activated by pulling it to Ground.
The instruction manual implies that you can connect +5V to the camera but that may be the +3.7V input only. A safe way to 'press' the button is to connect it to an INPUT on the Arduino and change that INPUT to an OUTPUT to pull the line LOW.