How to pulse a signal at 100ms to 500ms? Based on this PDF I need to pulse between 100ms and 500ms to record a video (the description is apparently wrong according to this guy). How would I generate such a pulse? The small module has 3 wires I can use, which are positive, ground, and a yellow wire. I assume I need to pulse the yellow wire.

I don't want to hook anything up wrong, but my guess would be using pulseIn(). However, I am not sure at all. Any help appreciated.
Okay, so pulsing is apparently easy enough. If I just do:

digitalWrite(13, HIGH);
delay(1000);
digitalWrite(13, LOW);
delay(1000);


It will start recording, then turn off about a second later, start again about a second later, and then repeat. I somehow managed to get a 5 second recording as well. I'm not really sure how this is supposed to work. I need to test some more.

EDIT: Turns out the schematics were right. If I do something as simple as:

digitalWrite(13, HIGH);
delay(500);
digitalWrite(13, LOW);
delay(1000);


It will turn on the video recording and turn off whenever it gets HIGH again.