I'm wondering if anyone can give me some direction on how to make my idea a reality.
I'd like to end up using two of the programmable pins on the Raspberry Pi (GPIO pins I suppose) to activate two of four possible signals that are sent out from my RC car's handheld remote simultaneously.
The car that it will control is one of those dual track type cars. The remote can make the left and right track go forward or backward at the same time (one speed only). To start, I only want to send one signal from one of the GPIO pins, and make one track go one direction (to make things easy).
To help understand I've snapped some pictures and took a reading. The remote, after taking it apart looks like this on the top:
And this on the bottom:
When I have it on, and place the voltmeter on it, I get a reading of 4.36 volts:
So my thought is that I should have something between the GPIO pins on the Raspberry Pi, and the J1-J4 headers on the remote's board. The remote control itself uses a 9V battery. Should I use transistors to convert the 3.3V signals from the Raspberry Pi to try and match the 4.36V that is running across the remote's switches?
For what it's worth, it seems like more fun to control the remote of the unit, rather than the RC car itself. Also could be done with items like wall outlet remote controls: http://www.newegg.com/Product/Product.a ... 6812820011.
Thanks in advance for anyone's thoughts or help. You can see my previous work with the Raspberry Pi here to get an understanding of where I'm at with this type of stuff... its nothing ground breaking, but I've been enjoying it: http://karlherrick.com/dev/category/raspberry-pi/