I'm currently circuit bending an original Nintendo Entertainment System (the one from the 80's). For those unfamiliar with circuit bending, it's basically when you expose the circuit of a device and create short circuits in arbitrary places in the hope of corrupting it's functionality. Commonly performed on cheap, battery-powered kids audio toys. It requires no experience in electronics to start 'hacking' at an elementary level, which, unfortunately, is the category i fall into You flip the circuit board over so all you see are the solder blobs, and use crocodile clips (or jumper wire) to connect various 'blobs' together, therefore forcing a change in the circuitry, and often resulting in crazy outputs! Kids toys can end up screaming with distorted, alien voices... it's very fun.
So i've been applying this methodology to the NES. When i connect certain points together, the image glitches, see an example here: http://www.art-rash.com/pixelform/videobends/NES/images/nes-build-010.jpg The standard practice would be to connect two 'bend points' together using a physical SPST switch, so the glitch can be turned on and off.
But I'd like to control these switches from a Max/MSP patch, using an arduino.
I've been researching this like mad, and was initially advised down the route of using a relay switch. But the more I read, the more it seems like a transistor is the tool I need! I would use a digital pin from the arduino (in output mode) to send +5V to the transistor, therefore closing the switch and activating the glitch. Does this sound like the right idea?
I know this is probably an extremely basic circuit, but could someone help me with the schematic? And also the correct transistor to use, along with any other necessary components?
I have vague ideas of how to go about setting this up, from what i've read. But i'll omit them just now, so I don't confuse things.
I realise it's frustrating dealing with someone with limited electronic knowledge, but I'm willing to listen to/read/learn whatever is required to make this happen! It's probably so simple, but I really couldn't find anything online about using arduino boards to activate bend points on circuit bent instruments.
(PS originally posted in the Hacking section, but prob more suitable here)