DIY Cruise Control on 07-08 Yaris (step by step)

[CTScott]

Originally Posted by scape

quick question on those momentary switches: I found a few at radioshack but they are low-amp rated (like .5A).. I noticed the referenced digikey switches are around 3 amps. what's the max rated amperage I should shoot for?

i found a few packs of resistors at the local radioshack, but none at 240. looks like i'll be soldering them together to make 240. they're rated at 5% tolerance, if combining them would the tolerance inherently go up?

Any momentary switch is fine. You are switching an analog input to a microcontroller, so the current is negligible.

For the resistors the tolerance means how far they can be off, so a 100 ohm, 5% can be 95 to 105 ohms. Since it is a plus or minus rating, chaining them together means that they can cancel each other out, or add to the percentage off in either direction. If you have a multimeter, you can measure the actual resistance of each.