DIY Cruise Control FAQ (2006-2010 Yaris)

[CTScott]

Originally Posted by bobor

Hi CTScott,
thanks for your response. I admit its time consuming process and there are many risks to consider, but it's my hobby At the moment I would say I have 90% of the source code ready, so there are only minor modifications to be done and a lot of testing and bug fixing But except my free time I invest into it, the parts will cost me not more than 20 EUR ( ~30USD).
Regarding the aftermarket models, the situation is slightly better than you expect, at least here in Slovakia. I can get one for ~450 USD, but still Rostra model even including shipping costs would be cheaper. And I don't see any reason why it should not work on European models.

But as I said, it's a hobby.

OK. In that case, back to your original question - I would not use mechanical relays. I would stick with solid state switching, by transistor or FET, to avoid the switching delays.