cheekymonkey Posted September 17, 2007 Share Posted September 17, 2007 Hi All Have just picked up a Velleman PIC experimentation kit to learn about these little devices and have been thinking about using one to control various aspects of the car. I am basically after general advice on how to interface a device with ~5v CMOS type outputs to 12v low current type systems in the car. Example - say my headlights are controlled by a relay that uses 12v to switch over (well, I imagine they are) and I want the PIC controller to control this. I don't really want to use another 5v relay to control the 12v, that would suck! I have extremely vague memories from school about transistors being able to act as little relays or switches but most of the info I can find on the net regards using them as amplifiers. Can anyone shed any light on this for me? Cheers! James Quote Link to comment Share on other sites More sharing options...
Hermit Posted September 17, 2007 Share Posted September 17, 2007 Here ya go... http://www.rason.org/Projects/transwit/transwit.htm Quote Link to comment Share on other sites More sharing options...
JustGav Posted September 17, 2007 Share Posted September 17, 2007 If you are just using the 5v's a digital on/offs.. Why not use 5v solid state relays, then you would not need the transistors or the 12v relay at the other end. Quote Link to comment Share on other sites More sharing options...
cheekymonkey Posted September 18, 2007 Author Share Posted September 18, 2007 If you are just using the 5v's a digital on/offs.. Why not use 5v solid state relays, then you would not need the transistors or the 12v relay at the other end. Ooo! That's an idea mate, I completely forgot about those babies. Worth considering, cheers..... Quote Link to comment Share on other sites More sharing options...
cheekymonkey Posted September 18, 2007 Author Share Posted September 18, 2007 Here ya go... http://www.rason.org/Projects/transwit/transwit.htm Perfect, can always count on those radio HAMs... unless that's his car reg... Quote Link to comment Share on other sites More sharing options...
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