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Scarr said:Even better is there a MCU with a pin that can be configured as open-collector?
Scarr said:Hi all,
Thanks for the help so far
EricGibbs, I have attached a quick circuit (just hope I got it right!)
Nigel, Do you know of a small Ateml part of the top of your head that has a open drain pin? reason I ask is my compiler is for Atmel parts, I probably could port it but if we find the correct transistor might not be worth the hassle. and to trawl throught all the PDF's would take ages.
Auido Guru, your suggesting it's the transistor I'm using thats at fault and with my limited knowledge I can see why (however I originally thought it was due to limitations of the transistor) can you sugest a replacment?