Automate 69 Posted August 26, 2012 Share Posted August 26, 2012 Since the C2000 LaunchPad is well suited for projects with motors and other devices connected to higher voltages, what is the best way to protect the inputs of the C2000 from accidentally getting a high voltage on them? Quote Link to post Share on other sites
msptest6 0 Posted August 26, 2012 Share Posted August 26, 2012 You can optocouple your inputs. Quote Link to post Share on other sites
Automate 69 Posted August 26, 2012 Author Share Posted August 26, 2012 I should have added Analog inputs. Imaging your working with a breadboard connecting jumpers with mV analog inputs but also have some high voltage stuff around. You don't want to fry your Launchpad when a stray wire touches the wrong voltage. Maybe a zener diode and fast blow fuse? Quote Link to post Share on other sites
TI_Trey 38 Posted August 27, 2012 Share Posted August 27, 2012 You could potentially add some clamp diodes between the analog input and the two supply rails. We do this on the larger controlCARDs but space was limited so we omitted these on the LaunchPad. The part we use on the F2802x controlCARD is NUP4201MR6: http://www.onsemi.com/PowerSolutions/product.do?id=NUP4201MR6 These will stand up to a little abuse, but they are really designed to protect the pins from ESD. If you put 50 volts on one of the LaunchPad pins you WILL fry the board. Automate and msptest6 2 Quote Link to post Share on other sites
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