G gelecg New Member Apr 13, 2013 #1 Hi, Which one is better? is The diode in second circuit effect to reduce noise? and the switch is connected with 20 meter wire. Last edited: Apr 13, 2013
Hi, Which one is better? is The diode in second circuit effect to reduce noise? and the switch is connected with 20 meter wire.
ronsimpson Well-Known Member Most Helpful Member Apr 13, 2013 #2 I do not understand the diodes at all.
JimB Super Moderator Most Helpful Member Apr 13, 2013 #3 I agree, that diode configuration is not sensible. JimB
G gelecg New Member Apr 15, 2013 #5 thanks. someone protecting port with optocoupler. why we must isolation with optocoupler?
alec_t Well-Known Member Most Helpful Member Apr 15, 2013 #6 If you are measuring signals from equipment which may be at mains potential or higher you would isolate the micro (and yourself!) from that.
If you are measuring signals from equipment which may be at mains potential or higher you would isolate the micro (and yourself!) from that.