Thread: servo control vs stepper control
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14-09-2012 #15
Last Activity: 17-03-2017
Originally Posted by boldford
Ok, so 5mA collector current on 5v, 24mA on 24v.. so it wont fry :)
EL817 optos are rated 35v, 50mA so should be ok.
However, as I recall the diode has a 330R series resistor so forward current is about 10mA and those devices have a transfer ratio of about 1.1. So with 10mA in the diode the collector current is going to struggle to be more than 11-12mA which means the output volts wont drop below about 12 - 13v, so though it won't fry its not going to work. No good on 24v :(
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