Thread: CIM->Victor 884->Arduino not working
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Unread 17-01-2013, 16:24
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Re: CIM->Victor 884->Arduino not working
Quote:
Originally Posted by jamie_1930 View Post
Next time i'll try putting a larger resistor in line to lower the current down to 50mA
50 ma is still way too high.

In the Jag's opto-isolator, there's a 150 ohm series resistor. In the DSC, there's a 330 ohm series resistor in the PWM signal output. Total 480 ohms. Do the math. 11 ma should be enough.

I just measured a Vic I have here. With 1.5 VDC applied to the input, the current is 0.00562 amps. Subtract 0.7 volts for the LED (I think?) and use R=V/I = (1.5-0.7)/0.00562 = 142 ohms series resistor. So it seems to be similar to the Jag.