Thread: Robot Controller Digital Input
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Unread 15-02-2003, 06:51
dave_l dave_l is offline
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Join Date: Feb 2003
Location: Lakota East HS
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active interface to DI?
I *REALLY* want access to the Switch 1/2/3 LEDs on the operator interface.

I have _some_ electronics knowledge, and suspected that the DIs are open collector inputs with a pull up resistor.

I am wondering how involved it would be to use say an NPN (ie current sinking) switching transistor with one of the relay outputs to switch one of the digital inputs?

If possible, I would then use some of my unused relay outputs to control DI 1/2/3 and hence the three LEDs on the OI.

Can any electronics gurus out there suggest a simple circuit?

Thanks