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Hi bojan,
I've had limited success with the USB LPT devices to do similar things in the past, as they sometimes just don't seem to match the old school way of hardware/addressing or something like that.
That last board you posted looks like the go, in my quick look, I could not find the API so to speak, so not sure on control.
Although, if you did it in Arduino + relays or other hardware, there would be a lot more flexibility on what you could do to it. For example, you could add input switches to give it stand alone operation without a PC and also use inputs as a way of detecting triggers, (micro switch etc). Use PWM to control motors, stepper motor control... I'm guessing you have no issues with coding, either way, I'll be happy to help out with code if you need a hand.
Keen to see what bits end up in the device.
Cheers,
Damien.
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