While I have no experience with the Phidgets board, looking at the docs and
the price, it really looks interesting.
My experience with the K8055 is interesting, I found it for $29.90 at "You
Do It Electronics," in Needham MA.
I was unable to get usb_bulk_read and usb_bulk_write to work on all
platforms. I had to settle for the usb_interrupt calls. The K8055 uses an
R/C circuit to take a 22KHZ PWM signal and make it an analog output. It has
only two analog inputs and two analog outputs. It has 8 digital outputs,
but only 5 digital inputs.
The 8055 also allows all the channels to bet set with one USB packet, this
is useful because it will allow a fairly efficient transfer mechanism to be
If you are looking for a Linux library, check out http://www.mohawksoft.org.
I have it in a CVS repository, and am integrating it into my sub-$500 robot
I would like to hear more about the Phidgets device.
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