In SX Microcontrollers, SX/B Compiler and SX-Key Tool, ringlord wrote:

Bean and Johnnymac--

You must have read my mind . . . er, BS2 experience! BOTH of you are correct.

I WOULD have hooked it up backwards, but I carefully examined the board first. I believe the problem is a slight manufacturing defect . . . the resistor on the second LED appears to be unconnected . . . 

[img]http://www.billnkc.com/images/Robotics/05-14-08%20Bad%20Resistor-b.jpg[/img]

What do you think?

When I IGNORED the lack of a second power LED and hooked the test LED up to V+ and OUT0 the test LED blinked just as it should.

I MIGHT be able to "skootch" the resistor over its pad and it MIGHT connect. However, if it broke off then I would doubtless void the warranty.

Will you tell me what speed the SX Controller Board runs at when the SX-Key (USB) is attached and what speed it runs at when the SX-Key (USB) is not attached? (400KHz and 4MHz, respectively?)

If I want to speed the SX Controller Board up to 20MHz or 50MHz, do I simply buy the part from Parallax and plug it in the three pin female header between the SX Key connector and the DB9?

Thank you very much! 

--Bill

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