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QuestionControlling LEDs From USB port Pin
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AnswerRe: Controlling LEDs From USB port [modified] Pin
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AnswerRe: Controlling LEDs From USB port Pin
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AnswerRe: Controlling LEDs From USB port [modified] Pin
mustang8614-Aug-09 18:43
mustang8614-Aug-09 18:43 
Hi.

You asked the same question a year ago:
http://www.codeproject.com/Forums/1649/Csharp.aspx?fid=1649&select=2672552&tid=2672552[^]

My question is why do you want to "flash LEDs"?
I doubt that your real desire is to have your PC light up an LED. Smile | :) So, it then comes down to what do you want to control with your PC, the reason, and so on.

A super simple solution is the following:
I/O Ports Uncensored - 1 - Controlling LEDs (Light Emiting Diodes) with Parallel Port[^]

And an USB to Parallel adapter (~$15).
http://www.amazon.com/Sabrent-SBT-UPPC-Parallel-6-Foot-Printer/dp/B0007UVRVO[^]


But, if it's for something that going to be built and packaged, then that's different. In that case, your best bet could be to go with a USB bridge that has parallel outputs. You can use something like the Silicon Labs CP2103. Or, even the CP2102, and use the RS232 signals.
https://www.silabs.com/products/mcu/Pages/CP2103EK.aspx[^]
It's ~$30 for the test kit, and the chips are easy to get and very cheap.

Also, FTDI makes a number of chips, like the FT245R.
http://www.ftdichip.com/Products/FT245R.htm[^]


I've used the CP2103 a lot. It's awesome for a simple, cheap, small space solution to have an embedded controller or FPGA communicate to a PC. Now, I need something faster than ~1MBit transfer. So, I'm going to use an FTDI chip.

Otherwise, there are other products/boards, like at Phidgets.com, that have relays on the board so that you can drive more current.

_______________
Joe

modified on Saturday, August 15, 2009 7:21 PM

AnswerRe: Controlling LEDs From USB port Pin
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