Times Square DIY Watch - 5V FTDI Cable Compatible?

by bob_mct on Sun Dec 02, 2012 8:08 am

Can you use a 5V FTDI Cable to reprogram the Times Square DIY Watch (http://www.adafruit.com/products/1106 ) or do you have to use a 3.3V FTDI Cable?

I have a 5V (TTL level) FTDI Cable already and just wanted to know if this would possibly damage any of the components on this watch. I realize that the 3.3V FTDI cable does provide a 5V power wire, but that the rx, tx and the other signals are at 3.3V levels. The 5V FTDI cable I have provides rx, tx, and the other signals at 5V (TTL) levels.

Also, when you connect the FTDI cable to program the watch, should you make sure to remove the coin battery first?

Thanks, bob_mct
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Re: Times Square DIY Watch - 5V FTDI Cable Compatible?

by adafruit on Mon Dec 03, 2012 8:10 pm

it should be OK for short periods, we do suggest the 3.3V logic FTDI friend/cable. the coin cell must be in place to program, as it isnt powered by the cable!
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