madscifi Posted December 23, 2012 Report Share Posted December 23, 2012 I just tested a 16-Bit I/O Buffer Wing that I purchased from LinkSprite and it does not appear to limit the pass-through voltage to 3.3 volts.Test procedure (number in parentheses is the actual meter readings):3.3 (3.297) volts/ground connected to the 3.3 volt and ground power connectors.A volt meter was connected from pin A16 (pin 26 on the chip) to ground.3.3 (3.297) volts was applied to JP7 pin 8 (pin 23 on the chip, labeled as 15 on the board). 3.3 (3.297) volts was shown on the volt meter.5 (4.73) volts was applied to JP7 pin 8 (pin 23 on the chip, labeled as 15 on the board). 5 (4.73) volts was shown on the volt meter.Is there something I'm doing wrong?(Full disclosure - I've exchanged emails with Gadget Factory in the past about this board because I had concerns about the chip used on this board, but the board was out of stock at the time so I was unable to test an actual board at that time.) Link to comment Share on other sites More sharing options...
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