On 8/29/14, 12:04 AM, "[email protected]" <[email protected]> wrote:
> I've looked through the capes advertised on beagleboard.org but I > can't find anything that offers general purpose buffering and level > conversion. Is there really nothing of this sort available or am I > missing something? > > Given the sensitivity/vulnerability of the BBB's I/O I would hae > thought an I/O cape that provides, say, 16 bidirectional 5v digital > I/O pins would be very useful. If it also buffered the A2D inputs > that would be a bonus. > > I guess I'll have to DIY it on a breadboard cape. It is such a simple thing to make. Here is what you need: http://www.digikey.com/product-detail/en/8100-SMT10/438-1032-ND/569736 For bidirectional push pull http://www.ti.com/product/txb0108?keyMatch=txb0108&tisearch=Search-EN For bidirectional open collector such as I2C http://www.ti.com/product/TXS0108E?keyMatch=txs0108&tisearch=Search-EN Make sure you order the correct packaging to match the board pitch above, or buy a different board with a different pitch. Then on eBay I found these jumpers which work great. I ordered both male to female and female to female jumpers. http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR0.TRC 0.H0.X200pcs+10cm+2.54mm&_nkw=200pcs+10cm+2.54mm&_sacat=0 I created a board with two of each, with enable pull up resistors and decoupling capacitors under the board. I have attached a picture. Regards, John > > -- > Chris Green > · > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
