On Tue, Nov 12, 2013 at 10:45 PM, joem joem@martindale-electric.co.uk wrote:
| great. 1.8+3.3=5.1 so the pull-up would be to 3.23V - enough to be |definitely below 3.3v.
Hmmmppp... pull ups don't work like you would expect under certain circumstances. I'm removing the 3rd diagram from here: http://www.gplsquared.com/eoma_boot/eoma_boot.html#uart_repair
ok mate. let us know if you think of something else. btw have you seen this? http://www.hobbytronics.co.uk/mosfet-voltage-level-converter