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| felix_ | after accidentially frying the eprom emulator i need for some commercial project (who expects unused pins being conected to 12v?!), i had some time to work a bit on the axiom photonsdi hw again today... | 23:28 |
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| Bertl_oO | eprom emulator? sounds interesting! | 23:39 |
| felix_ | it was a memsim2 and i'm currently working on a board from i think 1997 or so | 23:42 |
| felix_ | i connected the leds on the sdi board to +1v8 now; can't really route them to the +3v3 io bank | 23:43 |
| felix_ | i like orange leds, so that's not a too big problem though ;) | 23:47 |
| Bertl_oO | maybe connect them to 3V3 and use the 1V8 bank anyway? | 23:54 |
| felix_ | does that work realiably or might that cause problems? | 23:55 |
| Bertl_oO | 3.3-1.8 = 1.5V and that is below any LED forward voltage, no? | 23:55 |
| felix_ | yep; so that should work | 23:56 |
| Bertl_oO | so there is no chance that the ping gets pulled up above 1.8V | 23:56 |
| Bertl_oO | with the typical 1K-10K for indicators nowadays, the current is not a problem either | 23:56 |
| felix_ | that was my concern there, but with only 1.5v difference we're on the safe side. also the rather big resistor | 23:56 |
| felix_ | getting the 3.3v to the leds is no problem | 23:57 |
| felix_ | in terms of routability | 23:57 |
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