[sdiy] bizarre pic-midi issues

[Ingo Debus]

Am 16.04.2010 um 20:19 schrieb Karl Ekdahl:

> The hardware i'm using is a PIC18F4550 connected with it's RX pin  
> tied to pin 6 of a 6N136 via a 2.7K pull-up resistor,

In the Fairchild datasheet of the 6N136 propagation delay times are  
specified for a pull-up of 1.9k. Admitted, 2k7 isn't that much more,  
but maybe its worth a try using a smaller pull-up to speed up the  
optocoupler?

Ingo