At 06:41 PM 5/3/2005 -0500, you wrote: >An opto certainly would get you there, then. >Digikey has some nice ones from Panasonic and NEC with CTR's above >10-0%, so you could doinverting or non-inverting conversion with only >the opto and a pair of resistors.
<---Certainly the better engineered way to do it I suppose. Then again, his
local RS may not have one :-)
Mathew, if you're interested I've attached a schematic of the level
translator you're after - it uses very common parts (this is the 'quick and
dirty' approach <g>).
The transistors themselves aren't critical - any small signal NPN, such as
an 2N2222 or 2N3904 will work fine. The resistor values aren't particularly
critical either - anything from 4.7K to 22K should be fine.
Ken
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