[sdiy] Generating +5V gate signals from +3.3V logic

[ASSI]

On Sunday 04 March 2012, 11:27:55, Tom Wiltshire wrote:
> I'm running a 3.3V dsPIC and I want to generate 0-5V gate outputs from it.
> I've got a 3.3V supply for the uP, and a +/-12V for the op-amps, but no
> +5V supply.

If the dsPIC has 5V tolerant open drain outputs, this could be as easy as 
adding a resistor from 12V and 5V zener diode (or a 5V voltage reference), 
the diode goes between output and ground.  If they're not 5V tolerant, you 
need another transistor, but by then one of those micro-regulators would 
likely be easier to deal with.


Regards,
Achim.
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