[sdiy] most efficient way to get 5V from 12V?

[Jason Proctor]

hey Danjel,

you're pretty much doing the same thing as me, so feel free to copy 
as much stuff from the Arduino module as you like.

the prototype has a regular MOTM +/-15v power connector and has two 
5v regulators on board - a MAT-something to run the uproc, the DAC, 
and the MIDI optocoupler, and a 7805 to run the opamps in the 
interfacing. it also has a 7905 to run the negative side of the 
analogue interface.

i've had exactly no problems with this setup. the "final" design will 
probably only have one regulator (there are currently two due to 
board layout and my inexperience with same) and most likely a 7805 
will do fine.

(note that the x0xb0x has a 7805 to run its digital side.)

...and we might include a separate regulated 2.5v source to bias the 
analogue interface.

hth
J


>If I want to run the digital parts of my module at 5V I am going to
>need to convert the 12V source. On some Euro modules the 5V conversion
>is done externally via a Doepfer 5V adapter (just has a regulator and
>a heatsink on it and plugs into the bussboard)
>
>Is there any reason that I can't do this on the module?  If I do it
>there, what is the most efficient way (i.e. generates the least heat)
>so that I don't need a large heat sink?
>
>cheers,
>Danjel
>_______________________________________________
>Synth-diy mailing list
>Synth-diy at dropmix.xs4all.nl
>http://dropmix.xs4all.nl/mailman/listinfo/synth-diy