[sdiy] switching supply for synth use. also using TTL for synths

[anthony]

I thought about that. Maybe the 5V supply, but the 24V supply is for the 
stepper motor(s - if it's the one with the ADF)

This was actually what led me to bring up using TTL or HCMOS with the 5V 
supply. One it would lighten the load on the +/-15V supply and TWO it would 
put a load on the big part of the supply. It looks like it's all zeners and 
LM431's inside. I don't think 431's need much of a load to work.


> I'd be wary of using the minor rails of a big power supply.  The main
> part of the supply (+5v & +24v) may need to be supplying significant
> current before the whole thing regulates properly.
>