[sdiy] voltage reference advice

[Justin Owen]

-----Original Message-----
From: Mike Beauchamp [mikebeauchamp at gmail.com]

> If I'm already a LM317 for the positive rail supply, why use another
for the voltage reference? Am I wrong in thinking that wouldn't give
me any increased stability and precision?

Oh - if your power supply (and its stability) is a known quantity then you might not gain as much of an advantage.

Having said that - I have used multiple LM317s wher I needed multiple precision voltages and power rails.

I've not used either of the 431 variants that have been mentioned but I have been accused of overkill when it comes to power supplies and voltage references.

:)

HTH