[time-nuts] Poor man's oven

Jim Harman j99harman at gmail.com
Tue Jun 6 13:08:38 EDT 2017

On Tue, Jun 6, 2017 at 10:00 AM, Riley, Ian C CTR NSWC Philadelphia, 515 <
Ian.Riley.ctr at navy.mil> wrote:

> Is there a practical minimum for what voltage you can feed into AREF?

It is hard to find on the data sheet, but the minimum voltage for an
Arduino's AREF is the internal analog reference voltage - 1.1V for the Uno,
2.56V for the Leonardo or Micro. The 32U4 chip in the Leo and Micro has
options for differential analog input and gains of 10, 40, or 200 but they
are not supported by the Arduino IDE - you have to set the internal
registers directly to use them. Also the input amplifier is pretty slow.


--Jim Harman

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