EnviroDIY / EnviroDIY_Mayfly_Logger

hardware design files, example code sketches, and documentation for Arduino-framework EnviroDIY Mayfly data logger
https://envirodiy.org/mayfly/
Other
30 stars 26 forks source link

LiIon 3.6V #29

Open neilh10 opened 2 years ago

neilh10 commented 2 years ago

FeatureRequest It would be nice if the Mayfly could be specified to run from a 3.6V LiIon Li-SOCL₂

eg D Cell 3.6V Lithium Thionyl Chloride Battery single use ER34615 19AHr, or ER18505 4100mAh The advantage is a single cell battery, that is specified for an outdoor temperature range. It is relatively high impedance, so is likely only to support a standalone Mayfly with no or low current Xbee.

Seems like this should be possible. The AREF has an external capacitor, AREF can be routed internally " Voltage Reference Selections for ADC" and use either the AVCC, or 2.56V or 1.1V The processor mega1284 supports a voltage range from 1.8-5.5V, so if the LDO could be bypassed it would be able to use a wide dynamic range including that of the Li-SOCl2, standard LiIon rechargeable.
(updated 2021Oct21)