IoT sensor design gets stable voltage from AA battery

Recom is offering a breakout board to connect the SensorTile from STMicroelectronics to its R-78S evaluation board.

R-78S3.3-0.1-EVM-1/STM-1 board

The design allows the SensorTile to draw a stable 3.3V from a AA battery down to voltages as low as 0.65V.

The R-78S3.3-0.1-EVM-1/STM-1 board can be used with the STEVAL STLCS01V1 SensorTile module and the R-78S3.3-0.1-EVM-1 evaluation module.

According to Recom, when powered directly through a coin cell battery, the input voltage can drop after only a few hours of use.

To address this the R-78S boosts a single-cell AA battery voltage of 1.5V up to a stable 3.3V – demonstrated by the R-78S Evaluation Board.

Test points for measuring voltages and currents make it possible to effortlessly calculate the typical battery lifetime for the SensorTile in both active and standby modes.

There is also an option to use external input voltage from other low voltage sources such as energy harvesting devices which are typical in remote applications.

Leave a Reply

Your email address will not be published. Required fields are marked *