This is a pair of two ProMicro NRF52840 Controllers.
This is a Nice!Nano clone, testing shows that it is almost 100% compatible with the Nice!Nano. Further documentation on this controller can be found on ICBuy.
This controller is a good choice for those that are more price conscious. The Rolio46 can provide about 2 weeks of use between charges with this controller (depending on backlight usage etc).
For a high usage scenario this controller's power profile is roughly comparable to the Nice!Nano.
Specifications
Microcontroller
Nordic nRF52840
Flash
1MB
RAM
256KB
GPIO Pins
21
Battery Charger
4.2V Lithium @ 100/500mA
Voltage
3.3V
Quiescent Current
~125μA
Includes
2 x ProMicro NRF52840 Controllers
4 x 12 Pin Headers
2 x 3 Pin Headers
Notes
This controller will reduce the time between charges from more than 4 weeks with the nice!nano to about 2 weeks. In practice, this is still quite usable.
You should not disable external power control if you have an attached display as special control instructions will not be sent to the display when the CPU goes to sleep. These control instructions prevent the display from developing a DC bias which shortens its service life.
