3.3V and 5V

Wireless & IoT Bluetooth
1

Hi,

Am interested of getting a few SparkFun Pro nRF52840 Mini to build a mesh network of sensors for transferring data such humidity, temperature and Heart Rate. Seek your help to find in your inventory whether is there a mini size microcontroller which able to supply both 3.3v and 5v for these sensors, pls.

Rgds

2

The SparkFun Pro nRF52840 Mini only supplies 3.3 volts, but if you have it connected to USB, 5 volts is available on the VIN pin. If you’re not connected to USB, you’d need an additional 5 volt power source.