NRF52840 Supermini Development Board Compatible with Nice!Nano V2.0 - Bluetooth Charging Management

The Supermini NRF52840 is an alternative development board to the Pro Micro, compatible with the Nice! Nano. Its pinouts are the same as the ProMicro, meaning it can be used with almost any ProMicro keyboard.

The NRF52840 development board has a 3.7V lithium battery interface and a software switch that can cut off the power supply of the LED. When turned off, the standby power consumption can reach 1mA.

nRF52840 is a high-performance, low-power wireless SoC chip launched by Norwegian company Nordic Semiconductor. It supports multiple wireless protocols, including Bluetooth 5, Thread, Zigbee, ANT, and 2.4 GHz. The nRF52840 chip uses a 64 MHz ARM Cortex-M4F processor, with 1 MB of onboard flash and 256 KB of RAM.

It also has various peripherals including ADC, PWM, SPI, I2C, UART, USB and GPIO etc. In addition, nRF52840 also supports various security features such as AES encryption, SHA-256 hashing and true random number generator (TRNG).

SPECIFICATIONS

• Brand: QSZNTEC
• Origin: Mainland China
  
• Model: Supermini NRF52840
• Choice: Yes
• Semi-choice: Yes

Product Settings

• Powerful wireless capabilities: Bluetooth 5.0, built-in antenna
• Powerful CPU: The nRF52840 chip uses a 64 MHz ARM Cortex-M4F processor, with 1 MB of onboard flash memory and 256 KB of RAM
• Battery charging chip: support lithium battery charging and discharging
• Power consumption: Standby power consumption can reach 1 mA

Food

The Supermini NRF52840 supports charging and discharging 3.7V lithium battery. The charging rate is 100mA during charging, so a 2000mAh battery takes 20 hours to be fully charged.

Charging Current

Caution: When BOOST is connected, the charging current changes from 100mA to 300mA, and it can only be connected when the capacitor capacity is greater than 500mAh (to prevent explosion).

External Battery

If you need a power bank, you only need to connect the positive pole of the battery to B+ and the negative pole to B-. The power bank only supports 3.7V and the charging rate is 100mA (a 2000mAh battery takes 20 hours to be fully charged). Note: When welding, please be careful not to short-circuit the positive and negative poles, which may damage the battery and equipment.

External VCC Control

Tip: When P0.13 is set to low, the power to the 3.3V, VCC pin will be cut off. This is useful to reduce the power consumption of standby components (e.g. RGB, LEDs).

Bootloader

If you want to enter the Bootloader, please short RST to GND twice within 0.5 seconds. Enter the Bootloader, connect to the computer via USB, and a storage device called Nice! Nano will be displayed. Then you can drag the .uf2 file to burn the program.

Delivery List

• 1 x Supermini NRF52840 Board