We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Two small green circuit boards with chips and USB connectors

KEHIPI

KEHIPI AITRIP Pro Micro NRF52840 Development Board 2PCS

SKU CH-0123-RG3MK

Two NRF52840 development boards with ARM Cortex-M4F at 64 MHz, 1 MB flash, 256 KB RAM, 3.7 V lithium interface and Pro Micro pin compatibility

  • ARM Cortex-M4F at 64 MHz with 1 MB flash and 256 KB RAM
  • 7 V lithium interface and software LED switch drops standby to 1 mA
  • Pro Micro pinout makes it a drop-in replacement for almost any Pro Micro keyboard
  • Built-in ADC, PWM, SPI, I2C, UART, USB and GPIO for flexible peripheral support
  • Pack includes two NRF52840 boards ready for wireless Bluetooth projects

Pro Micro NRF52840 Development Board

This pack contains two NRF52840 boards built on the Pro Micro footprint. Each board uses an ARM Cortex-M4F processor running at 64 MHz with 1 MB flash and 256 KB RAM. A 3.7 V lithium battery connector and a software-controlled LED power switch allow standby current to reach 1 mA. The boards target makers adding wireless connectivity to custom keyboards or compact IoT nodes.

Makers building Pro Micro keyboards

The pinout matches the Pro Micro layout, so the boards drop into existing keyboard PCBs and most Pro Micro shields. Developers needing more than 256 KB RAM or a different processor architecture should evaluate other platforms. Projects that cannot accommodate a 3.7 V lithium cell or that require a higher-voltage supply will need additional regulation.

64 MHz Cortex-M4F with 1 MB flash and 256 KB RAM

This single specification defines whether the board fits the firmware budget. The 64 MHz clock and 1 MB flash support moderately complex Bluetooth LE stacks, while 256 KB RAM limits the size of buffers and concurrent tasks. If the application exceeds these limits, a device with more memory is required.

How it compares

Measured against everything we stock in Single-Board Computers & Dev Kits, at today’s prices. Recalculated every night.

Price $19.99
Cheaper than about 88% of the 1,420 comparable items (median $44.99).

New to this? Buying PC parts with Monero — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameAITRIP

Questions about this item

What pin spacing does the Pro Micro NRF52840 board use so it fits a standard Pro Micro keyboard PCB?

The pins match the Pro Micro layout, so the board drops into any keyboard designed for a Pro Micro footprint.

How do you enable the 1 mA standby mode on the NRF52840 development board?

Use the onboard software switch to cut power to the LED; the board then draws about 1 mA in standby.

When will the 3.7 V lithium battery connector on the NRF52840 board need replacement?

The JST‑style battery connector is rated for many insertion cycles; replace it only if the latch breaks or the contact becomes unreliable.

More in Single-Board Computers & Dev Kits

Similar items