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Overview and features

Blip is a development board for Bluetooth Low Energy (BLE) and 802.15.4 based wireless applications, based on the Nordic Semiconductor nRF52840 SoC. It has a Black Magic Probe compatible programmer and debugger built-in along with temperature/humidity sensor, ambient light intensity sensor, and a 3-axis accelerometer. It is usable to prototype for very low power applications, and debugger and regulator can be disconnected when only SoC needs to be powered.


  • Raytac MDBT50 module based on Nordic Semiconductor's nRF52840
  • nRF52840 advanced single chip 2.4GHz multiprotocol SoC
  • 32-bit ARM Cortex-M4F processor, 1MB flash + 256 kB RAM
  • external crystal oscillator 32.768MHZ, on-chip 32MHz
  • Power Supply: USB, JST connector for Li-ion/Li-po, Vext 1.8V - 3.3V
  • BQ24079 battery charging and power management IC
  • Built in 3.3V LDO for USB and Lipo
  • MicroSD slot
  • Bluetooth 5 support for long range and high throughput
  • 802.15.2 radio support
  • LIS2DDH12 High-performance 3-axis "femto" accelerometer
  • Optical Sensor LTR-329ALS-01
  • Si7006-A20 I2C humidity and temperature sensor
  • On board STM32F103CBT6 as Black magic probe debugger

Operating conditions

Maximum Input Voltage

  • USB powered : 5V
  • Vext = 1.8V to 3.3V
  • Vbat = Lithium ion/polymer 3.7/4.2V battery

Power Ratings

  • Max current through USB: 150mA (for charging and/or system power)
  • When powering with Vext, the debugger, charging IC, and LDO are bypassed for low current consumption

[Note: battery is not required for powering blip]