nRF51822 Mini Evaluation Board

Introduction

Demand for development and evaluation boards the world over has increased. Due to such demand, many electronic components manufacturers have shifted focus to generating different types of microcontrollers that are flexible, efficient, and compatible with other electronic components to create such boards. One microcontroller is the nRF51822, and in this project, we are going to incorporate this microcontroller to develop a mini evaluation board that can be used to power several electronic projects.

Required Components

• 100nF Unpolarized capacitor, small symbol C1, C8 C_0805_2012Metric
• 12pF Unpolarized capacitor, small symbol C2, C3 C_0805_2012Metric 2.2nF Unpolarized capacitor, small symbol C4 C_0805_2012Metric
• 2.2pF Unpolarized capacitor, small symbol C5 C_0805_2012Metric
• 1.0pF Unpolarized capacitor, small symbol C6 C_0805_2012Metric
• 1.5pF Unpolarized capacitor, small symbol C7 C_0805_2012Metric
• 47nF Unpolarized capacitor, small symbol C9 C_0805_2012Metric
• 1.0nF Unpolarized capacitor, small symbol C10 C_0805_2012Metric
• 1uF Unpolarized capacitor, small symbol C11, C14 C_0805_2012Metric
• 10uF Polarized capacitor, small US symbol C12, C13 C_Elec_3x5.4
• LED_Small Light emitting diode, small symbol D1 LED_0805_2012Metric
• Conn_01x17 Generic connector, single row, 01x17, script generated (kicad-library-utils/schlib/autogen/connector/) J1, J2 PinHeader_1x17_P2.54mm_Vertical
• Conn_02x02_Odd_Even Generic connector, double row, 02x02, odd/even pin numbering scheme (row 1 odd numbers, row 2 even numbers), script generated (kicad-library-utils/schlub/autogen/connector/) J3 PinHeader_2x02_P2.54mm_Vertical
• Screw_Terminal_01x01 Generic screw terminal, single row, 01x01, script generated (kicad-library-utils/schlub/autogen/connector/) J4 SolderWire-0.1sqmm_1x01_D0.4mm_OD1mm
• USB_B_Micro USB Micro Type B connector J5 USB_Mini-B_Lumberg_2486_01_Horizontal
• 10nH Inductor, small symbol L1 L_0805_2012Metric
• 4.7nH Inductor, small symbol L2 L_0805_2012Metric
• 3.3nH Inductor, small symbol L3 L_0805_2012Metric
• 1k Resistor, small US symbol R1 L_0805_2012Metric
• nRF51x22-QFxx Multiprotocol BLE/2.4GHz Cortex-M0+ SoC U1 QFN-48-1EP_6x6mm_P0.4mm_EP4.6x4.6mm LP5907MFX-3.3 250-mA Ultra-Low-Noise Low-IQ LDO, 3.3V, SOT-23 U2 SOT-23-5
• 16MHz Two-pin crystal, small symbol Y1 Crystal_HC49-4H_Vertical

nRF51822

nRF51822 is a multiprotocol Bluetooth low energy and 2.4GHz proprietary system-on-chip microcontroller. The nRF51822 is suitable for wireless applications. It is an incorporation of the Nordic’s latest radio transceiver, 256kB/128kB flash, an ARM@ Cortex TM M0 CPU, and 32KB/16kB RAM.

The Schematic Diagram

The schematic diagram is designed in KiCAD, with all the necessary components selected according to set standards.

KEY FEATURES

• Multiprotocol 2.4GHz radio

• 32-bit ARM Cortex M0 processor

• 256kB/128kB flash and 32kB/16kB RAM

• Software stacks available as downloads

• Pin compatible with other nRF51 Series devices

• Application development independent from the protocol stack

• Fully on-air compatible with nRF24L Series

• Programmable output power from +4dBm to -20dBm

• RSSI • RAM mapped FIFOs using EasyDMA

• Dynamic on-air payload length of up to 256 Bytes

• Flexible and configurable 31-pin GPIO

• Programmable Peripheral Interface – PPI

• Simple ON/OFF global power modes

• Full set of digital interfaces, including SPI/2-wire/UART

• 10-bit ADC

• 128-bit AES ECB/CCM/AAR co-processor

• Quadrature demodulator

• Low-cost external crystal 16MHz ± 40ppm

• Low power 16MHz crystal and RC oscillators

• Ultra low power 32kHz crystal and RC oscillators

• Wide supply voltage range (1.8 V to 3.6 V)

• On-chip DC/DC buck converter

• Individual power management for all peripherals

• Package options: 48-pin 6x6 QFN/WLCS

APPLICATIONS

• Bluetooth low-energy applications

• Wearables

• Beacons

• Appcessories

• Computer peripherals

• CE remote controls for TV, STB, and media systems

• Proximity and security alert tags

• Sports- and fitness sensors

• Healthcare and lifestyle sensors

• Game controllers for computers

• Toys and Electronic games

• Domestic/Industrial control and data-acquisition

• Intelligent domestic appliances

Cheap Fabrication of the PCB Boards

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Credits