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Accessory Boards
Accessory boards allow you to add specific functionality to your microcontroller-based application.

They are available for everything from communication, to storage, to analogue functionality.

Please note that the below list does not include all of the boards available. For a complete list, please see the store.
Connection Standard Available (What's this?)
Board   Price
Basic Digital I/O          
Input (DIP Switches)   R88.50*   Y  
PULL (Pull-Up / Pull-Down Resistors)   R73.50*   Y  
4x4 Keypad   R195*   Y Y
Optocoupler   R450*     Y
Encoder   R255*     Y
Power Transistors   R270*   Y  
Wired Communication          
Ethernet (LAN)   R285*   Y Y
RS232 (Serial Communication)   R170* Y    
USB UART (Serial/RS232 to USB interface)   R195* Y   Y
USB SPI (SPI to USB interface)   R300*     Y
USB I2C (I2C to USB interface)   R300*     Y
CAN (Controller Area Network)   R385*   Y  
CAN-SPI (CAN with SPI interface)   R315*   Y Y
RS485   R270*   Y Y
LIN (Local Interconnect Network)   R385*   Y  
4-20mA Current Loop   R545*     Y
Fiber Optic   R710*     Y
Wireless Communication          
WiFi   R565*   Y Y
ZigBee / X-Bee   R755*   Y Y
Bluetooth   R865*   Y Y
Bluetooth Low Eneregy   R525*     Y
2.4GHz Radio   R240*     Y
868MHz Radio   R1,200*     Y
LoRa   R1,100*     Y
Infra-Red   R140*     Y
IrDA   R540*   Y Y
Energy Harvesting   R815*     Y
GSM / GPRS Communication          
Telit GL865   R1,050*     Y
Quectel M95   R920*     Y
Quectel UG95 (3G)   R1,250*     Y
SIM800H   R1,150*     Y
uBlox Leon G-100   R1,800*   Y  
MMC/SD Card   R300*   Y Y
RAM   R225* Y Y Y
Compact Flash   R450*   Y  
SerialFlash   R215*   Y Y
EEPROM   R170*   Y Y
Display / Touch Panel          
LED   R120*   Y  
LED Matrix Display   R320*     Y
LED Ring   R525*     Y
Bar Graph (Meter) Display   R255*     Y
7-Segment Display   R215*   Y Y
TFT (Colour display with touch-panel)   R465* Y    
EVE Graphics Controller [i]   R815* Y Y Y
Touch-Panel Controller   R300* Y Y  
LCD/GLCD Display Adapters       Y  
On-Screen-Display   R735*     Y
ADC (Analogue to digital converter)   R515*   Y Y
LDC (Inductance to digital converter)   R735*   Y Y
Potentiometer (8 Potentiometers)   R345*   Y  
Digital Potentiometer   R130*   Y Y
DAC (Digital to analogue converter)   R385*   Y Y
Comparator   R255*     Y
Environment Measurement          
Temperature, Humidity & Pressure Measurement          
Temperature and Humidity   R345* Y Y Y
Thermocouple (Temperature)   R605*     Y
Infra-Red Thermometer   R1,200*     Y
Pressure Sensor   R525*     Y
GPS   R645*   Y Y
GNSS   R815*     Y
Motion & Position Measurement          
Three-Axis Accelerometer   R405* Y   Y
Tilt Sensor   R275*     Y
Gyroscope   R375*     Y
Compass   R375*     Y
Magnetic Field Detection (Hall Sensor)   R255*     Y
Motion Sensor   R195* Y   Y
Proximity/Distance Sensor   R255*     Y
Altitude Sensor   R215*     Y
Stretch Measurement   R1,150*     Y
Force & Weight          
Force   R670*     Y
Light & Colour Measurement          
Ambient Light Sensor   R240*     Y
Light to Frequency Converter   R385*   Y Y
UV Light Detector   R515*     Y
Color Sensor   R225*     Y
Line Following   R320*     Y
Chemical Detection          
Alcohol Sensor   R320*     Y
Air Quality Sensor   R355*     Y
Ozone Detection (O3)       Y
CO (Carbon Monoxide) Sensor   R355*     Y
LPG (Liquefied Petroleum Gas) Sensor   R320*     Y
Methane Gas Sensor   R320*     Y
Hydrogen Gas Sensor   R320*     Y
Hall Effect Sensor   R255*     Y
Lightning Proximity Detector   R735*     Y
REED Switch   R150*     Y
Real-Time Clock (with PCF8583)   R450*   Y Y
Real-Time Clock (with Dallas DS1307)   R450*   Y Y
Timer   R385*   Y Y
Piezo Buzzer (20Hz - 20KHz)   R64*   Y Y
Audio Codec (MP3 / WMA / etc)   R470*   Y Y
FM Tuner   R605*     Y
Voice Recognition   R710*     Y
Text To Speech   R965*     Y
Audio Amplifier   R300*     Y
Noise Dectection   R605*     Y
Relay & Motor          
Relay   R385*   Y Y
Bipolar Stepper Motor Driver   R360*   Y Y
DC Motor Driver   R210*     Y
Buggy Car   R2,300*     Y
Haptic Feedback (Vibration)   R490*     Y
Step-down DC-DC converter   R405* Y    
USB Li-Po Charger   R210* Y    
Voltage Translators   R300*   Y  
Current Measurement   R195*     Y
Connectors / Adapters          
PS/2   R105* Y    
Port Expander   R255*   Y Y
RF-ID Reader (125KHz)   R515*   Y  
RF-ID Reader (13.56MHz)   R605*     Y
NFC   R255*     Y
RF Meter   R920*     Y
Capacitive Touch Sensing   R180*     Y
Joystick Input (Hall-Effect Sensor)   R470*     Y
Joystick Input (Analogue)   R525*     Y
PWM (Pulse-Width Modulation)   R320*     Y
Camera   R815*     Y
Fingerprint Sensor   R1,150*     Y
DALI (Digital Addressable Lighting Interface)   R525*     Y
Unique ID   R195*     Y
3D Gesture Detection / Recognition   R1,050*   Y  
Heart Rate   R405*     Y
Cap Extend click   R385*     Y

About Connection Standards
Most accessory boards are designed to a specific standard, allowing them to be easily connected to development hardware (Development Systems / Ready-Start Systems / PLC Systems).

Note however that this does not mean that they can only be used with hardware featuring the relevant standard - they can of course also all be used with any hardware by manually making the connections to them. The connection standard simply makes things easier when compatible hardware is available.

The three different groups which accessory boards can be classified into, based on the connection standard they employ, are:
General (No Standard)

This type has no connection standard. Connections are simply made by soldering wires/pins onto the pads provided.

Any of the other types of connection standards (IDC10 / mikroBus) can obviously also be used in this way.


A MAX3232 accessory board, connected to a breadboard.
IDC10 Standard

This type makes use of the IDC10 connection standard, which exposes the 8 pins of a microcontroller's "port", as well as power and ground.

IDC10 Headers are found on MikroElektronika development systems, ready-start systems and PLC systems.

An adapter is available for connecting IDC10 accessory boards to mikroBus sockets.


A bipolar stepper motor driver accessory board, connected to an EasyPIC7.
mikroBus ("click") Standard

This type makes use of the mikroBus standard, which exposes specific pins for SPI, I2C, UART, etc.

mikroBus sockets are found on newer MikroElektronika development systems, as well as our Breeze boards and the Clicker boards.

A mikroBus WiFi PLUS click accessory board, connected to a Breeze board.

*Prices exclude VAT and may be subject to the Rand/Dollar exchange rate / change without notice. Please see the store for more information on pricing. Where a board is available in multiple different types, the price indicated is that of the least-expensive type.