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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)   R71*   Y  
PULL (Pull-Up / Pull-Down Resistors)   R59*   Y  
4x4 Keypad   R155*   Y Y
Optocoupler   R360*     Y
Encoder   R205*     Y
Power Transistors   R215*   Y  
Wired Communication          
Ethernet (LAN)   R325*   Y Y
RS232 (Serial Communication)   R135* Y    
USB UART (Serial/RS232 to USB interface)   R155* Y   Y
USB SPI (SPI to USB interface)   R240*     Y
USB I2C (I2C to USB interface)   R240*     Y
CAN (Controller Area Network)   R310*   Y  
CAN-SPI (CAN with SPI interface)   R250*   Y Y
RS485   R215*   Y Y
LIN (Local Interconnect Network)   R310*   Y  
4-20mA Current Loop   R435*     Y
Fiber Optic   R570*     Y
Wireless Communication          
WiFi   R450*   Y Y
ZigBee / X-Bee   R485*   Y Y
Bluetooth   R655*   Y Y
Bluetooth Low Eneregy   R420*     Y
2.4GHz Radio   R190*     Y
868MHz Radio   R965*     Y
LoRa   R885*     Y
Infra-Red   R115*     Y
IrDA   R435*   Y Y
Energy Harvesting   R655*     Y
GSM / GPRS Communication          
Telit GL865   R820*     Y
Quectel M95   R735*     Y
Quectel UG95 (3G)   R1,400*     Y
SIM800H   R935*     Y
uBlox Leon G-100   R1,450*   Y  
MMC/SD Card   R240*   Y Y
RAM   R180* Y Y Y
Compact Flash   R360*   Y  
SerialFlash   R170*   Y Y
EEPROM   R96*   Y Y
Display / Touch Panel          
LED   R96*   Y  
LED Matrix Display   R180*     Y
LED Ring   R275*     Y
Bar Graph (Meter) Display   R205*     Y
7-Segment Display   R170*   Y Y
TFT (Colour display with touch-panel)   R370* Y    
EVE Graphics Controller [i]   R655* Y Y Y
Touch-Panel Controller   R240* Y Y  
LCD/GLCD Display Adapters       Y  
On-Screen-Display   R585*     Y
ADC (Analogue to digital converter)   R290*   Y Y
LDC (Inductance to digital converter)   R585*   Y Y
Potentiometer (8 Potentiometers)   R275*   Y  
Digital Potentiometer   R105*   Y Y
DAC (Digital to analogue converter)   R310*   Y Y
Comparator   R205*     Y
Environment Measurement          
Temperature, Humidity & Pressure Measurement          
Temperature and Humidity   R275* Y Y Y
Thermocouple (Temperature)   R485*     Y
Infra-Red Thermometer   R965*     Y
Pressure Sensor   R420*     Y
GPS   R515*   Y Y
GNSS   R655*     Y
Motion & Position Measurement          
Three-Axis Accelerometer   R325* Y   Y
Tilt Sensor   R220*     Y
Gyroscope   R300*     Y
Compass   R300*     Y
Magnetic Field Detection (Hall Sensor)   R205*     Y
Motion Sensor   R155* Y   Y
Proximity/Distance Sensor   R205*     Y
Altitude Sensor   R175*     Y
Stretch Measurement   R585*     Y
Force & Weight          
Force   R420*     Y
Light & Colour Measurement          
Ambient Light Sensor   R190*     Y
Light to Frequency Converter   R305*   Y Y
UV Light Detector   R410*     Y
Color Sensor   R255*     Y
Line Following   R255*     Y
Chemical Detection          
Alcohol Sensor   R180*     Y
Air Quality Sensor   R285*     Y
Ozone Detection (O3)       Y
CO (Carbon Monoxide) Sensor   R285*     Y
LPG (Liquefied Petroleum Gas) Sensor   R255*     Y
Methane Gas Sensor   R255*     Y
Hydrogen Gas Sensor   R255*     Y
Hall Effect Sensor   R205*     Y
Lightning Proximity Detector   R585*     Y
REED Switch   R120*     Y
Real-Time Clock (with PCF8583)   R360*   Y Y
Real-Time Clock (with Dallas DS1307)   R360*   Y Y
Timer   R310*   Y Y
Piezo Buzzer (20Hz - 20KHz)   R110*   Y Y
Audio Codec (MP3 / WMA / etc)   R375*   Y Y
FM Tuner   R485*     Y
Voice Recognition   R410*     Y
Text To Speech   R655*     Y
Audio Amplifier   R240*     Y
Noise Dectection   R485*     Y
Relay & Motor          
Relay   R310*   Y Y
Bipolar Stepper Motor Driver   R290*   Y Y
DC Motor Driver   R240*     Y
Buggy Car   R1,850*     Y
Haptic Feedback (Vibration)   R395*     Y
Step-down DC-DC converter   R325* Y    
USB Li-Po Charger   R170* Y    
Voltage Translators   R240*   Y  
Current Measurement   R155*     Y
Connectors / Adapters          
PS/2   R85.50* Y    
Port Expander   R205*   Y Y
RF-ID Reader (125KHz)   R410*   Y  
RF-ID Reader (13.56MHz)   R485*     Y
NFC   R205*     Y
RF Meter   R735*     Y
Capacitive Touch Sensing   R145*     Y
Joystick Input (Hall-Effect Sensor)   R375*     Y
Joystick Input (Analogue)   R345*     Y
PWM (Pulse-Width Modulation)   R255*     Y
Camera   R655*     Y
Fingerprint Sensor   R900*     Y
DALI (Digital Addressable Lighting Interface)   R420*     Y
Unique ID   R155*     Y
3D Gesture Detection / Recognition   R820*   Y  
Heart Rate   R325*     Y
Cap Extend click   R310*     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.