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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)   R65.50*   Y  
PULL (Pull-Up / Pull-Down Resistors)   R54.50*   Y  
4x4 Keypad   R165*   Y Y
Optocoupler   R390*     Y
Encoder   R225*     Y
Power Transistors   R200*   Y  
Wired Communication          
Ethernet (LAN)   R355*   Y Y
RS232 (Serial Communication)   R145* Y    
USB UART (Serial/RS232 to USB interface)   R165* Y   Y
USB SPI (SPI to USB interface)   R260*     Y
USB I2C (I2C to USB interface)   R260*     Y
CAN (Controller Area Network)   R335*   Y  
CAN-SPI (CAN with SPI interface)   R235*   Y Y
RS485   R200*   Y Y
LIN (Local Interconnect Network)   R390*   Y  
4-20mA Current Loop   R470*     Y
Fiber Optic   R615*     Y
Wireless Communication          
WiFi   R490*   Y Y
ZigBee / X-Bee   R525*   Y Y
Bluetooth   R645*   Y Y
Bluetooth Low Eneregy   R455*     Y
2.4GHz Radio   R180*     Y
868MHz Radio   R1,050*     Y
LoRa   R960*     Y
Infra-Red   R105*     Y
IrDA   R470*   Y Y
Energy Harvesting   R710*     Y
GSM / GPRS Communication          
Telit GL865   R890*     Y
Quectel M95   R800*     Y
Quectel UG95 (3G)   R1,550*     Y
SIM800H   R1,000*     Y
uBlox Leon G-100   R1,550*   Y  
MMC/SD Card   R220*   Y Y
RAM   R165* Y Y Y
Compact Flash   R390*   Y  
SerialFlash   R185*   Y Y
EEPROM   R89*   Y Y
Display / Touch Panel          
LED   R89*   Y  
LED Matrix Display   R165*     Y
Bar Graph (Meter) Display   R225*     Y
7-Segment Display   R185*   Y Y
TFT (Colour display with touch-panel)   R345* Y    
EVE Graphics Controller [i]   R710* Y Y Y
Touch-Panel Controller   R260* Y Y  
LCD/GLCD Display Adapters       Y  
On-Screen-Display   R635*     Y
ADC (Analogue to digital converter)   R265*   Y Y
LDC (Inductance to digital converter)   R635*   Y Y
Potentiometer (8 Potentiometers)   R295*   Y  
Digital Potentiometer   R110*   Y Y
DAC (Digital to analogue converter)   R335*   Y Y
Comparator   R225*     Y
Environment Measurement          
Temperature, Humidity & Pressure Measurement          
Temperature and Humidity   R295* Y Y Y
Thermocouple (Temperature)   R525*     Y
Infra-Red Thermometer   R1,050*     Y
Pressure Sensor   R455*     Y
GPS   R480*   Y Y
GNSS   R710*     Y
Motion & Position Measurement          
Three-Axis Accelerometer   R355* Y   Y
Tilt Sensor   R240*     Y
Gyroscope   R280*     Y
Compass   R280*     Y
Magnetic Field Detection (Hall Sensor)   R225*     Y
Motion Sensor   R145* Y   Y
Proximity/Distance Sensor   R190*     Y
Altitude Sensor   R160*     Y
Light & Colour Measurement          
Ambient Light Sensor   R180*     Y
Light to Frequency Converter   R330*   Y Y
UV Light Detector   R445*     Y
Color Sensor   R280*     Y
Line Following   R280*     Y
Chemical Detection          
Alcohol Sensor   R165*     Y
Air Quality Sensor   R305*     Y
CO (Carbon Monoxide) Sensor   R305*     Y
LPG (Liquefied Petroleum Gas) Sensor   R280*     Y
Methane Gas Sensor   R280*     Y
Hydrogen Gas Sensor   R280*     Y
Hall Effect Sensor   R225*     Y
Lightning Proximity Detector   R635*     Y
REED Switch   R130*     Y
Real-Time Clock (with PCF8583)   R235*   Y Y
Real-Time Clock (with Dallas DS1307)   R390*   Y Y
Piezo Buzzer (20Hz - 20KHz)   R100*   Y Y
Audio Codec (MP3 / WMA / etc)   R405*   Y Y
FM Tuner   R525*     Y
Voice Recognition   R710*     Y
Text To Speech   R710*     Y
Relay & Motor          
Relay   R335*   Y Y
Bipolar Stepper Motor Driver   R265*   Y Y
DC Motor Driver   R260*     Y
Buggy Car   R2,000*     Y
Haptic Feedback (Vibration)   R425*     Y
Step-down DC-DC converter   R355* Y    
USB Li-Po Charger   R185* Y    
Voltage Translators   R220*   Y  
Current Measurement   R265*     Y
Connectors / Adapters          
PS/2   R93* Y    
Port Expander   R225*   Y Y
RF-ID Reader (125KHz)   R445*   Y  
RF-ID Reader (13.56MHz)   R525*     Y
NFC   R225*     Y
RF Meter   R800*     Y
Capacitive Touch Sensing   R135*     Y
Joystick Input (Hall-Effect Sensor)   R410*     Y
Joystick Input (Analogue)   R370*     Y
PWM (Pulse-Width Modulation)   R275*     Y
Camera   R710*     Y
Fingerprint Sensor   R975*     Y
DALI (Digital Addressable Lighting Interface)   R455*     Y
Unique ID   R165*     Y
3D Gesture Detection / Recognition   R890*   Y  
Heart Rate   R355*     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.