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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)   R85.50*   Y  
PULL (Pull-Up / Pull-Down Resistors)   R71*   Y  
4x4 Keypad   R130*   Y Y
Optocoupler   R305*     Y
Encoder   R175*     Y
Power Transistors   R260*   Y  
Wired Communication          
Ethernet (LAN)   R275*   Y Y
RS232 (Serial Communication)   R115* Y    
USB UART (Serial/RS232 to USB interface)   R130* Y   Y
USB SPI (SPI to USB interface)   R200*     Y
USB I2C (I2C to USB interface)   R200*     Y
CAN (Controller Area Network)   R260*   Y  
CAN-SPI (CAN with SPI interface)   R305*   Y Y
RS485   R260*   Y Y
LIN (Local Interconnect Network)   R305*   Y  
4-20mA Current Loop   R375*     Y
Fiber Optic   R490*     Y
Wireless Communication          
WiFi   R360*   Y Y
ZigBee / X-Bee   R420*   Y Y
Bluetooth   R565*   Y Y
Bluetooth Low Eneregy   R360*     Y
2.4GHz Radio   R230*     Y
868MHz Radio   R835*     Y
LoRa   R765*     Y
Infra-Red   R140*     Y
IrDA   R375*   Y Y
Energy Harvesting   R565*     Y
GSM / GPRS Communication          
Telit GL865   R710*     Y
Quectel M95   R635*     Y
Quectel UG95 (3G)   R1,250*     Y
SIM800H   R805*     Y
uBlox Leon G-100   R1,250*   Y  
MMC/SD Card   R230*   Y Y
RAM   R215* Y Y Y
Compact Flash   R305*   Y  
SerialFlash   R145*   Y Y
EEPROM   R115*   Y Y
Display / Touch Panel          
LED   R115*   Y  
LED Matrix Display   R215*     Y
Bar Graph (Meter) Display   R175*     Y
7-Segment Display   R145*   Y Y
TFT (Colour display with touch-panel)   R450* Y    
EVE Graphics Controller [i]   R565* Y Y Y
Touch-Panel Controller   R205* Y Y  
LCD/GLCD Display Adapters       Y  
On-Screen-Display   R505*     Y
ADC (Analogue to digital converter)   R345*   Y Y
LDC (Inductance to digital converter)   R505*   Y Y
Potentiometer (8 Potentiometers)   R230*   Y  
Digital Potentiometer   R245*   Y Y
DAC (Digital to analogue converter)   R260*   Y Y
Comparator   R175*     Y
Environment Measurement          
Temperature, Humidity & Pressure Measurement          
Temperature and Humidity   R230* Y Y Y
Thermocouple (Temperature)   R420*     Y
Infra-Red Thermometer   R420*     Y
Pressure Sensor   R360*     Y
GPS   R635*   Y Y
GNSS   R565*     Y
Motion & Position Measurement          
Three-Axis Accelerometer   R275* Y   Y
Tilt Sensor   R185*     Y
Gyroscope   R360*     Y
Compass   R360*     Y
Magnetic Field Detection (Hall Sensor)   R175*     Y
Motion Sensor   R190* Y   Y
Proximity/Distance Sensor   R175*     Y
Altitude Sensor   R210*     Y
Light & Colour Measurement          
Ambient Light Sensor   R230*     Y
Light to Frequency Converter   R260*   Y Y
UV Light Detector   R345*     Y
Color Sensor   R215*     Y
Line Following   R215*     Y
Chemical Detection          
Alcohol Sensor   R215*     Y
Air Quality Sensor   R240*     Y
CO (Carbon Monoxide) Sensor   R240*     Y
LPG (Liquefied Petroleum Gas) Sensor   R215*     Y
Methane Gas Sensor   R215*     Y
Hydrogen Gas Sensor   R215*     Y
Hall Effect Sensor   R175*     Y
Lightning Proximity Detector   R505*     Y
REED Switch   R100*     Y
Real-Time Clock (with PCF8583)   R305*   Y Y
Real-Time Clock (with Dallas DS1307)   R305*   Y Y
Piezo Buzzer (20Hz - 20KHz)   R130*   Y Y
Audio Codec (MP3 / WMA / etc)   R315*   Y Y
FM Tuner   R420*     Y
Voice Recognition   R565*     Y
Text To Speech   R565*     Y
Relay & Motor          
Relay   R260*   Y Y
Bipolar Stepper Motor Driver   R260*   Y Y
DC Motor Driver   R205*     Y
Buggy Car   R1,650*     Y
Haptic Feedback (Vibration)   R335*     Y
Step-down DC-DC converter   R275* Y    
USB Li-Po Charger   R145* Y    
Voltage Translators   R290*   Y  
Current Measurement   R345*     Y
Connectors / Adapters          
PS/2   R72.50* Y    
Port Expander   R175*   Y Y
RF-ID Reader (125KHz)   R345*   Y  
RF-ID Reader (13.56MHz)   R420*     Y
NFC   R175*     Y
RF Meter   R635*     Y
Capacitive Touch Sensing   R175*     Y
Joystick Input (Hall-Effect Sensor)   R320*     Y
Joystick Input (Analogue)   R290*     Y
PWM (Pulse-Width Modulation)   R215*     Y
Camera   R565*     Y
Fingerprint Sensor   R780*     Y
DALI (Digital Addressable Lighting Interface)   R360*     Y
Unique ID   R130*     Y
3D Gesture Detection / Recognition   R710*   Y  
Heart Rate   R275*     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.