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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)   R75.50*   Y  
PULL (Pull-Up / Pull-Down Resistors)   R63*   Y  
4x4 Keypad   R115*   Y Y
Optocoupler   R270*     Y
Encoder   R155*     Y
Power Transistors   R230*   Y  
Wired Communication          
Ethernet (LAN)   R245*   Y Y
RS232 (Serial Communication)   R100* Y    
USB UART (Serial/RS232 to USB interface)   R115* Y   Y
USB SPI (SPI to USB interface)   R180*     Y
USB I2C (I2C to USB interface)   R180*     Y
CAN (Controller Area Network)   R230*   Y  
CAN-SPI (CAN with SPI interface)   R270*   Y Y
RS485   R230*   Y Y
LIN (Local Interconnect Network)   R270*   Y  
4-20mA Current Loop   R335*     Y
Fiber Optic   R435*     Y
Wireless Communication          
WiFi   R320*   Y Y
ZigBee / X-Bee   R370*   Y Y
Bluetooth   R500*   Y Y
Bluetooth Low Eneregy   R320*     Y
2.4GHz Radio   R205*     Y
868MHz Radio   R740*     Y
LoRa   R675*     Y
Infra-Red   R120*     Y
IrDA   R330*   Y Y
Energy Harvesting   R500*     Y
GSM / GPRS Communication          
Telit GL865   R630*     Y
Quectel M95   R565*     Y
Quectel UG95 (3G)   R1,100*     Y
SIM800H   R715*     Y
uBlox Leon G-100   R1,100*   Y  
MMC/SD Card   R205*   Y Y
RAM   R190* Y Y Y
Compact Flash   R270*   Y  
SerialFlash   R130*   Y Y
EEPROM   R105*   Y Y
Display / Touch Panel          
LED   R105*   Y  
LED Matrix Display   R190*     Y
Bar Graph (Meter) Display   R155*     Y
7-Segment Display   R130*   Y Y
TFT (Colour display with touch-panel)   R400* Y    
EVE Graphics Controller [i]   R500* Y Y Y
Touch-Panel Controller   R180* Y Y  
LCD/GLCD Display Adapters       Y  
On-Screen-Display   R450*     Y
ADC (Analogue to digital converter)   R310*   Y Y
LDC (Inductance to digital converter)   R450*   Y Y
Potentiometer (8 Potentiometers)   R205*   Y  
Digital Potentiometer   R77*   Y Y
DAC (Digital to analogue converter)   R230*   Y Y
Comparator   R155*     Y
Environment Measurement          
Temperature, Humidity & Pressure Measurement          
Temperature and Humidity   R205* Y Y Y
Thermocouple (Temperature)   R370*     Y
Infra-Red Thermometer   R370*     Y
Pressure Sensor   R320*     Y
GPS   R565*   Y Y
GNSS   R500*     Y
Motion & Position Measurement          
Three-Axis Accelerometer   R245* Y   Y
Tilt Sensor   R165*     Y
Gyroscope   R320*     Y
Compass   R320*     Y
Magnetic Field Detection (Hall Sensor)   R155*     Y
Motion Sensor   R165* Y   Y
Proximity/Distance Sensor   R155*     Y
Altitude Sensor   R185*     Y
Light & Colour Measurement          
Ambient Light Sensor   R205*     Y
Light to Frequency Converter   R230*   Y Y
UV Light Detector   R310*     Y
Color Sensor   R190*     Y
Line Following   R190*     Y
Chemical Detection          
Alcohol Sensor   R190*     Y
Air Quality Sensor   R210*     Y
CO (Carbon Monoxide) Sensor   R210*     Y
LPG (Liquefied Petroleum Gas) Sensor   R190*     Y
Methane Gas Sensor   R190*     Y
Hydrogen Gas Sensor   R190*     Y
Hall Effect Sensor   R155*     Y
Lightning Proximity Detector   R450*     Y
REED Switch   R90*     Y
Real-Time Clock (with PCF8583)   R270*   Y Y
Real-Time Clock (with Dallas DS1307)   R270*   Y Y
Piezo Buzzer (20Hz - 20KHz)   R115*   Y Y
Audio Codec (MP3 / WMA / etc)   R280*   Y Y
FM Tuner   R370*     Y
Voice Recognition   R500*     Y
Text To Speech   R500*     Y
Relay & Motor          
Relay   R230*   Y Y
Bipolar Stepper Motor Driver   R230*   Y Y
DC Motor Driver   R180*     Y
Buggy Car   R1,450*     Y
Haptic Feedback (Vibration)   R295*     Y
Step-down DC-DC converter   R245* Y    
USB Li-Po Charger   R125* Y    
Voltage Translators   R255*   Y  
Current Measurement   R310*     Y
Connectors / Adapters          
PS/2   R64* Y    
Port Expander   R155*   Y Y
RF-ID Reader (125KHz)   R310*   Y  
RF-ID Reader (13.56MHz)   R370*     Y
NFC   R155*     Y
RF Meter   R565*     Y
Capacitive Touch Sensing   R155*     Y
Joystick Input (Hall-Effect Sensor)   R280*     Y
Joystick Input (Analogue)   R255*     Y
PWM (Pulse-Width Modulation)   R190*     Y
Camera   R500*     Y
Fingerprint Sensor   R690*     Y
DALI (Digital Addressable Lighting Interface)   R320*     Y
Unique ID   R115*     Y
3D Gesture Detection / Recognition   R630*   Y  
Heart Rate   R245*     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.