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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)   R66*   Y  
PULL (Pull-Up / Pull-Down Resistors)   R55*   Y  
4x4 Keypad   R145*   Y Y
Optocoupler   R335*     Y
Encoder   R190*     Y
Power Transistors   R200*   Y  
Wired Communication          
Ethernet (LAN)   R215*   Y Y
RS232 (Serial Communication)   R125* Y    
USB UART (Serial/RS232 to USB interface)   R100* Y   Y
USB SPI (SPI to USB interface)   R225*     Y
USB I2C (I2C to USB interface)   R225*     Y
CAN (Controller Area Network)   R290*   Y  
CAN-SPI (CAN with SPI interface)   R235*   Y Y
RS485   R200*   Y Y
LIN (Local Interconnect Network)   R290*   Y  
4-20mA Current Loop   R405*     Y
Fiber Optic   R530*     Y
Wireless Communication          
WiFi   R425*   Y Y
ZigBee / X-Bee   R455*   Y Y
Bluetooth   R610*   Y Y
Bluetooth Low Eneregy   R390*     Y
2.4GHz Radio   R180*     Y
868MHz Radio   R905*     Y
LoRa   R825*     Y
Infra-Red   R105*     Y
IrDA   R405*   Y Y
Energy Harvesting   R610*     Y
GSM / GPRS Communication          
Telit GL865   R535*     Y
Quectel M95   R480*     Y
Quectel UG95 (3G)   R955*     Y
SIM800H   R870*     Y
uBlox Leon G-100   R1,350*   Y  
MMC/SD Card   R180*   Y Y
RAM   R170* Y Y Y
Compact Flash   R335*   Y  
SerialFlash   R160*   Y Y
EEPROM   R89.50*   Y Y
Display / Touch Panel          
LED   R89.50*   Y  
LED Matrix Display   R240*     Y
LED Ring   R255*     Y
Bar Graph (Meter) Display   R190*     Y
7-Segment Display   R160*   Y Y
TFT (Colour display with touch-panel)   R345* Y    
EVE Graphics Controller [i]   R610* Y Y Y
Touch-Panel Controller   R225* Y Y  
LCD/GLCD Display Adapters       Y  
On-Screen-Display   R550*     Y
ADC (Analogue to digital converter)   R270*   Y Y
LDC (Inductance to digital converter)   R550*   Y Y
Potentiometer (8 Potentiometers)   R255*   Y  
Digital Potentiometer   R96*   Y Y
DAC (Digital to analogue converter)   R290*   Y Y
Comparator   R190*     Y
Environment Measurement          
Temperature, Humidity & Pressure Measurement          
Temperature and Humidity   R255* Y Y Y
Thermocouple (Temperature)   R455*     Y
Infra-Red Thermometer   R905*     Y
Pressure Sensor   R390*     Y
GPS   R480*   Y Y
GNSS   R610*     Y
Motion & Position Measurement          
Three-Axis Accelerometer   R305* Y   Y
Tilt Sensor   R205*     Y
Gyroscope   R280*     Y
Compass   R280*     Y
Magnetic Field Detection (Hall Sensor)   R190*     Y
Motion Sensor   R145* Y   Y
Proximity/Distance Sensor   R190*     Y
Altitude Sensor   R160*     Y
Stretch Measurement   R550*     Y
Force & Weight          
Force   R390*     Y
Light & Colour Measurement          
Ambient Light Sensor   R180*     Y
Light to Frequency Converter   R285*   Y Y
UV Light Detector   R385*     Y
Color Sensor   R170*     Y
Line Following   R240*     Y
Chemical Detection          
Alcohol Sensor   R170*     Y
Air Quality Sensor   R265*     Y
Ozone Detection (O3)       Y
CO (Carbon Monoxide) Sensor   R265*     Y
LPG (Liquefied Petroleum Gas) Sensor   R240*     Y
Methane Gas Sensor   R240*     Y
Hydrogen Gas Sensor   R240*     Y
Hall Effect Sensor   R190*     Y
Lightning Proximity Detector   R550*     Y
REED Switch   R110*     Y
Real-Time Clock (with PCF8583)   R335*   Y Y
Real-Time Clock (with Dallas DS1307)   R335*   Y Y
Timer   R290*   Y Y
Piezo Buzzer (20Hz - 20KHz)   R100*   Y Y
Audio Codec (MP3 / WMA / etc)   R245*   Y Y
FM Tuner   R455*     Y
Voice Recognition   R380*     Y
Text To Speech   R610*     Y
Audio Amplifier   R225*     Y
Noise Dectection   R455*     Y
Relay & Motor          
Relay   R290*   Y Y
Bipolar Stepper Motor Driver   R270*   Y Y
DC Motor Driver   R155*     Y
Buggy Car   R1,750*     Y
Haptic Feedback (Vibration)   R370*     Y
Step-down DC-DC converter   R305* Y    
USB Li-Po Charger   R160* Y    
Voltage Translators   R225*   Y  
Current Measurement   R145*     Y
Connectors / Adapters          
PS/2   R80* Y    
Port Expander   R190*   Y Y
RF-ID Reader (125KHz)   R385*   Y  
RF-ID Reader (13.56MHz)   R455*     Y
NFC   R190*     Y
RF Meter   R690*     Y
Capacitive Touch Sensing   R135*     Y
Joystick Input (Hall-Effect Sensor)   R350*     Y
Joystick Input (Analogue)   R320*     Y
PWM (Pulse-Width Modulation)   R240*     Y
Camera   R610*     Y
Fingerprint Sensor   R840*     Y
DALI (Digital Addressable Lighting Interface)   R390*     Y
Unique ID   R145*     Y
3D Gesture Detection / Recognition   R765*   Y  
Heart Rate   R305*     Y
Cap Extend click   R290*     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.