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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)   R120*   Y  
PULL (Pull-Up / Pull-Down Resistors)   R69.50*   Y  
4x4 Keypad   R180*   Y Y
Optocoupler   R425*     Y
Encoder   R245*     Y
Power Transistors   R255*   Y  
Wired Communication          
Ethernet (LAN)   R270*   Y Y
RS232 (Serial Communication)   R160* Y    
USB UART (Serial/RS232 to USB interface)   R180* Y   Y
USB SPI (SPI to USB interface)   R280*     Y
USB I2C (I2C to USB interface)   R280*     Y
CAN (Controller Area Network)   R365*   Y  
CAN-SPI (CAN with SPI interface)   R295*   Y Y
RS485   R255*   Y Y
LIN (Local Interconnect Network)   R365*   Y  
4-20mA Current Loop   R515*     Y
Fiber Optic   R670*     Y
Wireless Communication          
WiFi   R535*   Y Y
ZigBee / X-Bee   R710*   Y Y
Bluetooth   R815*   Y Y
Bluetooth Low Eneregy   R495*     Y
2.4GHz Radio   R225*     Y
868MHz Radio   R1,150*     Y
LoRa   R1,050*     Y
Infra-Red   R135*     Y
IrDA   R510*   Y Y
Energy Harvesting   R770*     Y
GSM / GPRS Communication          
Telit GL865   R970*     Y
Quectel M95   R870*     Y
Quectel UG95 (3G)   R1,200*     Y
SIM800H   R1,100*     Y
uBlox Leon G-100   R1,700*   Y  
MMC/SD Card   R325*   Y Y
RAM   R210* Y Y Y
Compact Flash   R425*   Y  
SerialFlash   R200*   Y Y
EEPROM   R160*   Y Y
Display / Touch Panel          
LED   R115*   Y  
LED Matrix Display   R305*     Y
LED Ring   R495*     Y
Bar Graph (Meter) Display   R245*     Y
7-Segment Display   R200*   Y Y
TFT (Colour display with touch-panel)   R440* Y    
EVE Graphics Controller [i]   R770* Y Y Y
Touch-Panel Controller   R285* Y Y  
LCD/GLCD Display Adapters       Y  
On-Screen-Display   R690*     Y
ADC (Analogue to digital converter)   R485*   Y Y
LDC (Inductance to digital converter)   R690*   Y Y
Potentiometer (8 Potentiometers)   R325*   Y  
Digital Potentiometer   R120*   Y Y
DAC (Digital to analogue converter)   R365*   Y Y
Comparator   R245*     Y
Environment Measurement          
Temperature, Humidity & Pressure Measurement          
Temperature and Humidity   R325* Y Y Y
Thermocouple (Temperature)   R575*     Y
Infra-Red Thermometer   R1,150*     Y
Pressure Sensor   R495*     Y
GPS   R610*   Y Y
GNSS   R770*     Y
Motion & Position Measurement          
Three-Axis Accelerometer   R385* Y   Y
Tilt Sensor   R260*     Y
Gyroscope   R355*     Y
Compass   R355*     Y
Magnetic Field Detection (Hall Sensor)   R245*     Y
Motion Sensor   R185* Y   Y
Proximity/Distance Sensor   R240*     Y
Altitude Sensor   R205*     Y
Stretch Measurement   R1,100*     Y
Force & Weight          
Force   R635*     Y
Light & Colour Measurement          
Ambient Light Sensor   R225*     Y
Light to Frequency Converter   R360*   Y Y
UV Light Detector   R485*     Y
Color Sensor   R305*     Y
Line Following   R305*     Y
Chemical Detection          
Alcohol Sensor   R305*     Y
Air Quality Sensor   R335*     Y
Ozone Detection (O3)       Y
CO (Carbon Monoxide) Sensor   R335*     Y
LPG (Liquefied Petroleum Gas) Sensor   R305*     Y
Methane Gas Sensor   R305*     Y
Hydrogen Gas Sensor   R305*     Y
Hall Effect Sensor   R245*     Y
Lightning Proximity Detector   R690*     Y
REED Switch   R140*     Y
Real-Time Clock (with PCF8583)   R425*   Y Y
Real-Time Clock (with Dallas DS1307)   R425*   Y Y
Timer   R365*   Y Y
Piezo Buzzer (20Hz - 20KHz)   R60.50*   Y Y
Audio Codec (MP3 / WMA / etc)   R445*   Y Y
FM Tuner   R575*     Y
Voice Recognition   R670*     Y
Text To Speech   R910*     Y
Audio Amplifier   R285*     Y
Noise Dectection   R575*     Y
Relay & Motor          
Relay   R365*   Y Y
Bipolar Stepper Motor Driver   R340*   Y Y
DC Motor Driver   R200*     Y
Buggy Car   R2,200*     Y
Haptic Feedback (Vibration)   R465*     Y
Step-down DC-DC converter   R385* Y    
USB Li-Po Charger   R200* Y    
Voltage Translators   R405*   Y  
Current Measurement   R180*     Y
Connectors / Adapters          
PS/2   R100* Y    
Port Expander   R245*   Y Y
RF-ID Reader (125KHz)   R485*   Y  
RF-ID Reader (13.56MHz)   R575*     Y
NFC   R245*     Y
RF Meter   R870*     Y
Capacitive Touch Sensing   R170*     Y
Joystick Input (Hall-Effect Sensor)   R445*     Y
Joystick Input (Analogue)   R495*     Y
PWM (Pulse-Width Modulation)   R300*     Y
Camera   R770*     Y
Fingerprint Sensor   R1,050*     Y
DALI (Digital Addressable Lighting Interface)   R495*     Y
Unique ID   R180*     Y
3D Gesture Detection / Recognition   R970*   Y  
Heart Rate   R385*     Y
Cap Extend click   R365*     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.