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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)   R91*   Y  
PULL (Pull-Up / Pull-Down Resistors)   R75.50*   Y  
4x4 Keypad   R140*   Y Y
Optocoupler   R325*     Y
Encoder   R185*     Y
Power Transistors   R275*   Y  
Wired Communication          
Ethernet (LAN)   R290*   Y Y
RS232 (Serial Communication)   R120* Y    
USB UART (Serial/RS232 to USB interface)   R140* Y   Y
USB SPI (SPI to USB interface)   R215*     Y
USB I2C (I2C to USB interface)   R215*     Y
CAN (Controller Area Network)   R275*   Y  
CAN-SPI (CAN with SPI interface)   R325*   Y Y
RS485   R275*   Y Y
LIN (Local Interconnect Network)   R325*   Y  
4-20mA Current Loop   R400*     Y
Fiber Optic   R525*     Y
Wireless Communication          
WiFi   R415*   Y Y
ZigBee / X-Bee   R445*   Y Y
Bluetooth   R600*   Y Y
Bluetooth Low Eneregy   R385*     Y
2.4GHz Radio   R245*     Y
868MHz Radio   R885*     Y
LoRa   R810*     Y
Infra-Red   R145*     Y
IrDA   R400*   Y Y
Energy Harvesting   R600*     Y
GSM / GPRS Communication          
Telit GL865   R755*     Y
Quectel M95   R675*     Y
Quectel UG95 (3G)   R1,300*     Y
SIM800H   R855*     Y
uBlox Leon G-100   R1,300*   Y  
MMC/SD Card   R245*   Y Y
RAM   R230* Y Y Y
Compact Flash   R325*   Y  
SerialFlash   R155*   Y Y
EEPROM   R125*   Y Y
Display / Touch Panel          
LED   R125*   Y  
LED Matrix Display   R230*     Y
Bar Graph (Meter) Display   R185*     Y
7-Segment Display   R155*   Y Y
TFT (Colour display with touch-panel)   R475* Y    
EVE Graphics Controller [i]   R600* Y Y Y
Touch-Panel Controller   R215* Y Y  
LCD/GLCD Display Adapters       Y  
On-Screen-Display   R540*     Y
ADC (Analogue to digital converter)   R370*   Y Y
LDC (Inductance to digital converter)   R540*   Y Y
Potentiometer (8 Potentiometers)   R245*   Y  
Digital Potentiometer   R92.50*   Y Y
DAC (Digital to analogue converter)   R275*   Y Y
Comparator   R185*     Y
Environment Measurement          
Temperature, Humidity & Pressure Measurement          
Temperature and Humidity   R245* Y Y Y
Thermocouple (Temperature)   R445*     Y
Infra-Red Thermometer   R445*     Y
Pressure Sensor   R385*     Y
GPS   R675*   Y Y
GNSS   R600*     Y
Motion & Position Measurement          
Three-Axis Accelerometer   R290* Y   Y
Tilt Sensor   R200*     Y
Gyroscope   R385*     Y
Compass   R385*     Y
Magnetic Field Detection (Hall Sensor)   R185*     Y
Motion Sensor   R200* Y   Y
Proximity/Distance Sensor   R185*     Y
Altitude Sensor   R225*     Y
Light & Colour Measurement          
Ambient Light Sensor   R245*     Y
Light to Frequency Converter   R275*   Y Y
UV Light Detector   R370*     Y
Color Sensor   R230*     Y
Line Following   R230*     Y
Chemical Detection          
Alcohol Sensor   R230*     Y
Air Quality Sensor   R255*     Y
CO (Carbon Monoxide) Sensor   R255*     Y
LPG (Liquefied Petroleum Gas) Sensor   R230*     Y
Methane Gas Sensor   R230*     Y
Hydrogen Gas Sensor   R230*     Y
Hall Effect Sensor   R185*     Y
Lightning Proximity Detector   R540*     Y
REED Switch   R110*     Y
Real-Time Clock (with PCF8583)   R325*   Y Y
Real-Time Clock (with Dallas DS1307)   R325*   Y Y
Piezo Buzzer (20Hz - 20KHz)   R140*   Y Y
Audio Codec (MP3 / WMA / etc)   R335*   Y Y
FM Tuner   R445*     Y
Voice Recognition   R600*     Y
Text To Speech   R600*     Y
Relay & Motor          
Relay   R275*   Y Y
Bipolar Stepper Motor Driver   R275*   Y Y
DC Motor Driver   R215*     Y
Buggy Car   R1,750*     Y
Haptic Feedback (Vibration)   R355*     Y
Step-down DC-DC converter   R290* Y    
USB Li-Po Charger   R150* Y    
Voltage Translators   R305*   Y  
Current Measurement   R370*     Y
Connectors / Adapters          
PS/2   R77* Y    
Port Expander   R185*   Y Y
RF-ID Reader (125KHz)   R370*   Y  
RF-ID Reader (13.56MHz)   R445*     Y
NFC   R185*     Y
RF Meter   R675*     Y
Capacitive Touch Sensing   R185*     Y
Joystick Input (Hall-Effect Sensor)   R340*     Y
Joystick Input (Analogue)   R310*     Y
PWM (Pulse-Width Modulation)   R230*     Y
Camera   R600*     Y
Fingerprint Sensor   R825*     Y
DALI (Digital Addressable Lighting Interface)   R385*     Y
Unique ID   R140*     Y
3D Gesture Detection / Recognition   R755*   Y  
Heart Rate   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.