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	General	IDC10	mikroBus
Basic Digital I/O
Input (DIP Switches)		R65.50*
PULL (Pull-Up / Pull-Down Resistors)		R54.50*
4x4 Keypad		R165*
Optocoupler		R390*
Encoder		R225*
Power Transistors		R200*
Communication
Wired Communication
Ethernet (LAN)		R355*
RS232 (Serial Communication)		R145*
USB UART (Serial/RS232 to USB interface)		R165*
USB SPI (SPI to USB interface)		R260*
USB I2C (I2C to USB interface)		R260*
CAN (Controller Area Network)		R335*
CAN-SPI (CAN with SPI interface)		R235*
RS485		R200*
LIN (Local Interconnect Network)		R390*
4-20mA Current Loop		R470*
Fiber Optic		R615*
Wireless Communication
WiFi		R490*
ZigBee / X-Bee		R525*
Bluetooth		R645*
Bluetooth Low Eneregy		R455*
2.4GHz Radio		R180*
868MHz Radio		R1,050*
LoRa		R960*
Infra-Red		R105*
IrDA		R470*
Energy Harvesting		R710*
GSM / GPRS Communication
Telit GL865		R890*
Quectel M95		R800*
Quectel UG95 (3G)		R1,550*
SIM800H		R1,000*
uBlox Leon G-100		R1,550*
Storage
MMC/SD Card		R220*
RAM		R165*
Compact Flash		R390*
SerialFlash		R185*
EEPROM		R89*
Display / Touch Panel
LED		R89*
LED Matrix Display		R165*
Bar Graph (Meter) Display		R225*
7-Segment Display		R185*
TFT (Colour display with touch-panel)		R345*
EVE Graphics Controller [i]		R710*
Touch-Panel Controller		R260*
LCD/GLCD Display Adapters
On-Screen-Display		R635*
Analogue
ADC (Analogue to digital converter)		R265*
LDC (Inductance to digital converter)		R635*
Potentiometer (8 Potentiometers)		R295*
Digital Potentiometer		R110*
DAC (Digital to analogue converter)		R335*
Comparator		R225*
Environment Measurement
Temperature, Humidity & Pressure Measurement
Temperature and Humidity		R295*
Thermocouple (Temperature)		R525*
Infra-Red Thermometer		R1,050*
Pressure Sensor		R455*
GPS
GPS		R480*
GNSS		R710*
Motion & Position Measurement
Three-Axis Accelerometer		R355*
Tilt Sensor		R240*
Gyroscope		R280*
Compass		R280*
Magnetic Field Detection (Hall Sensor)		R225*
Motion Sensor		R145*
Proximity/Distance Sensor		R190*
Altitude Sensor		R160*
Light & Colour Measurement
Ambient Light Sensor		R180*
Light to Frequency Converter		R330*
UV Light Detector		R445*
Color Sensor		R280*
Line Following		R280*
Chemical Detection
Alcohol Sensor		R165*
Air Quality Sensor		R305*
CO (Carbon Monoxide) Sensor		R305*
LPG (Liquefied Petroleum Gas) Sensor		R280*
Methane Gas Sensor		R280*
Hydrogen Gas Sensor		R280*
Magnetics
Hall Effect Sensor		R225*
Lightning Proximity Detector		R635*
REED Switch		R130*
Timekeeping
Real-Time Clock (with PCF8583)		R235*
Real-Time Clock (with Dallas DS1307)		R390*
Audio
Piezo Buzzer (20Hz - 20KHz)		R100*
Audio Codec (MP3 / WMA / etc)		R405*
FM Tuner		R525*
Voice Recognition		R710*
Text To Speech		R710*
Relay & Motor
Relay		R335*
Bipolar Stepper Motor Driver		R265*
DC Motor Driver		R260*
Buggy Car		R2,000*
Haptic Feedback (Vibration)		R425*
Power
Step-down DC-DC converter		R355*
USB Li-Po Charger		R185*
Voltage Translators		R220*
Current Measurement		R265*
Connectors / Adapters
PS/2		R93*
Miscellaneous
Port Expander		R225*
RF-ID Reader (125KHz)		R445*
RF-ID Reader (13.56MHz)		R525*
NFC		R225*
RF Meter		R800*
Capacitive Touch Sensing		R135*
Joystick Input (Hall-Effect Sensor)		R410*
Joystick Input (Analogue)		R370*
PWM (Pulse-Width Modulation)		R275*
Camera		R710*
Fingerprint Sensor		R975*
DALI (Digital Addressable Lighting Interface)		R455*
Unique ID		R165*
3D Gesture Detection / Recognition		R890*
Heart Rate		R355*

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. Example: 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. Example: 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. Downloads: mikroBus Specification Proteus mikroBus Footprint Example: A mikroBus WiFi PLUS click accessory board, connected to a Breeze board.