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)		R145*
PULL (Pull-Up / Pull-Down Resistors)		R71*
4x4 Keypad		R225*
Optocoupler		R505*
Encoder		R290*
Power Transistors		R260*
Communication
Wired Communication
Ethernet (LAN)		R275*
RS232 (Serial Communication)		R195*
USB UART (Serial/RS232 to USB interface)		R185*
USB SPI (SPI to USB interface)		R285*
USB I2C (I2C to USB interface)		R350*
CAN (Controller Area Network)		R455*
CAN-SPI (CAN with SPI interface)		R435*
RS485		R260*
LIN (Local Interconnect Network)		R435*
4-20mA Current Loop		R625*
Fiber Optic		R685*
Wireless Communication
WiFi		R545*
ZigBee / X-Bee		R770*
Bluetooth		R930*
Bluetooth Low Eneregy		R605*
2.4GHz Radio		R230*
868MHz Radio		R1,150*
LoRa		R1,050*
Infra-Red		R140*
IrDA		R525*
Energy Harvesting		R950*
GSM / GPRS Communication
Telit GL865		R1,150*
Quectel M95		R1,050*
Quectel UG95 (3G)		R1,250*
SIM800H		R1,350*
uBlox Leon G-100		R1,750*
Storage
MMC/SD Card		R395*
RAM		R215*
Compact Flash		R435*
SerialFlash		R250*
EEPROM		R165*
Display / Touch Panel
LED		R115*
LED Matrix Display		R310*
LED Ring		R605*
Bar Graph (Meter) Display		R290*
7-Segment Display		R250*
TFT (Colour display with touch-panel)		R450*
EVE Graphics Controller [i]		R950*
Touch-Panel Controller		R345*
LCD/GLCD Display Adapters
On-Screen-Display		R710*
Analogue
ADC (Analogue to digital converter)		R585*
LDC (Inductance to digital converter)		R850*
Potentiometer (8 Potentiometers)		R395*
Digital Potentiometer		R125*
DAC (Digital to analogue converter)		R455*
Comparator		R290*
Environment Measurement
Temperature, Humidity & Pressure Measurement
Temperature and Humidity		R395*
Thermocouple (Temperature)		R710*
Infra-Red Thermometer		R790*
Pressure Sensor		R605*
GPS
GPS		R625*
GNSS		R505*
Motion & Position Measurement
Three-Axis Accelerometer		R290*
Tilt Sensor		R310*
Gyroscope		R360*
Compass		R360*
Magnetic Field Detection (Hall Sensor)		R290*
Motion Sensor		R190*
Proximity/Distance Sensor		R245*
Altitude Sensor		R210*
Stretch Measurement		R1,300*
Force & Weight
Force		R770*
Light & Colour Measurement
Ambient Light Sensor		R230*
Light to Frequency Converter		R370*
UV Light Detector		R585*
Color Sensor		R370*
Line Following		R370*
Chemical Detection
Alcohol Sensor		R370*
Air Quality Sensor		R415*
Ozone Detection (O3)
CO (Carbon Monoxide) Sensor		R415*
LPG (Liquefied Petroleum Gas) Sensor		R370*
Methane Gas Sensor		R370*
Hydrogen Gas Sensor		R370*
Magnetics
Hall Effect Sensor		R290*
Lightning Proximity Detector		R850*
REED Switch		R165*
Timekeeping
Real-Time Clock (with PCF8583)		R435*
Real-Time Clock (with Dallas DS1307)		R435*
Timer		R455*
Audio
Piezo Buzzer (20Hz - 20KHz)		R74.50*
Audio Codec (MP3 / WMA / etc)		R525*
FM Tuner		R710*
Voice Recognition		R830*
Text To Speech		R1,100*
Audio Amplifier		R350*
Noise Dectection		R710*
Relay & Motor
Relay		R455*
Bipolar Stepper Motor Driver		R345*
DC Motor Driver		R205*
Buggy Car		R2,700*
Haptic Feedback (Vibration)		R565*
Power
Step-down DC-DC converter		R475*
USB Li-Po Charger		R245*
Voltage Translators		R495*
Current Measurement		R225*
Connectors / Adapters
PS/2		R105*
Miscellaneous
Port Expander		R250*
RF-ID Reader (125KHz)		R585*
RF-ID Reader (13.56MHz)		R710*
NFC		R290*
RF Meter		R1,050*
Capacitive Touch Sensing		R175*
Joystick Input (Hall-Effect Sensor)		R455*
Joystick Input (Analogue)		R605*
PWM (Pulse-Width Modulation)		R370*
Camera		R790*
Fingerprint Sensor		R1,100*
DALI (Digital Addressable Lighting Interface)		R605*
Unique ID		R225*
3D Gesture Detection / Recognition		R1,150*
Heart Rate		R475*
Cap Extend click		R455*

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.