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)		R94*
PULL (Pull-Up / Pull-Down Resistors)		R78*
4x4 Keypad		R145*
Optocoupler		R335*
Encoder		R190*
Power Transistors		R285*
Communication
Wired Communication
Ethernet (LAN)		R300*
RS232 (Serial Communication)		R125*
USB UART (Serial/RS232 to USB interface)		R145*
USB SPI (SPI to USB interface)		R220*
USB I2C (I2C to USB interface)		R220*
CAN (Controller Area Network)		R285*
CAN-SPI (CAN with SPI interface)		R335*
RS485		R285*
LIN (Local Interconnect Network)		R335*
4-20mA Current Loop		R415*
Fiber Optic		R540*
Wireless Communication
WiFi		R430*
ZigBee / X-Bee		R460*
Bluetooth		R620*
Bluetooth Low Eneregy		R395*
2.4GHz Radio		R255*
868MHz Radio		R915*
LoRa		R840*
Infra-Red		R150*
IrDA		R410*
Energy Harvesting		R620*
GSM / GPRS Communication
Telit GL865		R780*
Quectel M95		R700*
Quectel UG95 (3G)		R1,350*
SIM800H		R885*
uBlox Leon G-100		R1,350*
Storage
MMC/SD Card		R255*
RAM		R240*
Compact Flash		R335*
SerialFlash		R160*
EEPROM		R125*
Display / Touch Panel
LED		R125*
LED Matrix Display		R240*
Bar Graph (Meter) Display		R190*
7-Segment Display		R160*
TFT (Colour display with touch-panel)		R495*
EVE Graphics Controller [i]		R620*
Touch-Panel Controller		R225*
LCD/GLCD Display Adapters
On-Screen-Display		R555*
Analogue
ADC (Analogue to digital converter)		R380*
LDC (Inductance to digital converter)		R555*
Potentiometer (8 Potentiometers)		R255*
Digital Potentiometer		R95.50*
DAC (Digital to analogue converter)		R285*
Comparator		R190*
Environment Measurement
Temperature, Humidity & Pressure Measurement
Temperature and Humidity		R255*
Thermocouple (Temperature)		R460*
Infra-Red Thermometer		R460*
Pressure Sensor		R395*
GPS
GPS		R700*
GNSS		R620*
Motion & Position Measurement
Three-Axis Accelerometer		R300*
Tilt Sensor		R205*
Gyroscope		R395*
Compass		R395*
Magnetic Field Detection (Hall Sensor)		R190*
Motion Sensor		R205*
Proximity/Distance Sensor		R190*
Altitude Sensor		R230*
Light & Colour Measurement
Ambient Light Sensor		R255*
Light to Frequency Converter		R285*
UV Light Detector		R380*
Color Sensor		R240*
Line Following		R240*
Chemical Detection
Alcohol Sensor		R240*
Air Quality Sensor		R260*
CO (Carbon Monoxide) Sensor		R260*
LPG (Liquefied Petroleum Gas) Sensor		R240*
Methane Gas Sensor		R240*
Hydrogen Gas Sensor		R240*
Magnetics
Hall Effect Sensor		R190*
Lightning Proximity Detector		R555*
REED Switch		R110*
Timekeeping
Real-Time Clock (with PCF8583)		R335*
Real-Time Clock (with Dallas DS1307)		R335*
Audio
Piezo Buzzer (20Hz - 20KHz)		R145*
Audio Codec (MP3 / WMA / etc)		R350*
FM Tuner		R460*
Voice Recognition		R620*
Text To Speech		R620*
Relay & Motor
Relay		R285*
Bipolar Stepper Motor Driver		R285*
DC Motor Driver		R225*
Buggy Car		R1,800*
Haptic Feedback (Vibration)		R365*
Power
Step-down DC-DC converter		R300*
USB Li-Po Charger		R155*
Voltage Translators		R315*
Current Measurement		R380*
Connectors / Adapters
PS/2		R79.50*
Miscellaneous
Port Expander		R190*
RF-ID Reader (125KHz)		R380*
RF-ID Reader (13.56MHz)		R460*
NFC		R190*
RF Meter		R700*
Capacitive Touch Sensing		R190*
Joystick Input (Hall-Effect Sensor)		R350*
Joystick Input (Analogue)		R320*
PWM (Pulse-Width Modulation)		R235*
Camera		R620*
Fingerprint Sensor		R855*
DALI (Digital Addressable Lighting Interface)		R395*
Unique ID		R145*
3D Gesture Detection / Recognition		R780*
Heart Rate		R300*

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.