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)		R86*
PULL (Pull-Up / Pull-Down Resistors)		R71.50*
4x4 Keypad		R130*
Optocoupler		R305*
Encoder		R175*
Power Transistors		R265*
Communication
Wired Communication
Ethernet (LAN)		R275*
RS232 (Serial Communication)		R115*
USB UART (Serial/RS232 to USB interface)		R130*
USB SPI (SPI to USB interface)		R205*
USB I2C (I2C to USB interface)		R205*
CAN (Controller Area Network)		R265*
CAN-SPI (CAN with SPI interface)		R305*
RS485		R265*
LIN (Local Interconnect Network)		R305*
4-20mA Current Loop		R380*
Fiber Optic		R495*
Wireless Communication
WiFi		R290*
ZigBee / X-Bee		R425*
Bluetooth		R570*
Bluetooth Low Eneregy		R365*
2.4GHz Radio		R235*
868MHz Radio		R840*
LoRa		R770*
Infra-Red		R140*
IrDA		R380*
Energy Harvesting		R570*
GSM / GPRS Communication
Telit GL865		R715*
Quectel M95		R640*
Quectel UG95 (3G)		R1,250*
SIM800H		R815*
uBlox Leon G-100		R1,250*
Storage
MMC/SD Card		R235*
RAM		R220*
Compact Flash		R305*
SerialFlash		R145*
EEPROM		R115*
Display / Touch Panel
LED		R115*
LED Matrix Display		R220*
Bar Graph (Meter) Display		R175*
7-Segment Display		R145*
TFT (Colour display with touch-panel)		R450*
EVE Graphics Controller [i]		R570*
Touch-Panel Controller		R205*
LCD/GLCD Display Adapters
On-Screen-Display		R510*
Analogue
ADC (Analogue to digital converter)		R350*
LDC (Inductance to digital converter)		R510*
Potentiometer (8 Potentiometers)		R235*
Digital Potentiometer		R87.50*
DAC (Digital to analogue converter)		R265*
Comparator		R175*
Environment Measurement
Temperature, Humidity & Pressure Measurement
Temperature and Humidity		R235*
Thermocouple (Temperature)		R425*
Infra-Red Thermometer		R425*
Pressure Sensor		R365*
GPS
GPS		R640*
GNSS		R570*
Motion & Position Measurement
Three-Axis Accelerometer		R275*
Tilt Sensor		R190*
Gyroscope		R365*
Compass		R365*
Magnetic Field Detection (Hall Sensor)		R175*
Motion Sensor		R190*
Proximity/Distance Sensor		R175*
Altitude Sensor		R210*
Light & Colour Measurement
Ambient Light Sensor		R235*
Light to Frequency Converter		R260*
UV Light Detector		R350*
Color Sensor		R220*
Line Following		R220*
Chemical Detection
Alcohol Sensor		R220*
Air Quality Sensor		R240*
CO (Carbon Monoxide) Sensor		R240*
LPG (Liquefied Petroleum Gas) Sensor		R220*
Methane Gas Sensor		R220*
Hydrogen Gas Sensor		R220*
Magnetics
Hall Effect Sensor		R175*
Lightning Proximity Detector		R510*
REED Switch		R100*
Timekeeping
Real-Time Clock (with PCF8583)		R305*
Real-Time Clock (with Dallas DS1307)		R305*
Audio
Piezo Buzzer (20Hz - 20KHz)		R130*
Audio Codec (MP3 / WMA / etc)		R320*
FM Tuner		R425*
Voice Recognition		R570*
Text To Speech		R570*
Relay & Motor
Relay		R265*
Bipolar Stepper Motor Driver		R265*
DC Motor Driver		R205*
Buggy Car		R1,650*
Haptic Feedback (Vibration)		R335*
Power
Step-down DC-DC converter		R275*
USB Li-Po Charger		R145*
Voltage Translators		R290*
Current Measurement		R350*
Connectors / Adapters
PS/2		R73*
Miscellaneous
Port Expander		R175*
RF-ID Reader (125KHz)		R350*
RF-ID Reader (13.56MHz)		R425*
NFC		R175*
RF Meter		R640*
Capacitive Touch Sensing		R175*
Joystick Input (Hall-Effect Sensor)		R320*
Joystick Input (Analogue)		R290*
PWM (Pulse-Width Modulation)		R215*
Camera		R570*
Fingerprint Sensor		R785*
DALI (Digital Addressable Lighting Interface)		R365*
Unique ID		R130*
3D Gesture Detection / Recognition		R715*
Heart Rate		R275*

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.