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)		R130*
PULL (Pull-Up / Pull-Down Resistors)		R89.50*
4x4 Keypad		R195*
Optocoupler		R445*
Encoder		R255*
Power Transistors		R230*
Communication
Wired Communication
Ethernet (LAN)		R245*
RS232 (Serial Communication)		R175*
USB UART (Serial/RS232 to USB interface)		R165*
USB SPI (SPI to USB interface)		R255*
USB I2C (I2C to USB interface)		R310*
CAN (Controller Area Network)		R400*
CAN-SPI (CAN with SPI interface)		R385*
RS485		R230*
LIN (Local Interconnect Network)		R385*
4-20mA Current Loop		R395*
Fiber Optic		R605*
Wireless Communication
WiFi		R480*
ZigBee / X-Bee		R680*
Bluetooth		R820*
Bluetooth Low Eneregy		R535*
2.4GHz Radio		R205*
868MHz Radio		R1,050*
LoRa		R945*
Infra-Red		R120*
IrDA		R465*
Energy Harvesting		R840*
GSM / GPRS Communication
Telit GL865		R1,050*
Quectel M95		R925*
Quectel UG95 (3G)		R1,100*
SIM800H		R1,200*
uBlox Leon G-100		R1,550*
Storage
MMC/SD Card		R345*
RAM		R190*
Compact Flash		R385*
SerialFlash		R220*
EEPROM		R145*
Display / Touch Panel
LED		R100*
LED Matrix Display		R275*
LED Ring		R535*
Bar Graph (Meter) Display		R255*
7-Segment Display		R220*
TFT (Colour display with touch-panel)		R395*
EVE Graphics Controller [i]		R840*
Touch-Panel Controller		R305*
LCD/GLCD Display Adapters
On-Screen-Display		R625*
Analogue
ADC (Analogue to digital converter)		R520*
LDC (Inductance to digital converter)		R750*
Potentiometer (8 Potentiometers)		R350*
Digital Potentiometer		R110*
DAC (Digital to analogue converter)		R400*
Comparator		R255*
Environment Measurement
Temperature, Humidity & Pressure Measurement
Temperature and Humidity		R345*
Thermocouple (Temperature)		R625*
Infra-Red Thermometer		R695*
Pressure Sensor		R535*
GPS
GPS		R785*
GNSS		R445*
Motion & Position Measurement
Three-Axis Accelerometer		R255*
Tilt Sensor		R275*
Gyroscope		R320*
Compass		R445*
Magnetic Field Detection (Hall Sensor)		R255*
Motion Sensor		R165*
Proximity/Distance Sensor		R215*
Altitude Sensor		R185*
Stretch Measurement		R1,150*
Force & Weight
Force		R680*
Light & Colour Measurement
Ambient Light Sensor		R205*
Light to Frequency Converter		R325*
UV Light Detector		R520*
Color Sensor		R330*
Line Following		R330*
Chemical Detection
Alcohol Sensor		R330*
Air Quality Sensor		R365*
Ozone Detection (O3)
CO (Carbon Monoxide) Sensor		R365*
LPG (Liquefied Petroleum Gas) Sensor		R330*
Methane Gas Sensor		R330*
Hydrogen Gas Sensor		R330*
Magnetics
Hall Effect Sensor		R255*
Lightning Proximity Detector		R750*
REED Switch		R145*
Timekeeping
Real-Time Clock (with PCF8583)		R385*
Real-Time Clock (with Dallas DS1307)		R385*
Timer		R400*
Audio
Piezo Buzzer (20Hz - 20KHz)		R66*
Audio Codec (MP3 / WMA / etc)		R465*
FM Tuner		R625*
Voice Recognition		R730*
Text To Speech		R960*
Audio Amplifier		R310*
Noise Dectection		R625*
Relay & Motor
Relay		R400*
Bipolar Stepper Motor Driver		R305*
DC Motor Driver		R180*
Buggy Car		R2,400*
Haptic Feedback (Vibration)		R500*
Power
Step-down DC-DC converter		R420*
USB Li-Po Charger		R215*
Voltage Translators		R440*
Current Measurement		R200*
Connectors / Adapters
PS/2		R91.50*
Miscellaneous
Port Expander		R220*
RF-ID Reader (125KHz)		R520*
RF-ID Reader (13.56MHz)		R625*
NFC		R255*
RF Meter		R925*
Capacitive Touch Sensing		R155*
Joystick Input (Hall-Effect Sensor)		R400*
Joystick Input (Analogue)		R535*
PWM (Pulse-Width Modulation)		R330*
Camera		R695*
Fingerprint Sensor		R960*
DALI (Digital Addressable Lighting Interface)		R535*
Unique ID		R200*
3D Gesture Detection / Recognition		R1,050*
Heart Rate		R420*
Cap Extend click		R400*

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.