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)		R91*
4x4 Keypad		R200*
Optocoupler		R455*
Encoder		R260*
Power Transistors		R235*
Communication
Wired Communication
Ethernet (LAN)		R245*
RS232 (Serial Communication)		R175*
USB UART (Serial/RS232 to USB interface)		R165*
USB SPI (SPI to USB interface)		R260*
USB I2C (I2C to USB interface)		R315*
CAN (Controller Area Network)		R410*
CAN-SPI (CAN with SPI interface)		R390*
RS485		R235*
LIN (Local Interconnect Network)		R390*
4-20mA Current Loop		R405*
Fiber Optic		R615*
Wireless Communication
WiFi		R490*
ZigBee / X-Bee		R690*
Bluetooth		R835*
Bluetooth Low Eneregy		R545*
2.4GHz Radio		R210*
868MHz Radio		R1,050*
LoRa		R960*
Infra-Red		R125*
IrDA		R470*
Energy Harvesting		R855*
GSM / GPRS Communication
Telit GL865		R1,050*
Quectel M95		R940*
Quectel UG95 (3G)		R1,100*
SIM800H		R1,200*
uBlox Leon G-100		R1,550*
Storage
MMC/SD Card		R355*
RAM		R195*
Compact Flash		R390*
SerialFlash		R225*
EEPROM		R150*
Display / Touch Panel
LED		R105*
LED Matrix Display		R280*
LED Ring		R545*
Bar Graph (Meter) Display		R260*
7-Segment Display		R225*
TFT (Colour display with touch-panel)		R405*
EVE Graphics Controller [i]		R855*
Touch-Panel Controller		R310*
LCD/GLCD Display Adapters
On-Screen-Display		R635*
Analogue
ADC (Analogue to digital converter)		R525*
LDC (Inductance to digital converter)		R760*
Potentiometer (8 Potentiometers)		R355*
Digital Potentiometer		R110*
DAC (Digital to analogue converter)		R410*
Comparator		R260*
Environment Measurement
Temperature, Humidity & Pressure Measurement
Temperature and Humidity		R355*
Thermocouple (Temperature)		R635*
Infra-Red Thermometer		R710*
Pressure Sensor		R545*
GPS
GPS		R800*
GNSS		R455*
Motion & Position Measurement
Three-Axis Accelerometer		R260*
Tilt Sensor		R280*
Gyroscope		R325*
Compass		R455*
Magnetic Field Detection (Hall Sensor)		R260*
Motion Sensor		R170*
Proximity/Distance Sensor		R220*
Altitude Sensor		R190*
Stretch Measurement		R1,200*
Force & Weight
Force		R690*
Light & Colour Measurement
Ambient Light Sensor		R210*
Light to Frequency Converter		R330*
UV Light Detector		R525*
Color Sensor		R335*
Line Following		R335*
Chemical Detection
Alcohol Sensor		R335*
Air Quality Sensor		R370*
Ozone Detection (O3)
CO (Carbon Monoxide) Sensor		R370*
LPG (Liquefied Petroleum Gas) Sensor		R335*
Methane Gas Sensor		R335*
Hydrogen Gas Sensor		R335*
Magnetics
Hall Effect Sensor		R260*
Lightning Proximity Detector		R760*
REED Switch		R150*
Timekeeping
Real-Time Clock (with PCF8583)		R390*
Real-Time Clock (with Dallas DS1307)		R390*
Timer		R410*
Audio
Piezo Buzzer (20Hz - 20KHz)		R67*
Audio Codec (MP3 / WMA / etc)		R470*
FM Tuner		R635*
Voice Recognition		R745*
Text To Speech		R975*
Audio Amplifier		R315*
Noise Dectection		R635*
Relay & Motor
Relay		R410*
Bipolar Stepper Motor Driver		R310*
DC Motor Driver		R180*
Buggy Car		R2,400*
Haptic Feedback (Vibration)		R510*
Power
Step-down DC-DC converter		R425*
USB Li-Po Charger		R220*
Voltage Translators		R445*
Current Measurement		R205*
Connectors / Adapters
PS/2		R93*
Miscellaneous
Port Expander		R225*
RF-ID Reader (125KHz)		R525*
RF-ID Reader (13.56MHz)		R635*
NFC		R260*
RF Meter		R940*
Capacitive Touch Sensing		R155*
Joystick Input (Hall-Effect Sensor)		R410*
Joystick Input (Analogue)		R545*
PWM (Pulse-Width Modulation)		R335*
Camera		R710*
Fingerprint Sensor		R975*
DALI (Digital Addressable Lighting Interface)		R545*
Unique ID		R205*
3D Gesture Detection / Recognition		R1,050*
Heart Rate		R425*
Cap Extend click		R410*

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.