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)		R80*
PULL (Pull-Up / Pull-Down Resistors)		R66.50*
4x4 Keypad		R120*
Optocoupler		R285*
Encoder		R165*
Power Transistors		R245*
Communication
Wired Communication
Ethernet (LAN)		R260*
RS232 (Serial Communication)		R105*
USB UART (Serial/RS232 to USB interface)		R120*
USB SPI (SPI to USB interface)		R190*
USB I2C (I2C to USB interface)		R190*
CAN (Controller Area Network)		R245*
CAN-SPI (CAN with SPI interface)		R285*
RS485		R245*
LIN (Local Interconnect Network)		R285*
4-20mA Current Loop		R355*
Fiber Optic		R460*
Wireless Communication
WiFi		R340*
ZigBee / X-Bee		R395*
Bluetooth		R530*
Bluetooth Low Eneregy		R340*
2.4GHz Radio		R220*
868MHz Radio		R785*
LoRa		R715*
Infra-Red		R130*
IrDA		R350*
Energy Harvesting		R530*
GSM / GPRS Communication
Telit GL865		R665*
Quectel M95		R600*
Quectel UG95 (3G)		R1,150*
SIM800H		R755*
uBlox Leon G-100		R1,150*
Storage
MMC/SD Card		R220*
RAM		R205*
Compact Flash		R285*
SerialFlash		R135*
EEPROM		R110*
Display / Touch Panel
LED		R110*
LED Matrix Display		R205*
Bar Graph (Meter) Display		R165*
7-Segment Display		R135*
TFT (Colour display with touch-panel)		R420*
EVE Graphics Controller [i]		R530*
Touch-Panel Controller		R190*
LCD/GLCD Display Adapters
On-Screen-Display		R475*
Analogue
ADC (Analogue to digital converter)		R325*
LDC (Inductance to digital converter)		R475*
Potentiometer (8 Potentiometers)		R220*
Digital Potentiometer		R81.50*
DAC (Digital to analogue converter)		R245*
Comparator		R165*
Environment Measurement
Temperature, Humidity & Pressure Measurement
Temperature and Humidity		R220*
Thermocouple (Temperature)		R395*
Infra-Red Thermometer		R395*
Pressure Sensor		R340*
GPS
GPS		R600*
GNSS		R530*
Motion & Position Measurement
Three-Axis Accelerometer		R260*
Tilt Sensor		R175*
Gyroscope		R340*
Compass		R340*
Magnetic Field Detection (Hall Sensor)		R165*
Motion Sensor		R175*
Proximity/Distance Sensor		R165*
Altitude Sensor		R195*
Light & Colour Measurement
Ambient Light Sensor		R220*
Light to Frequency Converter		R245*
UV Light Detector		R325*
Color Sensor		R205*
Line Following		R205*
Chemical Detection
Alcohol Sensor		R205*
Air Quality Sensor		R225*
CO (Carbon Monoxide) Sensor		R225*
LPG (Liquefied Petroleum Gas) Sensor		R205*
Methane Gas Sensor		R205*
Hydrogen Gas Sensor		R205*
Magnetics
Hall Effect Sensor		R165*
Lightning Proximity Detector		R475*
REED Switch		R95*
Timekeeping
Real-Time Clock (with PCF8583)		R285*
Real-Time Clock (with Dallas DS1307)		R285*
Audio
Piezo Buzzer (20Hz - 20KHz)		R120*
Audio Codec (MP3 / WMA / etc)		R300*
FM Tuner		R395*
Voice Recognition		R530*
Text To Speech		R530*
Relay & Motor
Relay		R245*
Bipolar Stepper Motor Driver		R245*
DC Motor Driver		R190*
Buggy Car		R1,550*
Haptic Feedback (Vibration)		R315*
Power
Step-down DC-DC converter		R260*
USB Li-Po Charger		R135*
Voltage Translators		R270*
Current Measurement		R325*
Connectors / Adapters
PS/2		R68*
Miscellaneous
Port Expander		R165*
RF-ID Reader (125KHz)		R325*
RF-ID Reader (13.56MHz)		R395*
NFC		R165*
RF Meter		R600*
Capacitive Touch Sensing		R165*
Joystick Input (Hall-Effect Sensor)		R300*
Joystick Input (Analogue)		R270*
PWM (Pulse-Width Modulation)		R205*
Camera		R530*
Fingerprint Sensor		R730*
DALI (Digital Addressable Lighting Interface)		R340*
Unique ID		R120*
3D Gesture Detection / Recognition		R665*
Heart Rate		R260*

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.