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)		R90*
PULL (Pull-Up / Pull-Down Resistors)		R75*
4x4 Keypad		R135*
Optocoupler		R320*
Encoder		R185*
Power Transistors		R275*
Communication
Wired Communication
Ethernet (LAN)		R290*
RS232 (Serial Communication)		R120*
USB UART (Serial/RS232 to USB interface)		R135*
USB SPI (SPI to USB interface)		R210*
USB I2C (I2C to USB interface)		R210*
CAN (Controller Area Network)		R275*
CAN-SPI (CAN with SPI interface)		R320*
RS485		R275*
LIN (Local Interconnect Network)		R320*
4-20mA Current Loop		R395*
Fiber Optic		R520*
Wireless Communication
WiFi		R410*
ZigBee / X-Bee		R440*
Bluetooth		R595*
Bluetooth Low Eneregy		R380*
2.4GHz Radio		R245*
868MHz Radio		R880*
LoRa		R805*
Infra-Red		R145*
IrDA		R395*
Energy Harvesting		R595*
GSM / GPRS Communication
Telit GL865		R750*
Quectel M95		R670*
Quectel UG95 (3G)		R1,300*
SIM800H		R850*
uBlox Leon G-100		R1,300*
Storage
MMC/SD Card		R245*
RAM		R230*
Compact Flash		R320*
SerialFlash		R155*
EEPROM		R120*
Display / Touch Panel
LED		R120*
LED Matrix Display		R230*
Bar Graph (Meter) Display		R185*
7-Segment Display		R155*
TFT (Colour display with touch-panel)		R475*
EVE Graphics Controller [i]		R595*
Touch-Panel Controller		R215*
LCD/GLCD Display Adapters
On-Screen-Display		R535*
Analogue
ADC (Analogue to digital converter)		R365*
LDC (Inductance to digital converter)		R535*
Potentiometer (8 Potentiometers)		R245*
Digital Potentiometer		R91.50*
DAC (Digital to analogue converter)		R275*
Comparator		R185*
Environment Measurement
Temperature, Humidity & Pressure Measurement
Temperature and Humidity		R245*
Thermocouple (Temperature)		R440*
Infra-Red Thermometer		R440*
Pressure Sensor		R380*
GPS
GPS		R670*
GNSS		R595*
Motion & Position Measurement
Three-Axis Accelerometer		R290*
Tilt Sensor		R195*
Gyroscope		R380*
Compass		R380*
Magnetic Field Detection (Hall Sensor)		R185*
Motion Sensor		R200*
Proximity/Distance Sensor		R185*
Altitude Sensor		R220*
Light & Colour Measurement
Ambient Light Sensor		R245*
Light to Frequency Converter		R275*
UV Light Detector		R365*
Color Sensor		R230*
Line Following		R230*
Chemical Detection
Alcohol Sensor		R230*
Air Quality Sensor		R250*
CO (Carbon Monoxide) Sensor		R250*
LPG (Liquefied Petroleum Gas) Sensor		R230*
Methane Gas Sensor		R230*
Hydrogen Gas Sensor		R230*
Magnetics
Hall Effect Sensor		R185*
Lightning Proximity Detector		R535*
REED Switch		R105*
Timekeeping
Real-Time Clock (with PCF8583)		R320*
Real-Time Clock (with Dallas DS1307)		R320*
Audio
Piezo Buzzer (20Hz - 20KHz)		R135*
Audio Codec (MP3 / WMA / etc)		R335*
FM Tuner		R440*
Voice Recognition		R595*
Text To Speech		R595*
Relay & Motor
Relay		R275*
Bipolar Stepper Motor Driver		R275*
DC Motor Driver		R215*
Buggy Car		R1,750*
Haptic Feedback (Vibration)		R350*
Power
Step-down DC-DC converter		R290*
USB Li-Po Charger		R150*
Voltage Translators		R305*
Current Measurement		R365*
Connectors / Adapters
PS/2		R76.50*
Miscellaneous
Port Expander		R185*
RF-ID Reader (125KHz)		R365*
RF-ID Reader (13.56MHz)		R440*
NFC		R185*
RF Meter		R670*
Capacitive Touch Sensing		R185*
Joystick Input (Hall-Effect Sensor)		R335*
Joystick Input (Analogue)		R305*
PWM (Pulse-Width Modulation)		R225*
Camera		R595*
Fingerprint Sensor		R820*
DALI (Digital Addressable Lighting Interface)		R380*
Unique ID		R135*
3D Gesture Detection / Recognition		R750*
Heart Rate		R290*

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.