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)		R91*
PULL (Pull-Up / Pull-Down Resistors)		R75.50*
4x4 Keypad		R140*
Optocoupler		R325*
Encoder		R185*
Power Transistors		R275*
Communication
Wired Communication
Ethernet (LAN)		R290*
RS232 (Serial Communication)		R120*
USB UART (Serial/RS232 to USB interface)		R140*
USB SPI (SPI to USB interface)		R215*
USB I2C (I2C to USB interface)		R215*
CAN (Controller Area Network)		R275*
CAN-SPI (CAN with SPI interface)		R325*
RS485		R275*
LIN (Local Interconnect Network)		R325*
4-20mA Current Loop		R400*
Fiber Optic		R525*
Wireless Communication
WiFi		R415*
ZigBee / X-Bee		R445*
Bluetooth		R600*
Bluetooth Low Eneregy		R385*
2.4GHz Radio		R245*
868MHz Radio		R885*
LoRa		R810*
Infra-Red		R145*
IrDA		R400*
Energy Harvesting		R600*
GSM / GPRS Communication
Telit GL865		R755*
Quectel M95		R675*
Quectel UG95 (3G)		R1,300*
SIM800H		R855*
uBlox Leon G-100		R1,300*
Storage
MMC/SD Card		R245*
RAM		R230*
Compact Flash		R325*
SerialFlash		R155*
EEPROM		R125*
Display / Touch Panel
LED		R125*
LED Matrix Display		R230*
Bar Graph (Meter) Display		R185*
7-Segment Display		R155*
TFT (Colour display with touch-panel)		R475*
EVE Graphics Controller [i]		R600*
Touch-Panel Controller		R215*
LCD/GLCD Display Adapters
On-Screen-Display		R540*
Analogue
ADC (Analogue to digital converter)		R370*
LDC (Inductance to digital converter)		R540*
Potentiometer (8 Potentiometers)		R245*
Digital Potentiometer		R92.50*
DAC (Digital to analogue converter)		R275*
Comparator		R185*
Environment Measurement
Temperature, Humidity & Pressure Measurement
Temperature and Humidity		R245*
Thermocouple (Temperature)		R445*
Infra-Red Thermometer		R445*
Pressure Sensor		R385*
GPS
GPS		R675*
GNSS		R600*
Motion & Position Measurement
Three-Axis Accelerometer		R290*
Tilt Sensor		R200*
Gyroscope		R385*
Compass		R385*
Magnetic Field Detection (Hall Sensor)		R185*
Motion Sensor		R200*
Proximity/Distance Sensor		R185*
Altitude Sensor		R225*
Light & Colour Measurement
Ambient Light Sensor		R245*
Light to Frequency Converter		R275*
UV Light Detector		R370*
Color Sensor		R230*
Line Following		R230*
Chemical Detection
Alcohol Sensor		R230*
Air Quality Sensor		R255*
CO (Carbon Monoxide) Sensor		R255*
LPG (Liquefied Petroleum Gas) Sensor		R230*
Methane Gas Sensor		R230*
Hydrogen Gas Sensor		R230*
Magnetics
Hall Effect Sensor		R185*
Lightning Proximity Detector		R540*
REED Switch		R110*
Timekeeping
Real-Time Clock (with PCF8583)		R325*
Real-Time Clock (with Dallas DS1307)		R325*
Audio
Piezo Buzzer (20Hz - 20KHz)		R140*
Audio Codec (MP3 / WMA / etc)		R335*
FM Tuner		R445*
Voice Recognition		R600*
Text To Speech		R600*
Relay & Motor
Relay		R275*
Bipolar Stepper Motor Driver		R275*
DC Motor Driver		R215*
Buggy Car		R1,750*
Haptic Feedback (Vibration)		R355*
Power
Step-down DC-DC converter		R290*
USB Li-Po Charger		R150*
Voltage Translators		R305*
Current Measurement		R370*
Connectors / Adapters
PS/2		R77*
Miscellaneous
Port Expander		R185*
RF-ID Reader (125KHz)		R370*
RF-ID Reader (13.56MHz)		R445*
NFC		R185*
RF Meter		R675*
Capacitive Touch Sensing		R185*
Joystick Input (Hall-Effect Sensor)		R340*
Joystick Input (Analogue)		R310*
PWM (Pulse-Width Modulation)		R230*
Camera		R600*
Fingerprint Sensor		R825*
DALI (Digital Addressable Lighting Interface)		R385*
Unique ID		R140*
3D Gesture Detection / Recognition		R755*
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.