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)		R97*
PULL (Pull-Up / Pull-Down Resistors)		R80.50*
4x4 Keypad		R150*
Optocoupler		R345*
Encoder		R200*
Power Transistors		R295*
Communication
Wired Communication
Ethernet (LAN)		R315*
RS232 (Serial Communication)		R130*
USB UART (Serial/RS232 to USB interface)		R150*
USB SPI (SPI to USB interface)		R230*
USB I2C (I2C to USB interface)		R230*
CAN (Controller Area Network)		R295*
CAN-SPI (CAN with SPI interface)		R345*
RS485		R295*
LIN (Local Interconnect Network)		R345*
4-20mA Current Loop		R430*
Fiber Optic		R560*
Wireless Communication
WiFi		R330*
ZigBee / X-Bee		R480*
Bluetooth		R645*
Bluetooth Low Eneregy		R410*
2.4GHz Radio		R265*
868MHz Radio		R950*
LoRa		R870*
Infra-Red		R155*
IrDA		R425*
Energy Harvesting		R645*
GSM / GPRS Communication
Telit GL865		R805*
Quectel M95		R725*
Quectel UG95 (3G)		R1,400*
SIM800H		R920*
uBlox Leon G-100		R1,400*
Storage
MMC/SD Card		R265*
RAM		R245*
Compact Flash		R345*
SerialFlash		R165*
EEPROM		R130*
Display / Touch Panel
LED		R130*
LED Matrix Display		R245*
Bar Graph (Meter) Display		R200*
7-Segment Display		R165*
TFT (Colour display with touch-panel)		R510*
EVE Graphics Controller [i]		R645*
Touch-Panel Controller		R230*
LCD/GLCD Display Adapters
On-Screen-Display		R575*
Analogue
ADC (Analogue to digital converter)		R395*
LDC (Inductance to digital converter)		R575*
Potentiometer (8 Potentiometers)		R265*
Digital Potentiometer		R99*
DAC (Digital to analogue converter)		R295*
Comparator		R200*
Environment Measurement
Temperature, Humidity & Pressure Measurement
Temperature and Humidity		R265*
Thermocouple (Temperature)		R480*
Infra-Red Thermometer		R480*
Pressure Sensor		R410*
GPS
GPS		R725*
GNSS		R645*
Motion & Position Measurement
Three-Axis Accelerometer		R315*
Tilt Sensor		R215*
Gyroscope		R410*
Compass		R410*
Magnetic Field Detection (Hall Sensor)		R200*
Motion Sensor		R215*
Proximity/Distance Sensor		R200*
Altitude Sensor		R240*
Light & Colour Measurement
Ambient Light Sensor		R265*
Light to Frequency Converter		R295*
UV Light Detector		R395*
Color Sensor		R245*
Line Following		R245*
Chemical Detection
Alcohol Sensor		R245*
Air Quality Sensor		R270*
CO (Carbon Monoxide) Sensor		R270*
LPG (Liquefied Petroleum Gas) Sensor		R245*
Methane Gas Sensor		R245*
Hydrogen Gas Sensor		R245*
Magnetics
Hall Effect Sensor		R200*
Lightning Proximity Detector		R575*
REED Switch		R115*
Timekeeping
Real-Time Clock (with PCF8583)		R345*
Real-Time Clock (with Dallas DS1307)		R345*
Audio
Piezo Buzzer (20Hz - 20KHz)		R150*
Audio Codec (MP3 / WMA / etc)		R360*
FM Tuner		R480*
Voice Recognition		R645*
Text To Speech		R645*
Relay & Motor
Relay		R295*
Bipolar Stepper Motor Driver		R295*
DC Motor Driver		R230*
Buggy Car		R1,850*
Haptic Feedback (Vibration)		R380*
Power
Step-down DC-DC converter		R315*
USB Li-Po Charger		R165*
Voltage Translators		R330*
Current Measurement		R395*
Connectors / Adapters
PS/2		R82.50*
Miscellaneous
Port Expander		R200*
RF-ID Reader (125KHz)		R395*
RF-ID Reader (13.56MHz)		R480*
NFC		R200*
RF Meter		R725*
Capacitive Touch Sensing		R200*
Joystick Input (Hall-Effect Sensor)		R365*
Joystick Input (Analogue)		R330*
PWM (Pulse-Width Modulation)		R245*
Camera		R645*
Fingerprint Sensor		R885*
DALI (Digital Addressable Lighting Interface)		R410*
Unique ID		R150*
3D Gesture Detection / Recognition		R805*
Heart Rate		R315*

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.