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)		R140*
PULL (Pull-Up / Pull-Down Resistors)		R69*
4x4 Keypad		R215*
Optocoupler		R490*
Encoder		R280*
Power Transistors		R255*
Communication
Wired Communication
Ethernet (LAN)		R265*
RS232 (Serial Communication)		R190*
USB UART (Serial/RS232 to USB interface)		R180*
USB SPI (SPI to USB interface)		R280*
USB I2C (I2C to USB interface)		R340*
CAN (Controller Area Network)		R440*
CAN-SPI (CAN with SPI interface)		R420*
RS485		R255*
LIN (Local Interconnect Network)		R420*
4-20mA Current Loop		R610*
Fiber Optic		R670*
Wireless Communication
WiFi		R530*
ZigBee / X-Bee		R745*
Bluetooth		R905*
Bluetooth Low Eneregy		R590*
2.4GHz Radio		R225*
868MHz Radio		R1,150*
LoRa		R1,050*
Infra-Red		R135*
IrDA		R510*
Energy Harvesting		R925*
GSM / GPRS Communication
Telit GL865		R1,150*
Quectel M95		R1,000*
Quectel UG95 (3G)		R1,200*
SIM800H		R1,300*
uBlox Leon G-100		R1,700*
Storage
MMC/SD Card		R380*
RAM		R210*
Compact Flash		R420*
SerialFlash		R240*
EEPROM		R160*
Display / Touch Panel
LED		R110*
LED Matrix Display		R300*
LED Ring		R590*
Bar Graph (Meter) Display		R280*
7-Segment Display		R240*
TFT (Colour display with touch-panel)		R435*
EVE Graphics Controller [i]		R925*
Touch-Panel Controller		R335*
LCD/GLCD Display Adapters
On-Screen-Display		R685*
Analogue
ADC (Analogue to digital converter)		R570*
LDC (Inductance to digital converter)		R825*
Potentiometer (8 Potentiometers)		R385*
Digital Potentiometer		R120*
DAC (Digital to analogue converter)		R440*
Comparator		R280*
Environment Measurement
Temperature, Humidity & Pressure Measurement
Temperature and Humidity		R380*
Thermocouple (Temperature)		R685*
Infra-Red Thermometer		R765*
Pressure Sensor		R590*
GPS
GPS		R605*
GNSS		R490*
Motion & Position Measurement
Three-Axis Accelerometer		R280*
Tilt Sensor		R300*
Gyroscope		R350*
Compass		R350*
Magnetic Field Detection (Hall Sensor)		R280*
Motion Sensor		R185*
Proximity/Distance Sensor		R240*
Altitude Sensor		R205*
Stretch Measurement		R1,300*
Force & Weight
Force		R745*
Light & Colour Measurement
Ambient Light Sensor		R225*
Light to Frequency Converter		R360*
UV Light Detector		R570*
Color Sensor		R360*
Line Following		R360*
Chemical Detection
Alcohol Sensor		R360*
Air Quality Sensor		R400*
Ozone Detection (O3)
CO (Carbon Monoxide) Sensor		R400*
LPG (Liquefied Petroleum Gas) Sensor		R360*
Methane Gas Sensor		R360*
Hydrogen Gas Sensor		R360*
Magnetics
Hall Effect Sensor		R280*
Lightning Proximity Detector		R825*
REED Switch		R160*
Timekeeping
Real-Time Clock (with PCF8583)		R420*
Real-Time Clock (with Dallas DS1307)		R420*
Timer		R440*
Audio
Piezo Buzzer (20Hz - 20KHz)		R72.50*
Audio Codec (MP3 / WMA / etc)		R510*
FM Tuner		R685*
Voice Recognition		R805*
Text To Speech		R1,050*
Audio Amplifier		R340*
Noise Dectection		R685*
Relay & Motor
Relay		R440*
Bipolar Stepper Motor Driver		R335*
DC Motor Driver		R195*
Buggy Car		R2,600*
Haptic Feedback (Vibration)		R550*
Power
Step-down DC-DC converter		R460*
USB Li-Po Charger		R240*
Voltage Translators		R480*
Current Measurement		R220*
Connectors / Adapters
PS/2		R100*
Miscellaneous
Port Expander		R240*
RF-ID Reader (125KHz)		R570*
RF-ID Reader (13.56MHz)		R685*
NFC		R280*
RF Meter		R1,000*
Capacitive Touch Sensing		R170*
Joystick Input (Hall-Effect Sensor)		R440*
Joystick Input (Analogue)		R590*
PWM (Pulse-Width Modulation)		R360*
Camera		R765*
Fingerprint Sensor		R1,050*
DALI (Digital Addressable Lighting Interface)		R590*
Unique ID		R220*
3D Gesture Detection / Recognition		R1,150*
Heart Rate		R460*
Cap Extend click		R440*

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.