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)		R92*
PULL (Pull-Up / Pull-Down Resistors)		R76.50*
4x4 Keypad		R140*
Optocoupler		R325*
Encoder		R185*
Power Transistors		R280*
Communication
Wired Communication
Ethernet (LAN)		R295*
RS232 (Serial Communication)		R125*
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)		R280*
CAN-SPI (CAN with SPI interface)		R325*
RS485		R280*
LIN (Local Interconnect Network)		R325*
4-20mA Current Loop		R405*
Fiber Optic		R530*
Wireless Communication
WiFi		R310*
ZigBee / X-Bee		R450*
Bluetooth		R610*
Bluetooth Low Eneregy		R390*
2.4GHz Radio		R250*
868MHz Radio		R900*
LoRa		R825*
Infra-Red		R150*
IrDA		R405*
Energy Harvesting		R610*
GSM / GPRS Communication
Telit GL865		R765*
Quectel M95		R685*
Quectel UG95 (3G)		R1,300*
SIM800H		R870*
uBlox Leon G-100		R1,350*
Storage
MMC/SD Card		R250*
RAM		R235*
Compact Flash		R325*
SerialFlash		R155*
EEPROM		R125*
Display / Touch Panel
LED		R125*
LED Matrix Display		R235*
Bar Graph (Meter) Display		R185*
7-Segment Display		R155*
TFT (Colour display with touch-panel)		R485*
EVE Graphics Controller [i]		R610*
Touch-Panel Controller		R220*
LCD/GLCD Display Adapters
On-Screen-Display		R545*
Analogue
ADC (Analogue to digital converter)		R375*
LDC (Inductance to digital converter)		R545*
Potentiometer (8 Potentiometers)		R250*
Digital Potentiometer		R93.50*
DAC (Digital to analogue converter)		R280*
Comparator		R185*
Environment Measurement
Temperature, Humidity & Pressure Measurement
Temperature and Humidity		R250*
Thermocouple (Temperature)		R450*
Infra-Red Thermometer		R450*
Pressure Sensor		R390*
GPS
GPS		R685*
GNSS		R610*
Motion & Position Measurement
Three-Axis Accelerometer		R295*
Tilt Sensor		R200*
Gyroscope		R390*
Compass		R390*
Magnetic Field Detection (Hall Sensor)		R185*
Motion Sensor		R205*
Proximity/Distance Sensor		R185*
Altitude Sensor		R225*
Light & Colour Measurement
Ambient Light Sensor		R250*
Light to Frequency Converter		R280*
UV Light Detector		R375*
Color Sensor		R235*
Line Following		R235*
Chemical Detection
Alcohol Sensor		R235*
Air Quality Sensor		R255*
CO (Carbon Monoxide) Sensor		R255*
LPG (Liquefied Petroleum Gas) Sensor		R235*
Methane Gas Sensor		R235*
Hydrogen Gas Sensor		R235*
Magnetics
Hall Effect Sensor		R185*
Lightning Proximity Detector		R545*
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)		R340*
FM Tuner		R450*
Voice Recognition		R610*
Text To Speech		R610*
Relay & Motor
Relay		R280*
Bipolar Stepper Motor Driver		R280*
DC Motor Driver		R220*
Buggy Car		R1,750*
Haptic Feedback (Vibration)		R360*
Power
Step-down DC-DC converter		R295*
USB Li-Po Charger		R155*
Voltage Translators		R310*
Current Measurement		R375*
Connectors / Adapters
PS/2		R78*
Miscellaneous
Port Expander		R185*
RF-ID Reader (125KHz)		R375*
RF-ID Reader (13.56MHz)		R450*
NFC		R185*
RF Meter		R685*
Capacitive Touch Sensing		R185*
Joystick Input (Hall-Effect Sensor)		R345*
Joystick Input (Analogue)		R310*
PWM (Pulse-Width Modulation)		R230*
Camera		R610*
Fingerprint Sensor		R840*
DALI (Digital Addressable Lighting Interface)		R390*
Unique ID		R140*
3D Gesture Detection / Recognition		R765*
Heart Rate		R295*

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.