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)		R84.50*
PULL (Pull-Up / Pull-Down Resistors)		R70.50*
4x4 Keypad		R130*
Optocoupler		R300*
Encoder		R170*
Power Transistors		R260*
Communication
Wired Communication
Ethernet (LAN)		R275*
RS232 (Serial Communication)		R115*
USB UART (Serial/RS232 to USB interface)		R130*
USB SPI (SPI to USB interface)		R200*
USB I2C (I2C to USB interface)		R200*
CAN (Controller Area Network)		R260*
CAN-SPI (CAN with SPI interface)		R300*
RS485		R260*
LIN (Local Interconnect Network)		R300*
4-20mA Current Loop		R375*
Fiber Optic		R490*
Wireless Communication
WiFi		R360*
ZigBee / X-Bee		R415*
Bluetooth		R560*
Bluetooth Low Eneregy		R360*
2.4GHz Radio		R230*
868MHz Radio		R830*
LoRa		R760*
Infra-Red		R135*
IrDA		R370*
Energy Harvesting		R560*
GSM / GPRS Communication
Telit GL865		R705*
Quectel M95		R630*
Quectel UG95 (3G)		R1,200*
SIM800H		R800*
uBlox Leon G-100		R1,250*
Storage
MMC/SD Card		R230*
RAM		R215*
Compact Flash		R300*
SerialFlash		R145*
EEPROM		R115*
Display / Touch Panel
LED		R115*
LED Matrix Display		R215*
Bar Graph (Meter) Display		R170*
7-Segment Display		R145*
TFT (Colour display with touch-panel)		R445*
EVE Graphics Controller [i]		R560*
Touch-Panel Controller		R200*
LCD/GLCD Display Adapters
On-Screen-Display		R500*
Analogue
ADC (Analogue to digital converter)		R345*
LDC (Inductance to digital converter)		R500*
Potentiometer (8 Potentiometers)		R230*
Digital Potentiometer		R245*
DAC (Digital to analogue converter)		R260*
Comparator		R170*
Environment Measurement
Temperature, Humidity & Pressure Measurement
Temperature and Humidity		R230*
Thermocouple (Temperature)		R415*
Infra-Red Thermometer		R415*
Pressure Sensor		R360*
GPS
GPS		R630*
GNSS		R560*
Motion & Position Measurement
Three-Axis Accelerometer		R275*
Tilt Sensor		R185*
Gyroscope		R360*
Compass		R360*
Magnetic Field Detection (Hall Sensor)		R170*
Motion Sensor		R185*
Proximity/Distance Sensor		R170*
Altitude Sensor		R210*
Light & Colour Measurement
Ambient Light Sensor		R230*
Light to Frequency Converter		R255*
UV Light Detector		R345*
Color Sensor		R215*
Line Following		R215*
Chemical Detection
Alcohol Sensor		R215*
Air Quality Sensor		R235*
CO (Carbon Monoxide) Sensor		R235*
LPG (Liquefied Petroleum Gas) Sensor		R215*
Methane Gas Sensor		R215*
Hydrogen Gas Sensor		R215*
Magnetics
Hall Effect Sensor		R170*
Lightning Proximity Detector		R500*
REED Switch		R100*
Timekeeping
Real-Time Clock (with PCF8583)		R300*
Real-Time Clock (with Dallas DS1307)		R300*
Audio
Piezo Buzzer (20Hz - 20KHz)		R130*
Audio Codec (MP3 / WMA / etc)		R315*
FM Tuner		R415*
Voice Recognition		R560*
Text To Speech		R560*
Relay & Motor
Relay		R260*
Bipolar Stepper Motor Driver		R260*
DC Motor Driver		R200*
Buggy Car		R1,650*
Haptic Feedback (Vibration)		R330*
Power
Step-down DC-DC converter		R275*
USB Li-Po Charger		R140*
Voltage Translators		R285*
Current Measurement		R345*
Connectors / Adapters
PS/2		R72*
Miscellaneous
Port Expander		R170*
RF-ID Reader (125KHz)		R345*
RF-ID Reader (13.56MHz)		R415*
NFC		R170*
RF Meter		R630*
Capacitive Touch Sensing		R170*
Joystick Input (Hall-Effect Sensor)		R315*
Joystick Input (Analogue)		R285*
PWM (Pulse-Width Modulation)		R215*
Camera		R560*
Fingerprint Sensor		R770*
DALI (Digital Addressable Lighting Interface)		R360*
Unique ID		R130*
3D Gesture Detection / Recognition		R705*
Heart Rate		R275*

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.