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)		R69.50*
PULL (Pull-Up / Pull-Down Resistors)		R57.50*
4x4 Keypad		R175*
Optocoupler		R410*
Encoder		R235*
Power Transistors		R210*
Communication
Wired Communication
Ethernet (LAN)		R370*
RS232 (Serial Communication)		R155*
USB UART (Serial/RS232 to USB interface)		R175*
USB SPI (SPI to USB interface)		R270*
USB I2C (I2C to USB interface)		R270*
CAN (Controller Area Network)		R355*
CAN-SPI (CAN with SPI interface)		R245*
RS485		R210*
LIN (Local Interconnect Network)		R410*
4-20mA Current Loop		R500*
Fiber Optic		R650*
Wireless Communication
WiFi		R515*
ZigBee / X-Bee		R555*
Bluetooth		R680*
Bluetooth Low Eneregy		R480*
2.4GHz Radio		R190*
868MHz Radio		R1,100*
LoRa		R1,000*
Infra-Red		R110*
IrDA		R495*
Energy Harvesting		R745*
GSM / GPRS Communication
Telit GL865		R940*
Quectel M95		R845*
Quectel UG95 (3G)		R1,650*
SIM800H		R1,050*
uBlox Leon G-100		R1,650*
Storage
MMC/SD Card		R235*
RAM		R175*
Compact Flash		R410*
SerialFlash		R195*
EEPROM		R94*
Display / Touch Panel
LED		R94*
LED Matrix Display		R175*
Bar Graph (Meter) Display		R235*
7-Segment Display		R195*
TFT (Colour display with touch-panel)		R365*
EVE Graphics Controller [i]		R745*
Touch-Panel Controller		R275*
LCD/GLCD Display Adapters
On-Screen-Display		R670*
Analogue
ADC (Analogue to digital converter)		R280*
LDC (Inductance to digital converter)		R670*
Potentiometer (8 Potentiometers)		R315*
Digital Potentiometer		R120*
DAC (Digital to analogue converter)		R355*
Comparator		R235*
Environment Measurement
Temperature, Humidity & Pressure Measurement
Temperature and Humidity		R315*
Thermocouple (Temperature)		R555*
Infra-Red Thermometer		R1,100*
Pressure Sensor		R480*
GPS
GPS		R505*
GNSS		R745*
Motion & Position Measurement
Three-Axis Accelerometer		R370*
Tilt Sensor		R255*
Gyroscope		R295*
Compass		R295*
Magnetic Field Detection (Hall Sensor)		R235*
Motion Sensor		R155*
Proximity/Distance Sensor		R200*
Altitude Sensor		R170*
Light & Colour Measurement
Ambient Light Sensor		R190*
Light to Frequency Converter		R350*
UV Light Detector		R470*
Color Sensor		R295*
Line Following		R295*
Chemical Detection
Alcohol Sensor		R175*
Air Quality Sensor		R325*
CO (Carbon Monoxide) Sensor		R325*
LPG (Liquefied Petroleum Gas) Sensor		R295*
Methane Gas Sensor		R295*
Hydrogen Gas Sensor		R295*
Magnetics
Hall Effect Sensor		R235*
Lightning Proximity Detector		R670*
REED Switch		R135*
Timekeeping
Real-Time Clock (with PCF8583)		R245*
Real-Time Clock (with Dallas DS1307)		R410*
Audio
Piezo Buzzer (20Hz - 20KHz)		R105*
Audio Codec (MP3 / WMA / etc)		R430*
FM Tuner		R555*
Voice Recognition		R745*
Text To Speech		R745*
Relay & Motor
Relay		R355*
Bipolar Stepper Motor Driver		R280*
DC Motor Driver		R275*
Buggy Car		R2,100*
Haptic Feedback (Vibration)		R450*
Power
Step-down DC-DC converter		R370*
USB Li-Po Charger		R195*
Voltage Translators		R235*
Current Measurement		R280*
Connectors / Adapters
PS/2		R98*
Miscellaneous
Port Expander		R235*
RF-ID Reader (125KHz)		R470*
RF-ID Reader (13.56MHz)		R555*
NFC		R235*
RF Meter		R845*
Capacitive Touch Sensing		R140*
Joystick Input (Hall-Effect Sensor)		R430*
Joystick Input (Analogue)		R390*
PWM (Pulse-Width Modulation)		R290*
Camera		R745*
Fingerprint Sensor		R1,050*
DALI (Digital Addressable Lighting Interface)		R480*
Unique ID		R175*
3D Gesture Detection / Recognition		R940*
Heart Rate		R370*

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.