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Microcontrollers are nothing without any input devices (like sensors) or output devices (like displays, LEDs, servos, ...).
Simple Analog Sensors
![](Pot3/thumb.jpg)
Pot3
Simple input device - 3 potentiometers
![](Accelerometer/thumb.jpg)
Accelerometer
Connecting a 2/3 axis accelerometer
![](TEMT6000/thumb.jpg)
TEMT6000
Ambient Light Sensor
![](TMP36/thumb.jpg)
TMP36
Temperature Sensor
Simple Output
![](LED/thumb.jpg)
LED
![](Relay/thumb.jpg)
Relay
I2C
![](I2C/thumb.png)
I2C
Overview
![](WiiChuck/thumb.jpg)
WiiChuck
Wii Controller Connector
![](RTC/thumb.jpg)
DS1307 & DS3231
Real Time Clock (RTC)
![](24xx256/thumb.jpg)
24xx256
I2C EEPROM 256kbit
![](HMC6352/thumb.jpg)
HMC6352
Digital Compass
![](BMP085/thumb.jpg)
BMP085
Digital Pressure Sensor
SPI
![](SPI/thumb.png)
SPI
Overview
![](/make/thumb.png)
74HC595
8-Bit Serial-In, Parallel-Out Shift Register
![](/make/thumb.png)
74HC165
8-Bit Parallel-In, Serial-Out Shift Register
![](/make/thumb.png)
TLC5925
16-Channel Constant-Current LED Driver
![](/make/thumb.png)
TLC5940
16-Channel PWM LED Driver
UART
![](UART/thumb.jpg)
UART
Overview
![](FTDI/thumb.jpg)
FTDI
USB Serial Converter
![](GPS/thumb.jpg)
GPS
LS20031 GPS-Bee
![](ELM327/thumb.jpg)
ELM327
on-board diagnostics interface
![](ID-12/thumb.jpg)
ID-12
RFID
1-Wire
![](1Wire/thumb.png)
1-Wire
Overview
![](DS18x20/thumb.jpg)
DS1820, DS18B20, DS18S20
Temperature Sensor
![](/make/thumb.png)
DS2450
Quad A/D Converter
![](/make/thumb.png)
DS2413
Dual Channel Addressable Switch
![](/make/thumb.png)
DS2408
8 Channel Addressable Switch
![](/make/thumb.png)
DS2480
Serial to 1-Wire Line Driver
MIDI
![](MIDI/thumb.gif)
MIDI
Overview
![](MeeBlip/thumb.jpg)
MeeBlip
The Hackable Digital Synth
![](MidiVox/thumb.jpg)
MCP4921
MidiVox Shield
![](VS1053/thumb.jpg)
VS1053
Musical Instrument Shield
![](ATSAM2195/thumb.jpg)
ATSAM2195
Fluxamasynth Shield
![](YM2149/thumb.jpg)
YM2149
YM_MINI Synthesizer
![](Piezo/thumb.jpg)
Piezo
YM_MINI Synthesizer
LCD
![](HD44780/thumb.jpg)
HD44780 LCD
16/20 × 1/2/4
![](KS0107/thumb.jpg)
KS0107 LCD
128 × 64
![](PCD8544/thumb.jpg)
PCD8544 (Nokia 3310 & 5110 LCD)
84 × 48
Zigbee / 802.15.4
![](XBee/thumb.jpg)
Zigbee / 802.15.4
XBee
![](Fio/thumb.jpg)
Funnel
Arduino Fio
![](ConnectPortX2/thumb.jpg)
ConnectPort X2
XBee / Ethernet Gateway, XIG
Wireless Local Area Network / 802.11
![](WiFly/thumb.jpg)
Roving Networks' WiFly GSX 802.11b/g
WiFly Shield
Servos & Motors
![](Servos/thumb.jpg)
Servo Moters
Other Protocols
![](Ping/thumb.jpg)
Ping
Ultrasonic Distance Sensor
![](TouchScreen/thumb.jpg)
Touch Screen
4-Wire Resistive Touch Technology
![](PulseSensor/thumb.jpg)
Pulse Sensor
Optical Heart Rate Pulse Sensor
![](SHT1x/thumb.jpg)
SHT1x
Humidity and Temperature Sensor
AVR
![](Avr/thumb.png)
AVR
ATtiny & ATmega
![](AvrProgrammer/thumb.jpg)
AVR Programmer
ATtiny2313 & ATtinyX5
![](ATmegaX8/thumb.jpg)
ATmegaX8 (Arduino)
ATmega88 ATmega168 ATmega328
![](ATmegaX4/thumb.jpg)
ATmegaX4
ATmega164 ATmega324 ATmega644
![](ATtinyX5/thumb.jpg)
ATtinyX5
ATtiny25 ATtiny45 ATtiny85 (ATtiny13)
![](ATtiny2313/thumb.jpg)
ATtiny2313
Arduino Shields (Daughterboards)
![](SpeakJet/thumb.jpg)
SpeakJet / TTS256
Voice and Sound Synthesizer
Logic Analyzer
![](PoorMansLogicAnalyzer/thumb.jpg)
Poor Man's Logic Analyzer
![](OpenWorkbenchLogicSniffer/thumb.jpg)
Open Workbench Logic Sniffer
![](SaleaeLogicAnalyzer/thumb.jpg)
Saleae Logic Analyzer
Oscilloscope
![](PoorMansOscilloscope/thumb.jpg)
Poor Man's Oscilloscope
Other
![](BusPirate/thumb.jpg)
Bus Pirate
![](USBInfraredToy/thumb.jpg)
USB Infrared Toy
![](DataLoggers/thumb.jpg)
Data Logger
AVR Stick, uLog
![](Connectors/thumb.jpg)
What connectors to use?
![](ResistorValues/thumb.jpg)
Resistor Values
![](/make/thumb.png)
Batteries
![](/make/thumb.png)
Radio Control (R/C or RC)