ArduinoBoardDetails

ARDUINO MICROCOMPUTER BOARD and CHIP DETAILS (Schematics and Mechanical drawings below ):

ARDUINO (UNO, Duemilanove, YourDuinoRobo1) QUICK REFERENCE: Functions of the different pins, etc.
ARDUINO (MEGA) QUICK REFERENCE: Functions of the different pins, Schematic Diagram etc.
ARDUINO PIN CURRENT LIMITATIONS: Be Nice to your Arduino!
ARDUINO INPUT PIN CHARACTERISTICS: What voltage is a "1"? a "0"?
COMPARISION of the ARDUINO UNO and YourDuinoRoboRED

Details of the actual ATmega Microcontroller CHIP used in Arduino

COMPARISION OF MANY ARDUINO TYPE BOARDS

 **('It's Complicated!') See section below on Power Considerations

BOARD NAME	CHIP TYPE	SRAM	FLASH	EEPROM	SPEED	PWM	Digital	Analog In	Operating VCC	Vin Range**	5V	5V current mA**	3.3V	3.3V Current mA**	USB-CHIP	I2C	CAN	Bluetooth	Ethernet	USB-Host	SD Card
Duemilanove 328 (Older)	ATmega328	2K	32k	1k	16MHz	6	14	6	5V	7-12V	Yes		Yes	50	FTDI FT232RL	1	No	No	No	No	No
Arduino Uno (R3)	ATmega328	2k	32k	1k	16MHz	6	14	6	5V	7-12V	Yes		Yes	50	ATmega16U2	1	No	No	No	No	No
RoboRED (Yourduino)	ATmega328	2k	32k	1k	16MHz	6	14	6	5V/3.3V	7-23V	Yes	2000	Yes	500	ATmega16U2	1	No	No	No	No	No
Sparkfun RedBoard	ATmega328	2k	32k	1k	16MHz	6	14	6	5V	7-23V	Yes		Yes	50	FTDI FT232RL	1	No	No	No	No	No
Arduino Nano 3.0	ATmega328	2k	32k	1k	16MHz	6	14	8	5	7-12V	Yes		Yes	50	FTDI FT232RL	1	No	No	No	No	No
Arduino Mega 2560	ATmega2560	8k	256k	4k	16MHz	14	54	16	5V	7-18V	Yes		Yes	50	ATmega16U2	1	No	No	No	No	No
Leonardo	ATmega32U4	2.5k	32k	1k	16MHz	7	25	12	5V	3.3V-5V	VCC		VCC	50	Built-In	1	No	No	No	No	No
Arduino Micro	ATmega32u4	2.5k	32k	1k	16MHz	7	25	12	5V	3.3V-5V	VCC		VCC	?	Built-In	1	No	No	No	No	No
Arduino Due	SAM3X8E	96kb	512kb	N/A	84MHz	12	70	12	3.3V	7-12V	No		VCC	?	Built-In	2	Yes	No	No	Yes	No
Arduino Ethernet	ATmega328	2k	32k	1k	16MHz	4	9	6	5	6-18V	Yes		Yes	?	EXTERNAL	1	No	No	W5100	No	No

Arduino Pro Mini 328 5V	ATmega328	2k	32k	1k	16MHz	6	14	6	5V	5-12V	Yes	?	No		EXTERNAL	1	No	No	No	No	No
Arduino Mini	ATmega328	2k	32k	1k	16MHz	6	14	8	5	7V-9V	Yes		No	?	EXTERNAL	1	No	No	No	No	No
Arduino Pro 3.3V	ATmega328	2k	32k	1k	8MHz	6	14	6	3.3V	3.35-12V	No	?	Yes		EXTERNAL	1	No	No	No	No	No
Arduino Pro 5V	ATmega328	2k	32k	1k	16MHz	6	14	6	5V	5-12V	Yes		No		EXTERNAL	1	No	No	No	No	No
LilyPad 328 Main Board	ATmega328	2k	32k	1k	8MHz	6	14	6	2.7-5.5V		N/A		N/A		EXTERNAL	1	No	No	No	No	No
Seeeduino	ATmega328	2k	32k	1k	16MHz	6	14	6	5V	3.3V-12V	VCC		Yes		FTDI FT232RL	1	No	No	No	No	No
Seeeduino Ethernet	ATmega328	2k	32k	1k	16MHz	6	14	6	5V	3.3V-12V	VCC		Yes		EXTERNAL	1	No	No	W5100	No	Yes
Seeeduino Stalker V2.0	ATmega328	2k	32k	1k	16MHz	6	14	6	5V	3.3V-5V	VCC		?		EXTERNAL	1	No	No	No	No	microSD
Teensyduino	ATmega32U4	2.5k	32k	1k	16MHz	7	25	12	5V	3.3V-5V	VCC		VCC		Built-In	1	No	No	No	No	No

Power Considerations:

VIN. The input voltage to the Arduino board when it's using an external power source (as opposed to 5 volts from the USB connection or other regulated power source). This is connected to the center terminal of the Coaxial "Power" connector through a "M7" 1A silicon diode (protection against reverse applied voltage). You can supply a voltage through this pin, or, if supplying voltage via the power connector, access it through this pin. The current that can be drawn from the Vin pin is limited by the diode and trace width. The diode is rated at 1 amp and the board traces can't handle much above 2 amp. Because of the diode, the voltage at Vin will be .7 to .9 volts less than the voltage supplied on the external power connector.
5V.The regulated power supply used to power the microcontroller and other components on the board. This can come either from VIN/Power Connctor via an on-board regulator, or be supplied by USB or another regulated 5V supply.
- LIMITATIONS: If an external power supply is connected to VIN, the current available from 5V depends on the power dissipated in the onboard regulator, which is a maximum of about 1.5W. (Ref )At 7V VIN this is about 700mA, at 9V VIN it's about 350 mA , at 12V it's about 200 mA. Calculate: I=P/E so available current at 5V = 1.5 / (VIN - 5)
- PRACTICAL LIMITS: The ATMEGA328 and other chips use about 120mA, so what's LEFT for your LED's , and other external devices is the limitations above minus about 150 mA, so now at VIN of: 7V it's about 550mA, 9V about 200 mA, and 12V 50 mA.
- NOTE: The YourDuino RoboRED has a totally different 5 V regulator, a switch-mode system that provides up to 2 amps (2000 mA).
3V3.A 3.3 volt supply generated by the on-board regulator or FTDI chip. Maximum current draw is 50 mA.
- NOTE: The YourDuinoRobo1 and YourDuino RoboRED have a separate 3.3V power regulator that provides up to 350mA at 3.3V
GND. Ground pins.