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OT-Tredici, OT-Dodici, Arduino-UNO Comparisons

The following is a comparison of features and pricing between the controller boards shown, and which all have a similar -UNO form-factor. The OT-Hobbies boards are about 1/2" bigger to accomodate the Extension Headers and XBee modules.

OT-TREDICI - (2013)OT-DODICI - (2012) Arduino-UNO

OT-DODICI is our 2012 design, that's been in operation for over 16 months.
OT-TREDICI is new as of February 2013.

feature OT-TREDICI OT-DODICI Arduino-UNO
Kit, Assembled
- customizable
D-I-Y Kit
Y
D-I-Y Kit
Y
assembled
-
CPU
- Flash, RAM, eeprom
- PWM, A/D channels
- UARTs (hardware)
ATmega 1284P
128K, 16K, 4K
6, 8
2
ATmega328
32K, 2K, 1K
6, 6
1
ATmega328
32K, 2K, 1K
6, 6
1
Programmability
- USB / FTDI onboard
- ICSP

(ext)
Y

(ext)
Y

Y
Y
5V regulator - (rating)
- heatsink: external, pcb-area
- Vin = 12V
- Vin = 7V
1.5A (TO-220)
Y, Y
0.5A (prac)
1.5A (prac)
1A (TO-220)
Y, Y
0.5A (prac)
1A (prac)
1A (TO-223)
-, Y
< 0.1A (prac)
0.25A (prac)
3.3V regulator 1A (DPAK)
0.8A (prac)
1A (DPAK)
0.8A (prac)
0.15A (TO-23)
0.15A (prac)
see next page for info about Practical Power Dissipation in voltage regulators.
Vcc selectable 5V or 3.3V 5V or 3.3V 5V (only)
Arduino stacking headers Y Y Y
3-Row Extension Headers
- series-protection Rs
- voltage-dividers (on A/D)
- buss voltage adjustable
20-pos
20
8
5V or 3.3V
20-pos
20
6
5V or 3.3V
-
-
-
-
I2C Buss Header
- buss voltage adjustable
3-pos
5V or 3.3V
3-pos
5V or 3.3V
-
XBee socket, level-shifters Y Y -

external SRAM, EEPROM Y (SPI)
(to 128KB)
Y (both SPI, I2C)
(to 128KB)
-
Piezo beeper Y Y -
NPN inverter Y Y -
dimensions 3.6" x 3.0"
(90mm x 74mm)
3.2" x 3.0"
(80mm x 74mm)
2.8" x 2.6"
(70mm x 64mm)
nominal Pricing $32-46 $22-28 $28
- means not included.
(ext) = requires external FTDI Cable.
(prac) = practical current level, without overheating.

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© OT-Hobbies, May 2013