Data Sheet

A-Star
32U4
Micro
A-Star 32U4
Mini ULV
A-Star 32U4
Mini LV
A-Star 32U4
Mini SV
A-Star 32U4
Prime LV
A-Star 32U4
Prime SV
Microcontroller: ATmega32U4 ATmega32U4 ATmega32U4
User I/O lines: 18 26 26
PWM outputs: 7 7 7
Analog inputs: 8 12 12
Ground access
points:
2 4 43
User LEDs: 2 3 3
User
pushbuttons:
— — 3
Reset button:
Power switch:
Buzzer option:
microSD
option:
LCD option:
Operating
voltage:
5.5 V to 15 V 0.5 V to 5.5 V
2.7 V to
11.8 V
5 V to 36 V 2.7 V to 11.8 V 5 V to 36 V
Regulator type: linear
switching
step-up
switching
step-up/step-
down
switching
step-down
switching
step-up/step-
down
switching
step-down
Regulated
current:
100 mA
(1)
500 mA
(1)
1 A
(1)
500 mA
(1)
1 A
(1)
1 A
(1)
Dimensions: 1″ × 0.6″ 1.9″ × 0.7″ 2.8″ × 2.1″
Weight: 1.3 g
(2)
3.4 g
(2)
13 g to 33 g
1 These values are rough approximations for comparison purposes. Available current depends on input voltage,
current consumed by the board, ambient conditions, and regulator topology. See product documentation and
performance graphs for details.
2 Without included optional headers.
1.1. Supported operating systems
The A-Star 32U4 boards can be programmed using any operating system that supports the Arduino environment. We
have tested the A-Stars, our Arduino software add-on, and the Arduino IDE on Microsoft Windows 8.1, 8, 7, Vista,
XP (with Service Pack 3), Linux, and Mac OS X.
Pololu A-Star 32U4 User’s Guide © 2001–2014 Pololu Corporation
1. Overview Page 4 of 47