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A-Star 32U4 Mini LV
The A-Star 32U4 Mini LV is a programmable module based on the ATmega32U4 from Microchip (formerly Atmel). Unlike competing products, it has an on-board switching step-up/老妇人啪啪视频 regulator that allows it to be powered efficiently from a 2.7 V to 11.8 V supply. This compact 1.9″ × 0.7″ board breaks out all 26 of the microcontroller’s I/O pins (of which 7 can be used as PWM outputs and 12 as analog inputs), and loading programs is made easier by a Micro-USB interface and a preloaded Arduino-compatible bootloader.
Alternatives available with variations in these parameter(s):
| Specs (16) | Resources (30) | On the blog | 监控拍到的啪啪视频 (23) |
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Dimensions
| Size: | 0.7″ × 1.95″ × 0.23″1 |
|---|---|
| Weight: | 3.4 g2 |
General specifications
| Processor: | ATmega32U4 @ 16 MHz |
|---|---|
| RAM size: | 2560 bytes |
| Program memory size: | 32 Kbytes3 |
| Motor channels: | 0 |
| User I/O lines: | 26 |
| Input voltage range: | 2.7 V to 11.8 V (LV) |
| Minimum operating voltage: | 2.7 V |
| Maximum operating voltage: | 11.8 V |
| Maximum output current: | 1.5 A4 |
| Logic voltage: | 5 V |
| Reverse voltage protection?: | Y5 |
| External programmer required?: | N |
Identifying markings
| PCB dev codes: | ac02b |
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| Other PCB markings: | 0J8271 |
Notes:
- 1
- Without included optional headers. This measurement includes the USB Micro-B connector, which extends 0.05″ past the edge of the PCB.
- 2
- Without included optional headers.
- 3
- Note that 4 KB of the MCU's 32 KB of flash memory is used by the pre-installed USB bootloader. All 32 KB is available when programming via the ISP header rather than the bootloader.
- 4
- Available current depends on input voltage, current consumed by the board, ambient conditions, and regulator topology. See product documentation and performance graphs for details.
- 5
- On Bat+ (LV, SV) or Bat- (ULV).
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