The A-Star 32U4 Prime SV microSD is a versatile programmable board designed around the ATmega32U4 AVR microcontroller, adopting the widely recognized Arduino form factor. This configuration includes microSD support and preinstalled female headers, facilitating compatibility with numerous Arduino shields. The board's power management system is a standout feature, allowing efficient operation from a wide voltage range of 5 V to 36 V, regulated by an ISL85410 switching step-down converter. This ensures stable performance and the ability to power additional devices.
The microcontroller offers native full-speed USB capabilities, enabling it to function as a virtual serial/COM port interface and emulate a mouse or keyboard when connected to a computer. This enhances its versatility compared to boards relying on USB-to-serial adapters. The board provides access to all 26 GPIO lines, with seven available for PWM outputs and twelve for analog inputs, making it suitable for a variety of applications.
The A-Star 32U4 Prime SV is equipped with a preloaded Arduino-compatible bootloader, simplifying programming through the Arduino environment. It shares the same microcontroller and form factor as the Arduino Leonardo, ensuring compatibility with shields designed for similar boards. Additional features include user-controllable LEDs, pushbuttons, and a buzzer option for sound generation. The board can be powered via USB or an external source, with a power selection circuit for seamless switching between power inputs.
1x A-Star 32U4 Prime SV microSD
Programmable ATmega32U4 MCU with 32 KB flash, 2.5 KB SRAM, 1 KB EEPROM, and native full-speed USB
Preloaded with an Arduino-compatible bootloader
All 26 general-purpose I/O lines from the ATmega32U4 are accessible
Seven hardware PWM outputs
Twelve analog inputs
Convenient 0.1"-spaced power, ground, and signal connection points
Buzzer option for simple sounds and music
microSD support
Three user-controllable LEDs
Three user pushbuttons
Reset button
Can be powered from USB or an external source
SV operating range: 5 V to 36 V
Switching 5 V regulator for efficient operation
3 V rail supplied by a 300 mA linear regulator
Power switch for external power inputs
Reverse-voltage protection on external power inputs
Power selection circuit for seamless switching between power sources
Six-pin ISP header for use with an external programmer
If you are not satisfied with a product purchased from the Site, you may request a return within 30 days from the delivery date, unless the product is listed under the Return Exceptions below or is subject to specific return conditions noted on the product page.
This return policy also applies, as a minimum standard, to products sold and fulfilled by third-party vendors through the Marketplace.
Returns under this policy concern non-defective products. In the case of a confirmed manufacturing defect, remedies are handled under the Warranty terms, at the Vendor's discretion. See the Warranty section.
Return Conditions
To qualify for a refund under the 30-day return policy, all of the following conditions must be met:
A valid Return Authorization (RA) number must be obtained prior to returning the product. Returns without an RA number will be refused.
The RA number is valid for 30 days. The returned item must be received within that period.
The RA number must be included with the return.
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Refunds are processed within 7 days after receipt and inspection of the returned item.
A $100 cleaning fee may apply to domestic robots returned in used or unclean condition.
A 20% restocking fee may apply to large-quantity returns of items ordered specifically for the customer from the manufacturer or not part of RobotShop's standard inventory.
Return Exceptions
The following products are not eligible for return or refund under this policy:
Used, damaged, or modified products — Items that show signs of use, wear, or alteration, making them unsuitable for resale.
Consumables — Use and wear-and-tear components, altered or depleted through use (e.g., batteries, belts, brushes, gears, filament, tires, disposable bags, lubricants, greases, waxes, etc.). Not eligible for return once opened or used.
Perishables — Goods liable to deteriorate or expire rapidly. Not eligible for return.
Sealed goods (health or hygiene) — Items sealed for health-protection or hygiene reasons (e.g., masks, gloves, odor-absorbing products). Not eligible for return once unsealed.
Build-it-yourself products and items requiring customer assembly — Including robots & kits, robot parts, and other products requiring assembly or soldering. Not eligible for return once assembled, soldered, or installed.
Digital Goods, Software, and Apps — Final sale only, due to licensing restrictions.
Clearance Items — Products identified as clearance or final sale, including end-of-life or discontinued items.
Custom-made, personalized, or special-order items — Products manufactured, configured, adapted, or built to the customer's own specifications and requirements.
On-Demand Items — Standard catalogue products not stocked by RobotShop and ordered specifically to fulfill a customer request.
While the same return policy applies, these orders require a separate contact process for returns.
RobotShop Fulfilled Orders → submit a support ticket from your account under My Support Tickets.
Marketplace Vendor Orders → submit a ticket from your account under My Marketplace Tickets to contact the vendor directly.
Note: Marketplace vendor products are normally labelled with SKUs starting with RM, and identified on the product page with the mention "Sold and fulfilled by [Vendor Name]".
