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USB Host Shield for Arduino, built on the MAX3421E. Lets your Arduino act as a USB host and talk to devices like keyboards, mice, game controllers, barcode scanners, and flash drives.

Supports USB 2.0 full/low-speed, talks to the Arduino over SPI. Stacks on Uno-form-factor boards and also works with Mega, Due, and compatible clones. Free USB Host Shield library handles HID and mass storage.

Specs

Controller MAX3421E
USB 2.0 full/low-speed host
Interface SPI
Form factor Uno shield (also Mega, Due, clones)
Devices HID, mass storage, and more

FAQ

Will this ship from Manila?

Yes — all stock ships from our Quezon City warehouse. Order before 4 PM weekdays for same-day cutoff via J&T or LBC.

Do you ship nationwide?

Yes. Metro Manila usually arrives next-day; provincial 1–3 working days.

Can I get this on a school PO or class order?

Yes — we accept Purchase Orders from accredited schools and universities. Contact us with your PO details and we'll process it.

Is this compatible with Arduino, ESP32, or Raspberry Pi?

Most parts work with common maker boards — check the description for specific pinout / voltage notes. If you're unsure, send us a message before ordering.

What's your return policy?

7-day inspection window for DOA units. Email proof of issue and we'll ship a replacement or refund. Used / installed parts are not returnable unless faulty.

Do you offer technical support?

Yes — questions land on our forum or via email, weekday or weekend. We've actually wired up most of what we sell.

Build with this board

// from learn.circuit.rocks

Notes from the bench

// from blog.circuit.rocks

Ask the community

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