Adafruit ISO1540 Bidirectional I2C Isolator - STEMMA QT / Qwiic

Adafruit ISO1540 Bidirectional I2C Isolator - STEMMA QT / Qwiic

Marsoni

M251S

$10.74

Get it in 3 business days with 1 day shipping. Friday, May 29

Adafruit ISO1540 Bidirectional I2C Isolator - STEMMA QT / QwiicThe Adafruit ISO1540 Bidirectional I2C Isolator is designed to provide full electrical isolation between two sides of an I2C bus. Perfect for setups where you need to keep an I2C bus controller and an I2C device electrically separated due to grounding differences, noise reduction, or special power monitoring requirements. This board uses the TI ISO1540 chip, which supports bidirectional I2C communication up to 1 MHz with clock stretching and operates

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The sweatband on the inside of the visor only goes up half way and is not sewn in on the top to secure it in place so it exposes the interfacing which is thin. On the other visors the sweatband goes all the way up and is sewn in. The sweatband material in the other visors is much cushier than this one. Lastly, the sweatband material makes my forehead itch. Other than the construction and materials used in the sweatband, the visor is well made and the color is as pictured.

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Reviewed in the United States on March 1, 2026

Verified Purchase

Rox

Battle Creek, US

★★★★★ 5

A good buy

Size: One Size, Color: Power Pink

First, love the color. It's very comfortable. I was concerned cuz I have a small head but very adjustable and it fits. It's breathable my head didn't get so hot like it normally does. I think I'll be ordering another in another color

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Reviewed in the United States on October 17, 2025

Verified Purchase

Mia

Massapequa, US

★★★★★ 5

Perfect Visor

Size: One Size, Color: (001) Black / Black / Reflective

I bought this thinking I wouldn’t like it. I was so wrong. This is lightweight and the perfect fit. What a great value. It’s so comfortable on your head and the vent on it was a great idea. Adjusts easily and just a great buy.

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Reviewed in the United States on July 27, 2024

Verified Purchase

Chief TB

Bozeman, US

★★★★★ 5

A great sport visor

Size: One Size, Color: (100) White / White / Reflective

My head is small so a lot of visors don’t fit because of the Velcro. This is perfect and the ability to wet it for coolness is great. Love it for tennis.

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Reviewed in the United States on August 14, 2025

Verified Purchase

M. O'Mara

Carnegie, US

★★★★★ 5

Great for running

Size: One Size, Color: (001) Black / Black / Reflective

Hat fits well and worked great for my marathon. The Velcro doesn’t pull on my hair.

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Reviewed in the United States on November 24, 2025