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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This thing is great at opening bottles, and it has a Klein handle. Perfect for the electrician in your life, even if that's yourself. I had to knock off a star because the handle is not quite as good as other Klein tools. The plastic is not as clear. The TIP-IDENT bottlecap marking is off-center and not fully printed. The bottle opener sticks out at a slight angle. This does not affect the performance, but it does detract from the novelty somewhat.

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Reviewed in the United States on March 10, 2023

Verified Purchase

Amanda L. Day

San Leandro, US

★★★★★ 5

expands work space effectively

Initially it was a bit challenging to set up as I was not fortunate enough to have assistance (the instructions tell you that you need two people for part of the installation process). I also had to play around with placement a bit as my available installation space was extremely limited and neither of the listed/'suggested mounting situations worked for me; however, with some head-scratching and debating with myself, I finally figured how to make it work how and where I needed it it, and all was good!! It functions well, and holds adequate weight, and looks really good with the light lacquer finish...the only thing I will say to a potential buyer is to make sure you have room to walk past it easily when its closed down because it still sticks out a few inches even when closed down...overall, very happy with this item and would purchase again.

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Reviewed in the United States on February 13, 2014

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mike litchfield

Boise, US

★★★★★ 5

Works great

Is there a little expensive but they work great to add counter space. My wife liked it so much I bought a second one.

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Reviewed in the United States on June 11, 2026

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Placeholder

Louisville, US

★★★★★ 4

Looks great.

Nice quality with sturdy hardware. Size could be a little larger.

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Reviewed in the United States on August 30, 2025

Verified Purchase

Stephanie Adams

Birmingham, US

★★★★★ 5

Great addition to my sewing table!

I ordered two of these to give me a little more room on my sewing table. One for the backside and one for the left side. Worked out great! Very sturdy and not hard to install (followed directions). I just extended when I need room and fold when not in use. I would recommend these to anyone who just needs a little more table/room.

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Reviewed in the United States on May 12, 2020