Adafruit TCA8418 Keypad Matrix and GPIO Expander Breakout - STEMMA QT / Qwiic

Adafruit TCA8418 Keypad Matrix and GPIO Expander Breakout - STEMMA QT / Qwiic

Marsoni

M251S

$10.00

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

Adafruit TCA8418 Keypad Matrix and GPIO Expander Breakout - STEMMA QT / QwiicThe Adafruit TCA8418 is a versatile and powerful I2C GPIO expander and keypad matrix driver. Featuring 18 total I O pins arranged as 10 columns and 8 rows, it supports up to 80 buttons in a matrix configuration, or can be used as individual GPIO inputs or outputs. This chip includes a 10 element event queue for key press and release events, and provides interrupt output on the INT pin. It supports features such as pull ups, debounce filtering, and

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I've had more than a few front pocket wallets, and this one is up at the top. It's sturdy even though it's thin, and the stitching is even. Card retention is great with room for 1-2 cards per pocket, as well as room for a few bills to fit comfortably in the middle pocket. Probably going to buy another as a backup.

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Reviewed in the United States on July 6, 2025

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Joe

San Leandro, US

★★★★★ 5

Perfect size, style, and material

Color: Ivy Green/Chicory Coffee

I love the Charlie wallet, it’s so sleek, fits everything you need, looks good, and made out of the best material. The amount of pockets plus the center fold makes this a really hard product to beat

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Reviewed in the United States on January 4, 2026

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joseph2701

Bozeman, US

★★★★★ 5

Perfect size

Color: Black Tonal

I’m on my third one in many years. Amazing quality with plenty of room. Easy to carry in dress Pants or jeans. Highly recommend.

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Reviewed in the United States on December 4, 2025

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Z. Harward

Carnegie, US

★★★★★ 5

Great option for a slim wallet.

Color: Black Tonal

I love this wallet. i bought my fist one and it lasted for a decade before the seems finally got some wear. It will eventually wear out some chips because of how tightly i pack it, but that is on me for trying to fit extra cards in there. Its a perfect slim wallet.

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Reviewed in the United States on March 21, 2026