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Adafruit MCP3421 18-Bit ADC - STEMMA QT / Qwiic

Marsoni M251S
Sale price$10.00
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Adafruit MCP3421 18-Bit ADC - STEMMA QT / QwiicThe Adafruit MCP3421 18 Bit ADC is a simple, inexpensive, and easy to use 18 bit, 240 SPS, single channel ADC with an I2C interface capable of up to 3. 4MHz clock rate. It features differential inputs, adjustable gain, and a built in precision low drift reference voltage, making it ideal for reading sensors like strain gauges, pressure sensors, or thermocouples. The ADC supports multiple bit resolutions: 12 bit at 240 SPS for faster sampling, and 18
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4.6 ★★★★★
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Pops!
Dallas, US
★★★★★ 5
Quality product and functional
Style: Magnetic Charger Mount
Top shelf construction in materials and function. Easy to install and very strong magnets.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 1, 2026
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Edward Panaitescu
Belleville, US
★★★★★ 5
Recommend!!
Style: Magnetic Mount
I absolutely love this magnetic phone holder for my truck vents! The magnet is super strong, so my phone stays securely in place even on bumpy roads. Installation was a breeze—just a simple screw-in, and it fit perfectly in my truck’s vent. Highly recommend it to anyone looking for a reliable, easy-to-install car mount!
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Reviewed in the United States on April 3, 2026
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FLPeter
Lexington, US
★★★★★ 5
Great phone mount.
Style: Universal Mount
I went through several orders trying to find the perfect phone holder, and this is the one. I needed something universal that would fit my Toyota and securely hold my thicker phone. This mount is perfect — sturdy, easy to use, and fits great. I’ve had it since 11/2025. I highly recommend it!
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Reviewed in the United States on February 17, 2026
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RB
Lake Worth, US
★★★★★ 5
Best vent mounting solution for tacoma
Style: Magnetic Charger Mount
This is a must have for Tacoma owners. It's a secure lock into the vent frame and does not affect your ability to open and close vent. Installation takes a minute.
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Reviewed in the United States on May 3, 2026
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Khristian Lukianov
Fort Morgan, US
★★★★★ 5
Strong Magnet
Style: Magnetic Mount
Works as designed. Nice and sturdy. Strong magnet.
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Reviewed in the United States on March 3, 2026

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