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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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4.9 ★★★★★
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Magen N
Alexandria, US
★★★★★ 5
Great for RV and boat
This stuff is amazing! My husband uses this on the boat and RV. Our RV is orange and was heavy oxidized. This brought the color back!
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Reviewed in the United States on November 3, 2025
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Richard W. Mooney
Pawtucket, US
★★★★★ 5
Easy to use..great results!
This product actually delivers on its promises! It took of years worth of road film and grime from our motorhome..leaving a clean base for the application of Poli Glow polish... Our motorhome is now looking shiney and new again. Very easy to use..just mop it on..let set for a few minutes then pressure wash off.
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Reviewed in the United States on November 4, 2025
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Patrick J Butler
Los Angeles, US
★★★★★ 5
Great product
Amazing product
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Reviewed in the United States on June 9, 2026
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Kay Rhodus
Lowell, US
★★★★★ 1
The product downer live up to the advertised claim
Washed a side by side section of my 2022 rv with poli prep and simple green. The comparison was tragic. Simple green definitely is a superior product. Don't waste your money.
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Reviewed in the United States on August 19, 2025
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MG
Pawtucket, US
★★★★★ 5
Great cleaner for tough stains on fiberglass
This cleaner was recommended by a fellow boater. I was having difficulty cleaning some black streaks on the hull, and dark stains on the water line. After trying several excellent cleansers that have never failed me, I decided to give this one a try. It cleaned up the stains when used as directed and did not damage the finish on the gelcoat. A good cleaner to have in your arsenal!
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Reviewed in the United States on September 3, 2025

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