How reed switches work (magnetically operated switches)
Reed switch - Wikipedia
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A Complete Guide to Reed Switches
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A Complete Guide to Reed Switches
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Canfield Connector
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Reed Switch Module — SunFounder Ulimate Raphael Kit for Raspberry Pi documentation
Fule 10pcs N/O Reed switch Magnetic Switch 2*14mm Normally Open Induction Switch - Walmart.com
Amazon.com: Magnetic Switch, Standard Packaging : Tools & Home Improvement
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Amazon.com: 100pcs Reed Switch 3 pin Magnetic Switch 2.514mm Normally Open Normally Closed Conversion 2.5X14MM NO NC Conversion for Sensors : Industrial & Scientific
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Reed Switch - Insulated - COM-10601 - SparkFun Electronics
What is a Reed Relay? Pickering Electronics - The Reed Relay Specialists
