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Reed switches have been manufactured since the 1930s. Compared with armature-based relays, reed relays can switch much faster, as the moving parts are small and lightweight, although switch bounce is still present. [1] Also, they require less operating power and have lower contact capacitance.
In electrical engineering, a limit switch is a switch operated by the motion of a machine part or the presence of an object. A limit switch can be used for controlling machinery as part of a control system , as a safety interlock , or as a counter enumerating objects passing a point.
For high-speed use, the mercury-wetted relay is used instead. This combines the speed of a low-mass relay, together with the fast wetting of mercury contacts. A relay, usually a reed relay, has its contacts coated with a small quantity of mercury. This gives the low bounce advantage of mercury, although the current capacity is still limited to ...
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A reed switch has very low resistance when closed, typically as low as 0.05 ohms, whereas the Hall effect sensors can be in the hundreds of ohms. A reed switch requires only two wires whereas most solid-state devices require three wires. A reed switch can be said to require zero power to operate it.
Jan. 22—CHIPPEWA FALLS — Chippewa County Judge James Isaacson ruled Monday a defense attorney is allowed to call deputies to testify and ask them if Sheriff Travis Hakes told them to turn off ...
Body-worn camera video released Friday starts with Vu sitting in the driver's seat of his parked car with the door open as Gibson stands in front of him in a sunny parking lot. The officer said Vu ...
The 6-foot-4 wideout averaged an NFL-high 20.4 yards a reception in 2019. Williams excels at 50-50 balls and has big-play ability but he hasn’t been the same since his season-ending knee injury ...
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