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CIRCUIT DETAILS
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Reed Switches can switch on low power devices directly, such as LEDs, buzzers. But for sensing it should be used as part of a potential-divider. In this way, the output it supplies to other circuits is always connected to +v or 0v, and never left floating (disconnected).
Supply voltage up to 18v. Current up to 50mA approx.
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Output
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Circuit Diagrams |
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When a magnetic field activates the reed switch, a change of output occurs.
There are 2 ways to connect a reed switch in a potential divider. These are shown right and work exactly opposite from one another.
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With the Reed at the top of the potential divider, when the reed switch is activated, a high pulse is created. |
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With the Reed at the bottom of the potential divider, when the reed switch is activated, a low pulse is created. |
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