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<blockquote data-quote="rollestonpark" data-source="post: 8351367" data-attributes="member: 76444"><p>Not exactly sure what your talking here, but I'm guessing:</p><p>If your switching loads such as motors or even relays/contactors with a microcontroller, you will likely get transient spikes coming into the microcontroller during switching. (often when switching off)</p><p>This will frequently crash the microcontroller and it'll have to be power cycled.</p><p>Depending on whether your switching a DC load or AC, you'll need to add a snubber to the circuit.</p><p>See info <a href="https://www.robot-electronics.co.uk/pmr209.html" target="_blank">here</a> , there is a pdf on that page with more info.</p><p>Some relays you can buy with snubbers integrated, I highly recommend getting those as they cost only a fraction more.</p><p>For a DC load you can just use a suitability sized diode. AC loads are a little more complicated. see pdf.</p><p></p><p>If this is not what your talking about, my apologises and provide a little more info for us...</p></blockquote><p></p>
[QUOTE="rollestonpark, post: 8351367, member: 76444"] Not exactly sure what your talking here, but I'm guessing: If your switching loads such as motors or even relays/contactors with a microcontroller, you will likely get transient spikes coming into the microcontroller during switching. (often when switching off) This will frequently crash the microcontroller and it'll have to be power cycled. Depending on whether your switching a DC load or AC, you'll need to add a snubber to the circuit. See info [URL='https://www.robot-electronics.co.uk/pmr209.html']here[/URL] , there is a pdf on that page with more info. Some relays you can buy with snubbers integrated, I highly recommend getting those as they cost only a fraction more. For a DC load you can just use a suitability sized diode. AC loads are a little more complicated. see pdf. If this is not what your talking about, my apologises and provide a little more info for us... [/QUOTE]
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