Answer by Andy aka for bi-directional flyback diode for relay spike protection
You don't need to use a diode; a capacitor will limit the open-circuit energy from the relay coil to a voltage usually not greater than twice 9V. Lets say your inductance is 1 henry and the coil...
View ArticleAnswer by Spehro Pefhany for bi-directional flyback diode for relay spike...
Usually the polarity will be known because something like a transistor will not work if the voltage is reversed. If you have a bidirectional switch such as a mechanical contact or series back-to-back...
View ArticleAnswer by Daniel for bi-directional flyback diode for relay spike protection
You are looking for a "bidirectional TVS diode" which is two Zeners back-to-back. You can get them in many different voltages, so you can pick one that is above your supply. That way only the inductor...
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bi-directional flyback diode for relay spike protection
A flyback diode is used to protect circuits against the reverse voltage generated by removing power from a relay coil. Like this: simulate this circuit – Schematic created using CircuitLab But what to...
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