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Latching Relay Setup, Diode vs Resistor

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Member - Posts: 24
Member spacespace
Joined: January 20, 2020
Location: Missouri, United States
Posted: December 27, 2020 at 4:58 PM / IP Logged Link to Post Post Reply Quote kramttocs
I am looking to implement this:
The relay on the left has a diode. Does it need to be a diode? I have some 4pins iso 280 relays that have resistors but unsure if there is a specific need in this use case for a diode.
Thank you

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