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What is the purpose of this resistor?


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davep. 
Silver - Posts: 527
Silver spacespace
Joined: May 27, 2011
Location: California, United States
Posted: March 20, 2017 at 5:47 PM / IP Logged Link to Post Post Reply Quote davep.
I have used this circuit on several occasions. It works. I always configure it with the capacitor and resistor values shown. I believe the resistor is to discharge the capacitor. But I have a question: The relay coils I use are 85 Ohms. Both the coil and the resistor are in parallel. Do I really need the 10K resistor as well? It seems to me that with the 82 Ohm resistance, the circuit won't even know the 10K is there too.
Thanks in advance. Both for the explanation, AND the diagrams. I've used a bunch of them as food for thought over the years and come up with some cool installs.
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