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Offline guitartoys  
#1 Posted : 02 November 2017 00:23:24(UTC)
guitartoys

United States   
Joined: 05/09/2017(UTC)
Posts: 27
Location: Virginia, McLean
Hello again,

I've been reading a bit about noise control on layouts, and wanted to hear some feedback

In reading CTI's app notes:

First, on motors I hear that using a .01uf or .1uf cap is good for noise suppression. I was wondering if any of you all have been doing so.

Also, to put snubber diodes on solenoids also for noise control. So something like a 1N4002 to clamp the spike when disconnecting the voltage to the solenoid.

Just wanted your input, as I start down this path to put the diodes and caps in place as I go.

Also, instead of using the straight flat 3 conductor Marklin wire for the turnouts, to use individual wires, and twist them. Just wanted some insight into that as well.

Thanks.

Michael
Offline Minok  
#2 Posted : 02 November 2017 19:45:05(UTC)
Minok

United States   
Joined: 15/10/2006(UTC)
Posts: 2,319
Location: Washington, Pacific Northwest
Originally Posted by: guitartoys Go to Quoted Post

Also, to put snubber diodes on solenoids also for noise control. So something like a 1N4002 to clamp the spike when disconnecting the voltage to the solenoid.


The diodes across the coil inputs of a solenoid/relay is not so much noise suppression as to protect other sensitive equipment, because not having it will introduce a large voltage spike when the coil switches off due to the stored electro-magnetic flux in the coil. That high voltage over even a short time can damage some types of electronics such as semiconductor decoders so its a protective measure.
Toys of tin and wood rule!
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