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  #1  
Old 01-26-2022, 08:08 PM
Av8rRob's Avatar
Av8rRob Av8rRob is offline
 
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Default “Smart board” for rv smoke system

Hey guys, I am researching installing a smoke system in my plane. I have a panel switch to arm the smoke but was planning on using a small stick switch to activate the smoke. Problem is the stick switch is just a microswitch so I need it to run a relay for the 5 amp pump. Ive heard that some people make smart boards that can activate the relay in a smart fashion and am interested in that. Any help would be appreciated….

P.s. I dont know jack sh%t about programming
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  #2  
Old 01-26-2022, 08:18 PM
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AX-O AX-O is offline
 
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What is wrong with using a relay? Try these https://www.aircraftextras.com/RelayBoard20A.htm
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The information that I post is just that; information and my own personal experiences. You need to weigh out the pros and cons and make up your own mind/decisions. The pictures posted may not show the final stage or configuration. Build at your own risk. Further more, these are my opinions and not those of Van's Aircraft.
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  #3  
Old 01-26-2022, 08:28 PM
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Quote:
Originally Posted by AX-O View Post
What is wrong with using a relay? Try these https://www.aircraftextras.com/RelayBoard20A.htm

I might end up doing just that, the only problem is I would have to hold down the button continuously to smoke rather than push on- then push off. Mike Bullock’s rv-7 page has a nice solution and I have reached out to him for more info
http://www.rvplane.com/?categoryid=10000&dayid=1459
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  #4  
Old 01-26-2022, 08:46 PM
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This is can be on/off or mom on. Same item can be used to turn a fuel pump on/off or drop the flaps. Read the diagram.
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The information that I post is just that; information and my own personal experiences. You need to weigh out the pros and cons and make up your own mind/decisions. The pictures posted may not show the final stage or configuration. Build at your own risk. Further more, these are my opinions and not those of Van's Aircraft.
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  #5  
Old 01-26-2022, 09:21 PM
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I bought my original relay from O'Reilly's Auto/Aviation Supply. Cost about 0.01 AMU (or $10ish), give or take. I think it was this one:

https://www.oreillyauto.com/detail/c...?q=relay&pos=1

It's up to you if you want your system to be ON while you're holding the switch. I don't like that, so I want it to turn the system ON with a single push of my stick button, then OFF with the second push. I strongly recommend you also run that power output to a light annunciator on your panel to let you know you have commanded ON and OFF.

I have replaced that one with a prototype relay from the former owner of Smoke System Helper. Looks like the new owner's not listing that item for sale, although it sure works fine for me. Having said that, the one from O'Reilly's worked fine too.
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  #6  
Old 01-27-2022, 07:33 AM
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My stick switch is a momentary push so having a regular relay would mean I have to hold down the button. Looking for a more elegant solution if possible. I spoke to the new owner of smoke system helper and he no longer sells there smart boards.
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  #7  
Old 01-27-2022, 10:01 AM
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I used a regular automotive relay (like Sid) on the smoke pump with my system with this Pushbutton Switch on my stick.

https://www.digikey.com/en/products/...401ZQE/1280084

*click* on... *click* off... No smartboards or programming required. Works well, last long time...

This is the associated dust cover boot.

https://www.digikey.com/en/products/.../A4202/1799205

Hope this helps.
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Last edited by Jvon811 : 01-27-2022 at 10:05 AM.
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  #8  
Old 01-27-2022, 03:06 PM
ty1295 ty1295 is offline
 
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Just personal prefence but I like a switch that is on/off and can be known in that condition without looking. This becomes important in formation, when your eyes shouldn't be inside and you forgot did you hit the button once, twice, 3 times, did the bump hit it, etc.

I have a very simple toggle switch next to the throttle, index finger easily moves it up for smoke, down for off no need to look, simple, lightweight, etc.

Again my personal preference flying with smoke and in formation often.
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  #9  
Old 01-27-2022, 03:41 PM
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n82rb n82rb is offline
 
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if you want to use a momentary contact switch, what your looking for is a flip flop relay.

maybe something like this,
https://www.amazon.com/ELECTRONICS-S...17587193&psc=1

bob burns
RV-4 N82RB
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  #10  
Old 01-27-2022, 06:20 PM
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Thanks guys I appreciate the ideas.
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