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Which Oil Pressure Switch?
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user9253

Joined: 28 Mar 2008
Posts: 1930
Location: Riley TWP Michigan

Posted: Tue Mar 26, 2024 11:03 am Post subject: Re: Which Oil Pressure Switch?

I used the XH-M609 for a low voltage shutoff and posted about it here with directions:

http://forums.matronics.com/viewtopic.php?t=16776629&postdays=0&postorder=asc&start=20

I believe that the XH-M609 can also detect high voltage, but am not sure.

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Joe Gores

Mudfly

Joined: 04 Feb 2012
Posts: 39

Posted: Tue Mar 26, 2024 11:28 am Post subject: Re: Voltage Controlled Switch

[quote="user9253"]eBay item number:364742288098 might be the device that you are looking for.

Or maybe this one from Amazon:

https://www.amazon.com/XH-M609-Digital-Disconnect-Discharge-Protection/dp/B07WRZSJ5M

Instructions written in Chinlish:

https://www.robotics.org.za/XH-M609[/quote]



Interesting Joe.

Looks like the XH-M609 may work.   Should I mount it beside my fire extinguisher?  Joking..but seriously, for a unit like that would it be 

unlikely to cause a major issue if it went into meltdown mode?

Thanks, Shawn

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Mudfly

Joined: 04 Feb 2012
Posts: 39

Posted: Tue Mar 26, 2024 12:57 pm Post subject: Re: Which Oil Pressure Switch?

Thanks again gentlemen for the suggestions.   As It turns out , after

consulting the folks at Garmin,  it looks like I should be able to get 12v

to my Hobbs meter from the GEA24.   Pin 9 on connector J243 is labeled 

"RPM XDCR+12v -OUT".   

Shawn



**"UPDATE"  After further consultation with Garmin, the above information 

is not correct.  Pin 9 on the GEA 24 will output 12v as soon as the 

unit is powered.   Not once the the engine is running and RPM is 

active as stated above.**

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nuckolls.bob(at)aeroelect
Guest

Posted: Fri Mar 29, 2024 8:16 pm Post subject: Which Oil Pressure Switch?

At 10:32 AM 3/26/2024, you wrote:

  	  Quote: 	
		  I have a battery charger that senses vibration caused when the engine is started, and uses that as a trigger. I wouldn't have any idea how to procure or implement a vibration sensor as a trigger for your Hobbs, but I'll bet some of the guys on this list do. 	


   What's the alternator in your system?

   PM dynamo perhaps?



 

 

   Bob . . .



                    //// 

                   (o o) 

    ===========o00o=(_)=o00o========= 

    < Go ahead, make my day . . .   > 

    < show me where I'm wrong.      > 

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    In the interest of creative evolution

    for the-best-we-know-how-to-do based

    on physics and repeatable experiment.

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user9253

Joined: 28 Mar 2008
Posts: 1930
Location: Riley TWP Michigan

Posted: Sun Apr 07, 2024 7:27 am Post subject: Re: Which Oil Pressure Switch?

I happened across this circuit stored on my hard drive.  Can not remember who 

the author is.  It is designed to detect an AC voltage.  The output of an 

alternator is not perfect DC, but has an AC component.  This circuit will rectify 

that AC voltage and output a DC voltage, perhaps enough to enough to enable 

the Honeywell LCD LM SERIES MCU Hobbs meter.  Since the meter only 

requires 0.8 milliamp, its enable pin must require much less than that.

Perhaps someone can suggest  resistor and capacitor values.

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