Wiring Drewtronics S5000LED probe in ESS/MB3

[lpm1]

Hello,
I'm struggling getting a Drewtronics s5000LED probe working on a ESS/MB3.  I can get the probe to trigger in Mach4 but the probe LED does not illuminate, or I can get the probe LED to illuminate, but not trigger in Mach4.  When I get the probe to trigger in Mach4, I think I have the probe wired in backwards so the LED is essentially out of the circuit.

 I think I am in need of a pull up resistor to help get Mach to trigger as well as light up the LED, but I don't know how to wire one into the MB3 inputs.

Any help would be appreciated.

Lynn

[Weerasak]

I think I am in need of a pull up resistor to help get Mach to trigger as well as light up the LED, but I don't know how to wire one into the MB3.

Yes, It's possible to use an additional resister.

I couldn't find the probe schematic from seller website.
Can you provide it?

[lpm1]

I have a JPG of the probe schematic, but can't figure out how to post the image or file    ...

[Weerasak]

Get an account from...

https://www.flickr.com

Upload your photos, then get the link and embedded into the contain.

[lpm1]

s5000LED_schematic

[Weerasak]

Yes you need a pull up resistor connect between common and X input as shown in the picture.

The value is around 2-3k ohm with high wattage because it needs to stand up to the heat.

If you need a bright light on probe LED, you need to by pass the internal 10k resistor or put a copper wire across 10k resistor. In this case the value of pull up resistor becomes 3-5k ohms.

[lpm1]

Thanks Weerasak,

The resistors are on order and I will give it a try!

[lpm1]

Weerasak,

I used a 2.5k ohm resistor and it worked perfectly.  Thanks for pointing me in the right direction!

[Weerasak]

Thanks for the update.