Using Hall Effect sensors as limit/home switches

[Mr.Chips]

After reading a few posts about the advantages of using hall sensors I have ordered some for my CNC.

Instead of the bare A3144 sensor I ordered it as a module, thinking it would save me some time and make for a better signal, but I’m not sure, so I need some advise.
Here’s the module from Amazon.
?
https://www.amazon.com/dp/B072VVRNB7..._0Ek0CbZTZWECE

Looks like I just need to supply 5 VDC and ground to power it, and connect it to the appropriate pins on the control board.

Could someone make me a simple drawing showing labeled connections? If it can show point to point connections for one axis I can figure it out for the rest.

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[maxspongebob]

Did you forget to add the link?

[maxspongebob]

Also, that sensor requires a magnet. The sensor detects a magnetic field.

Did you look at other sensors that detect ferrous metal?
https://www.amazon.com/Jhe-LJ8A3-2-Z...-2-spons&psc=1

[Mr.Chips]

hello can anyone help?

[maxspongebob]

From Amazon:

Module Interface Description
VCC: Positive power supply, 3.3 V to 5 V
GND: Negative power supply
DO: Digital signal output
AO: Analong signal output

All you need to do, is hook the VCC Pin to +5V DC, Connect GND to ground, and DO is the digital output that you would connect to your BOB on one of the digital inputs.
No need for the AO pin as that is an analog signal. You don't need that.

Also, then mount a magnet on the machine where you want the switch to trigger. I would expect that the Output of the module DO will go low (zero volts) when the magnet gets close to the sensor. When it is not close, it should be high (5 volts). Also, it looks like the module has 2 LED's on it so you can tell then the magnet has triggered the sensor.

[Mr.Chips]

From Amazon:

Module Interface Description
VCC: Positive power supply, 3.3 V to 5 V
GND: Negative power supply
DO: Digital signal output
AO: Analong signal output

All you need to do, is hook the VCC Pin to +5V DC, Connect GND to ground, and DO is the digital output that you would connect to your BOB on one of the digital inputs.
No need for the AO pin as that is an analog signal. You don't need that.

Also, then mount a magnet on the machine where you want the switch to trigger. I would expect that the Output of the module DO will go low (zero volts) when the magnet gets close to the sensor. When it is not close, it should be high (5 volts). Also, it looks like the module has 2 LED's on it so you can tell then the magnet has triggered the sensor.

Could this device be used as a Normally open as well as a normally closed device?

[maxspongebob]

There is not enough information in the Amazon description to say yes or no. However I suspect the answer is NO.

[Mr.Chips]

So connect the DO output to pin 13 on X axis home and that will do the trick, Correct?

[skrubol]

Might work, might burn something out.
That hall module will only work if pin 13 is pulled up to between 3 and 5.5v and is triggered when the pin is grounded. If it's pulled down and triggered when voltage is applied, it won't work. If it's pulled up to a higher voltage, it may work (the comparator is rated to 36v,) but depending how the hysteresis circuit is wired, it may not work correctly, or may burn something out.

[Mr.Chips]

From Amazon:

Module Interface Description
VCC: Positive power supply, 3.3 V to 5 Version
GND: Negative power supply
DO: Digital signal output
AO: Analong signal output

All you need to do, is hook the VCC Pin to +5V DC, Connect GND to ground, and DO is the digital output that you would connect to your BOB on one of the digital inputs.
No need for the AO pin as that is an analog signal. You don't need that.

Also, then mount a magnet on the machine where you want the switch to trigger. I would expect that the Output of the module DO will go low (zero volts) when the magnet gets close to the sensor. When it is not close, it should be high (5 volts). Also, it looks like the module has 2 LED's on it so you can tell then the magnet has triggered the sensor.

So that would be normally closed?
I’m finally getting around to try and hook this up to my machine. I can find all kinds of arduino wiring diagrams but not one for a Mach3 BOB machine and advice sure would be appreciated. I don’t want to assume anything.
Thanks