Limit Switches with LED's

[m_c]

The plan above won't work as having just checked the datasheet for the BOB, the limit switch input is gets pulled to ground, so it won't provde enough power to light up anything, and adding LEDs in that way will probably be enough to pull it to ground.

Using some kind of high impedence sensing is the only way to make this work without affecting the BOB input.
For design/build simplicity and to avoid dealing with individual chips, I'd suggest an Arduino UNO. A quick sketch (arduino talk for code/programme) will do what you want easily, the inputs are high impedence by default, and it'll power LEDs easily.

[JAZZCNC]

Can't he just use a separate 5V supply and use the NO contact to make the circuit when the switch trips.? Simplizz enough to me.!!

Edit: Like this.?

Ray the same 5V supply that powers the Bob would work just take another feed from it.

[Robin Hewitt]

Or, use a double throw microswitch and have red green on every switch, fully independant and all on one 3 wire loop, easy peasy.

[manofgresley]

Hi Robin

Many thanks, still confused, would that be a SPDT? I thought I was trying to illustrate that in my drawing, or did I get that wrong?

Regards

Ray

[manofgresley]

Hi Jazz

Many thanks again, will this stop the machine from moving if activated.?

Regards

Ray

[JAZZCNC]

Hi Jazz

Many thanks again, will this stop the machine from moving if activated.?

Regards

Ray

Yes Ray machine will stop and the relevant tripped switch LED turn on.

Easy to test off machine just run 5V+ wire from PSU to LED/resistor then thru NO contact of switch that Neg (-) is connected to BOB (-). the BOB will return to Ground of the PSU.
If it works Mach will go into reset and the LED light up while switch held in.