Having almost got an Espduino and cnc shield v3 to run steppers etc and fire a laser, it begs the question: can I generate a negative voltage on one of the pins to trigger a Co2 tube as in a K40?
many thanks.
The K40 LPS uses 0v - 5V to trigger the firing of the CO2 tube. No negative voltages are required.
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Interesting, I was under the impression CO2 required a negative voltage.
No it’s negative logic. 0volt enables the laser and 5volt turns it off.
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Okay. Interesting, thank you.
often called “active low” vs “active high” and there are even symbols used in chip data sheets to show active low( with a line over the signal name ).
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@Lol999 If you can invert the PWM signal in the firmware, do it there. If your firmware can’t do that (like grbl), the you can use a n-channel mosfet to invert the signal.
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Thanks Claudio!