I am wanting to wire up a laser on the duetwifi. I am using 24v on the duet and 24v fans also. So would I use the 12v power supply and run the PWM adapter that came with the laser and connect the TTL wire to Pin 8 (heater 3) on the expansion? I attached photos. The laser power supply is 12v 5A and the laser is an Eleks 450nm 15w.
The heater pins on the expansion are active low, so you will get a glitch turning the laser on while the Duet initialises itself. I suggest you do the same as we do for the heater mosfet drive circuits, which is to use a 74HCT02 gate powered from 5V to gate the signal with +3.3V, and invert it and level shift it to 5V.
Thank you, Sir!!
nirmal005 last edited by
I am new to 3D printing, so please forgive my ignorance.
I am planning to buy DuetWiFi so that I can connect a 12v 15W 450nm TTL controlled laster module. The answer to this exact question is what I am looking for.
@flippnswitchez, Were you able to make it work? If yes, would you please share your circuit schematics? It would be really helpful to know what needs to be connected where.
@nirmal005 I was sidetracked and have not finished yet, but yes it should work. I was sidetracked by some troubles getting my printer back up and working from the switch between boards. I also added a 24v power supply because of my bed, so I also had to order a step-down module for the laser.