Laser PWM connection to fan port

[sarvan]

Hello Folks,
Just to give more information to get the appropriate feedback, posting the here again,
i have duet2wifi running RRF3.3. want to connect a 10W laser. link-https://www.aliexpress.com/item/1005001644617543.html?spm=a2g0o.productlist.0.0.252e475d54Jl2C&algo_pvid=5777b0cf-0500-4528-a597-9b947e75cfe6&algo_exp_id=5777b0cf-0500-4528-a597-9b947e75cfe6-10&pdp_ext_f={"sku_id"%3A"12000016952934727"}.
but, the driver board has a 12v-PWM-GND. it seems like the PWM is capable of 5V. in this case, can I just connect the fan1 port to the PWM as shown in the pic?
no need to connect anything to the 12V?

or do I need to make that breakout board to get the clear signal (must need to use any of the heater expansion breakout connections?

[Phaedrux]

@sarvan said in Laser PWM connection to fan port:

no need to connect anything to the 12V?

I would think that yes you would because that would be the power source for the laser module, no? Or does it have a separate source? In which case, perhaps it's optional?

[sarvan]

@phaedrux I think the 12V pin is the laser's power source. but, my question, from the wiki page for the laser connection. it show should use the external circuit to get the right signal to operate the laser. that confuses me.

[o_lampe]

@sarvan
Usually the barrel jack connector is the power In plug for the laser and fans etc...
The 12V pin on the PWM connector can be used to feed external devices from the same PSU or just use a potmeter to control laser power.

For you it means you could feed the Duet with a 12V supply and use a heater output to feed the laser thru the barrel jack. An emergency button and keylock switch between Duet and Laser can save your eyesight or your childrens health.
The PWM port can be connected as I described in another thread. ( same way as your picture shows)