And down the rabbit hole we go…
This is the laser I purchased from Banggood:
I tried to connect the 12v Fan 0 port from my SKR Pro 1.1 to the PWM/TTL connection on the laser driver board before I knew better and it made no difference to the laser output which was full power from the moment it was plugged in. They are not kidding about these things being dangerous!
No amount of fan speed control changed anything on the laser even though I could meter the connection and the voltage was going up and down.
More forum searching led to this post:
where @dkj4linux talks about the dangers of connecting 12v to a port expecting 5v
Back to Banggood to see what my laser needs
Sorta looks like it can take both but probably 5V I’m thinking. Can anyone confirm?
My main question are:
- If I haven’t already fried something by connecting 12 volts to it, where can I get 5V on the SKR Pro 1.1 board
- How do I modify my dual endstop firmware to use those pins on the BIGTREE TFT Laser buttons?
I see some pins labeled 5V in the lower right of my board
But I don’t know what piNs they are or if they will work.
Here is hopefully the correct schematic:
Here are another couple pictures of what my setup looks like. Thanks in advance to all you geniuses!