How do I make a fan turn on at the end of a print?
I would like to use the Hackerboard to make a fan turn on at the end of a print but I am struggling to figure out how to make this happen.
My understanding is that I need to power the fan separately and find a way to use the hackerboard just trigger the fan on and off.
I am confident I can figure out the Gcode for this but I am struggling with the hardware. Can anyone help with some type of schematic and maybe some hardware suggestions?
My plan is to mount the fan to the top of the printer.
Thank you!
RE:
Seconding this question. Practical examples of how to wire this card up would be greatly appreciated. This includes how to add the physical pins etc.
RE: How do I make a fan turn on at the end of a print?
I posted in another post, but this would be simple.
Wire your fan to a relay (ie. power via. the relay), and an output pin from the GPIO board to the data pin of the relay.
Then you just have to signal the GPIO output to high on print start, and LOW on print stop. This will then trigger the relay to connect power to the fan on start, and disconnect it on stop.
DO NOT attempt to directly wire the fan to the GPIO board - it outputs only floating voltage, and only between 0 and 3.3V - not enough to run most fans (which are 5V-24V), and certainly not consistent enough. Though enough to trigger a relay.
I wanted to change the world, but God wouldn't give me the source code.