With the meanwell b versions use a 100kohm linear taper potentiometer, also called b100k potentiometer. The inline resistor is if you happen to get a potentiometer that isn't a true 100kohms. There is usually a tolerance of up to 10% with the cheaper ones. So they can vary between 90kohms -110kohms. Measure the resistance with the ohm setting of your multimeter. It looks kind of like a horseshoe.
Some b versions are reported to go a little over the max rating of the driver. Some people report you can get that by getting a potentiometer that goes above 100k, or by adding the resistor to get to 105k-110k.
If you have to, or decide to, add the resistor you are realistically taking from the bottom and adding to the top. If you happen to get a potentiometer that measures 92kohm resistance, and add a 10kohm resistor. You'll have 10%-102% dimming, 102% if the driver goes over max rating.
Confirmation of Build / layout
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- LED Maniac
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- Location: Ohio, USA
NothinYet is my nickname
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- LED Wizard
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I sure have been looking into 3d printers. Quite inspiring. Been planning to buy one, but still trying to figure where to start with them.Professor Xavier wrote: ↑Wed Sep 26, 2018 4:10 pmAt that price, it must be tempting to look at what a 3D printer could do for you Unkle_Psycho.
One thing about our socialist paradise is that while buying stuff is expensive, the goverment throws so much stuff away. I just went to help some construction guys move house, and when I asked about aluminium, I received maybe 30m of extrusions (various shapes and sizes) in a few days. Left overs from government gigs.
I saw a really cool video of a guy attaching discrete diodes onto square extrusions, and printing a plastic structure that worked as a frame, and caps to the end of the extrusions. He even got his own logo on the end caps. Beautiful.
"Nothing is true, everything is permitted"
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- LED Wizard
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There seems to be quite a lot of choice in the 150-250$ range. Some people warn about big chances of problems and disappointment with the cheap Chinese options. I have to admit I've been a little scared of being too stingy and ending up with a machine I can't complete/ use.
Looks great though!
Looks great though!
"Nothing is true, everything is permitted"
Maybe I should have said that $150 for printer, replacement frame cut from stainless steel, $200, replacement hot end and extruder, $150.
Out of the box Chinese knockoffs are getting better and cheaper everyday though...
Out of the box Chinese knockoffs are getting better and cheaper everyday though...
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- LED Wizard
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Looking neat!
"Nothing is true, everything is permitted"