cheap, dimmable drivers by "thomas research products" + display

[tazztone]

but if you look at my curve u see 5k ohm resulting in 2.8A output with 2 drivers hooked to the same pot. that's definitely more than 70%

[sdfoster22]

I was only getting 70% with a 5k b pot hooked to one driver or two. Hmmm Maybe because I was reading from the 40w driver? Could the resistances be different on different wattage drivers?

[tazztone]

in the beginning I made some tests with the 50W 24-72V CC TRP driver hooked up to one F562B, where i measured wattage drawn from the wall with various resistors applied to the dimming leads:

TRP 50w potentiometer test.png (9.88 KiB) Viewed 1423 times

[sdfoster22]

I'll grab some 5k ohm a pots and 10k ohm a and b pots. When I start building the light I'll get voltages and current readings from each strip.

[sdfoster22]

in the beginning I made some tests with the 50W 24-72V CC TRP driver hooked up to one F562B, where i measured wattage drawn from the wall with various resistors applied to the dimming leads:
TRP 50w potentiometer test.png

I've been reading on riu. They are reporting that the linear taper pots are easy to dial in. Audio logarithmic pots are harder to dial in, and most of it will be on one side of the curve(how your curve looks)

[tazztone]

They are reporting that the linear taper pots are easy to dial in.

yeah i imagine they are better for HLG drivers because they have a linear response curve (25K = 25% power, 50K = 50% power, etc.).
but these TRP drivers have logarithmic response curves. that should be counteracted/"linearized" by using a log. pot.
the idea here is that this A-type pot and its own log curve "neutralizes" the log curve of the driver, resulting in a (somewhat) linear dimming response when turning the pot.

so i made the test again, but this time with Fseries instead of Vesta. because 2x F562Bs don't reach the driver's max of 25V:

so in this case a 10K pot only gives 90% power

[infosponge]

How many of those 75 W drivers do you think can be hooked up to a single wall plug? I’ve got eight drivers, I figure I would be pushing it trying to wire all eight of them up together but just curious how many I might get away with

[tazztone]

this wall dimmer you have is a 0-10V dimmer?
UPDATE: sorry thought wall dimmer not wall socket

[sdfoster22]

How many of those 75 W drivers do you think can be hooked up to a single wall plug? I’ve got eight drivers, I figure I would be pushing it trying to wire all eight of them up together but just curious how many I might get away with

It depends on your cord rating. If you run 220v or 110v for electric. It also depends on what amp breaker the outlet your drivers are plugged in to, and what other things are ran off that breaker.

[tazztone]

i mean 8 drivers 75W, that's only 600W. a microwave has more than that. u take standard 1.5mm2 copper power wire u will be fine.