I know it seems silly but this is about being economical. Im comming up with a reliable solution that can be implemented by someone who is not particularly skilled. Although i myself have the same issue, i intend to build a driver which makes use of the monitors brightness PWM signal.
Is problem is this, wacom cintiq monitors, namely the 24HD, have faulty inverters or CCFLs, either way, the backlights die pretty young in some of them.
An LED replacement kit exists, however it turns out that the kits driver, is not a dual output driver, it has two output plugs, but, its a shared 500ma across two LEDs in parallel, and these LEDs can easily take 500ma each without needing a heatsink, im testing up to 700ma though if its not bright enough. I havent yet determined what the maximum current for the strips is, the manufacturers are no help.
I suspect the drivers output 500ma so that the kit may be used as is in monitors that only take 1 strip instead of 2, without blowing the 1 strip, since the total current is still less than its maximum, which is over 500ma i know that much at least.
One of the simpler solutions ive come up with is to use a very common 900ma constant current driver which claims can work off 24v, ive yet to confirm though. it costs $2 ea, and then, i want to use it to supply a linear current regulator which can output between 500ma and 700ma, to each of the 2 LED strips.
I need to be able to adjust the current via resistor or capacitor, doesnt really matter, though resistor is preffered.
What would be a good regulator to use for this, considering that the LEDs operate within 9-10v (10v @ almost 800ma, but this varies).
I understand common sense would be to do something different, but, im asking about this specific scenario, imagine its set in stone, has to be done.
that said, what else might be a good option for driving 9v LED strips from a 24v power source, would a simple, say, XL4015 stepdown converter be sufficient? as in just one running both strips in parallel? or maybe two XL4015's, one for each strip, does it need to be one for each? it doesnt need dynamic control from the PWM signals or anything, it just needs to remain at a comfortable brightness since the output the kit provides is like bare minimum, the lowest possible setting you might be able to achieve on a monitor, its a 24" screen after all, you need more than 4W
Is problem is this, wacom cintiq monitors, namely the 24HD, have faulty inverters or CCFLs, either way, the backlights die pretty young in some of them.
An LED replacement kit exists, however it turns out that the kits driver, is not a dual output driver, it has two output plugs, but, its a shared 500ma across two LEDs in parallel, and these LEDs can easily take 500ma each without needing a heatsink, im testing up to 700ma though if its not bright enough. I havent yet determined what the maximum current for the strips is, the manufacturers are no help.
I suspect the drivers output 500ma so that the kit may be used as is in monitors that only take 1 strip instead of 2, without blowing the 1 strip, since the total current is still less than its maximum, which is over 500ma i know that much at least.
One of the simpler solutions ive come up with is to use a very common 900ma constant current driver which claims can work off 24v, ive yet to confirm though. it costs $2 ea, and then, i want to use it to supply a linear current regulator which can output between 500ma and 700ma, to each of the 2 LED strips.
I need to be able to adjust the current via resistor or capacitor, doesnt really matter, though resistor is preffered.
What would be a good regulator to use for this, considering that the LEDs operate within 9-10v (10v @ almost 800ma, but this varies).
I understand common sense would be to do something different, but, im asking about this specific scenario, imagine its set in stone, has to be done.
that said, what else might be a good option for driving 9v LED strips from a 24v power source, would a simple, say, XL4015 stepdown converter be sufficient? as in just one running both strips in parallel? or maybe two XL4015's, one for each strip, does it need to be one for each? it doesnt need dynamic control from the PWM signals or anything, it just needs to remain at a comfortable brightness since the output the kit provides is like bare minimum, the lowest possible setting you might be able to achieve on a monitor, its a 24" screen after all, you need more than 4W