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Now i'm wondering; are there voltage regulators out there that do not burn off at least 1,2V? With the ones i have now (LM317) i have to input at least 1,2V more than i can output, it would really help my quadruped if i could find any that only waste 0,5V.
I thought to have found them in the category low drop out regulators, but now i'm not so sure...
Thanks for the answers so far. My lamp features a 1W red, blue, green and white led. I regulate their currents with a LM317 per led, and dimm them through a transistor hooked to my arduino. The lamp is plugged into the wall outlet so power wasting isn't really a concern.
I want to regulate the voltage so that my servo's are always equally strong, the situation now is that with 6 Nimh cells fully tanked up at +/-1,4V per cell my servos receive 8,4V. Any more and they will burn and die. By the time the cells are getting empty the voltage is about 1,1V per cell -> 6,6V on my servo's. The contrast between servo force at 6,6V or 8,4V is just too big to have my quadruped walking fluently at any battery level. Hence the plan to regulate voltage. I am willing to add one cell if it can fix this problem, but with a +/-1,2V loss through the regulator this results in 7,2V when the cells are full (9,6V regulated) and 6,5V if they are empty (7,7V-1,2V loss).
It would stop the excess force at full battery but wouldn't fix the low battery force shortage.So my options are; adding 2 cells and waste like 1,5 of them or find a regulator with just 0,5V loss. The first one I already dismissed It should be able to handle at least 4A, but i'd be more comfortable with 6A or even 8A for planned servo upgrading..
It is typical of noobs to want lots more than needed, disregarding that it most often will have a negative effect one way or another, but hey, at least it's only money wasted in this case So, go ahead and get my favorite high power regulator, the
But just out of curiosity would it be possible to have two or more lower current regulators in parallel?