Hello, I am trying to re-use an existing push button voltage meter/gauge. The board contains 4 red SMD LEDS each running off 1.8 volts wired in parallel with a common ground (through push button). What I'm trying to do is use it monitor 18650 lithium cells and have the leds light up progressively based on input voltage so the first one would light up if voltage on that led is over 21 volts, the second if over 23, the third 25, and the last 27-29 volts. The batteries are wired in a 7 series configuration. Basically, I need something to convert the higher input voltage to 1.8 volts for each LED. Anything I use will be in an enclosure so I need something that won't get too hot if possible. Thanks for any suggestions,
-Kevin
-Kevin