![]() ![]() ![]() Note: I do NOT want to use 5V fans here, I'm making liquid cooling for a laptop (and essentially turning it into half-desktop), already have 12V fans and everything working, this is the last piece :-) 50% of fan speed) always and never go below that - was thinking to use another voltage divider to bring 0.5V to the analog input of LTC6992 and only leave the 1st voltage divider to raise that 0.5-1V - anything you see wrong with that approach? Perhaps I need some diodes to not mix those two?Īny other comments/suggestions to the above-mentioned? use a voltage divider (2 resistors - R1=10kohm, R2=2.5kohm) to map 0-5V to 0-1V input of LTC6992.use LTC6992 ( ) to map 0-5V from laptop motherboard to PWM for my new 12V fans.use external supply of 12V (or internal from laptop but 12V, don't want to mess with stepping up the 5V).I need to control 12V fans (w/ PWM so 4 pin) with a laptop motherboard which originally had 5V fans (3-pin only so voltage-controlled), so I want to: ![]()
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