$22 Volvo XC90 brushless PWM fan Part 1

THIS MOVES A TON OF AIR. = pick-n-pull salvage - DEMO It squeals a bit a lowest speed because it's used and came off a high mileage wrecked Volvo. 100hz basic freq. Pulse input with 90% duty cycle spins fan at LOW speed. speed. Pulse input with 10% duty cycle spins fan at HIGH speed. Pulse input with 50% duty cycle spins fan at MEDIUM speed. So it's continuous variable from stopped to full speed and any speed in between.

[@silentbravo]

sounds like a beast, could be really useful for the smaller sized radiators commonly used on vintage hotrods

[@ronselberg4704]

Nice Job Anthony

[@aknovaman]

Arduino will be put in a watertight box and will be fine in extreme heat and cold.

[@FrozenNutsGarage]

How will you power it though? Wondering how you give it stable enough power and deal with voltage fluctuations?

[@luctessier2215]

Pic of your box when done?

[@luctessier2215]

Do you thick your stand alone pwm can stand under hood heat and survive? If not what would you suggest as a module?

[@aknovaman]

I am writing arduino code this week and that will work fine in heat conditions.

[@FrozenNutsGarage]

How do you go about keeping the arduino alive in the harsh electronic environment of a car?

[@jn5501]

Link for ebay $

[@aknovaman]

huh? I got them fan from local pock-n-pull salvage yard on half price day. arduino nano on ebay for under $4.