Replace cooler with surface fans [SOLVED]

[Jose Zazo]

Good afternoon, I'm thinking of using surface fans in place of the cooler but leaving the option to move to cooler later if I see fit and not have to modify the code.

This scheme, would it be valid?



Thanks

[Fernando Garcia]

Hi!

Your idea to use a long wire to connect pin 9 to VCC is very bad.

It can be like this for two wires in parallel:

Or like this to single wire.

Two wires in parallel is better because the maximum current for a 22 AWG is 920 mA and for 26 AWG is 370 mA.

This schematic is valid only to 2 or 3 wires fan.

Best regards.

[Jose Zazo]

I will use the parallel two-wire solution as recommended

Thanks !!