Hi,
I would like to build a laptop cooler with old computer fans i grabbed.
If possible, would like to power them from USB (dont have usb3.0)
My questions are here:
- Should i mount them on parallel or series? i guess parallel to keep max voltage for each.
- About amperage, should i use resistors? and where to put them in the circuitry?
- how many fans max can i use as its powered by USB?
All the fans are different tho... here are the specs:
(All are 12v)
- 0.06A
- 0.08A
- 0.1A
- 0.14A
- 0.15A
- 0.17A
- 0.27A
If USB is not possible, i have an AC Adaptor 9v 300mA (so ill need resistor). Any help or the curcuitry is welcome, since i heard Amp is multiplied is using a parallel schema.
thanks a lot, im an electronic beginner much.
PS: I made a Schema, lets say i use only the 4 bigger fans. (order doesn't mean much). Could you tell me how to know what Resistor values to use? (if needed of course...) Thanks a lot!!!
I would like to build a laptop cooler with old computer fans i grabbed.
If possible, would like to power them from USB (dont have usb3.0)
My questions are here:
- Should i mount them on parallel or series? i guess parallel to keep max voltage for each.
- About amperage, should i use resistors? and where to put them in the circuitry?
- how many fans max can i use as its powered by USB?
All the fans are different tho... here are the specs:
(All are 12v)
- 0.06A
- 0.08A
- 0.1A
- 0.14A
- 0.15A
- 0.17A
- 0.27A
If USB is not possible, i have an AC Adaptor 9v 300mA (so ill need resistor). Any help or the curcuitry is welcome, since i heard Amp is multiplied is using a parallel schema.
thanks a lot, im an electronic beginner much.
PS: I made a Schema, lets say i use only the 4 bigger fans. (order doesn't mean much). Could you tell me how to know what Resistor values to use? (if needed of course...) Thanks a lot!!!
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