I'm building a ventilation system that will blow air into the back of our parked SUV. Creating a plastic fan enclosure and installing the fans is no problem, but the electronics... well, that's a different story.
I have a 12VDC PowerStation PSX2 car jump starter for powering three or four Kingwin CF-08LB 12VDC case fans wired in parallel.
Online reading leads me to believe that I need to wire some sort of current limiting voltage regulator between the power supply and the fans, and it looks like I can easily buy that kind of module. Unfortunately, I can't figure out exactly what I need - I don't understand the terminology used to describe the components I've found online and virtually all the posts here that deal with the topic use terminology that I don't understand.
I've got no problem putting an on/off switch and voltage regulator in an enclosure and doing the necessary soldering, but I sure could use some help selecting whatever voltage regulator I might need.
The PowerStation jump starter specs:
Volts: 12 Peak Amps: 1000 Cranking Amps: 400 Charger Rating: 650mA Polarity Reversal Protection: LED Warning Battery Type: 18 Ah
The KingWin fan specs:
Rated Voltage: 12 VDC Operational Voltage: 10.8 – 13.3 V Wattage: 0.96 W
As I understand it, each fan will draw about 0.08 amps, so wiring three fans in parallel will draw about 0.24 amps. If the jump starter's 18 Ah Battery Type means the battery has an 18 amp hour rating, it could theoretically power the three fans for 72 hours.
I'd really appreciate it if someone could suggest a brand and model number for whatever component(s) I might need to wire between the on/off switch and the fans, and also confirm that my understanding of the power usage is correct and I'll have no trouble using the jump starter to power the three or four fans for as long as five or six hours.