229Views5Replies

Author Options:

5v to 12v convert Answered

Hello,
I want to connect a portable solar powered rechargeable to 2 DC fans of 12v to cool my car.
1. I have 2 options of portable solar powered: (A) 1500mAh, outputs: 5.5V / 800mA (B) 2000mAh, outputs: 5V 500mA
    which one is preffered to connect to those PC fans?
2. most of the PC fans are working at 12v. I don't quite sure if I'll build simple 5v to 12v regulator it will works and produce enough airflow.
Thanks.

Discussions

The forums are retiring in 2021 and are now closed for new topics and comments.
0
MadD14
MadD14

2 years ago

How can i use these components to get 12-15v output?

IMG_20181121_151206.jpg
0
Downunder35m
Downunder35m

Reply 2 years ago

From what I see you can't.
There is a rectifier, transformer and even some capacitors but I have no clue for what voltages they are.

0
Goodhart
Goodhart

9 years ago

You will not be able to use "just" a regulator in order to boost voltage.

It is simple enough to double or triple AC voltages, using a step up transformer,  DC is a different animal and would require either special ic's or conversion to AC, and then back rectified back to DC again. All that will waste precious power (you're amperage from the source will decrease as you increase voltage, forgetting even about losses due to heat and other factors, etc).

Without knowing the power draw (amperage) of the fans, it would not be possible to even start a suggestion here.

0
ashakif
ashakif

Reply 9 years ago

most regular 8cm fans are 12V 0.15-0.3A.
What you offer is waste of a lot of power.
some fans can work under 5v but the airflow is low, so I don't know if it will breeze out hot air from my car.

0
Goodhart
Goodhart

Reply 9 years ago

reducing DC voltages is easy enough, stepping it up is much more complicated. AC is easy to step up or down.