All Questions
18
questions
1
vote
1
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90
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Looking for a circuit to run a 12 V toilet exhaust fan when utility power fails
I have a tiny house.
Recently my inverter failed and it could take weeks or months to have it fixed. It's a 48 V DC solar to 240 V AC, that is intermittently working with a non-working 5 kWh battery.
...
- 13
0
votes
1
answer
154
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Can I solder two 12 VDC fans to one end of wires of single Molex connector?
I have 2 Sunon fans (12 V, 415/519 mA - max, 5.4 W/6.22 W - max). I want to solder both onto the end of a single Molex connector cable extension (bought from a local store).
Molex connectors all-4 ...
-1
votes
1
answer
55
views
Is an 'Or' circuit what I'm looking for?
12V DC 10-30 amps, dual input relay. Should this be an 'Or' circuit?
Back Story - classic car, currently completing an EFI conversion, which is more or less separate from my quest, but it initiated ...
- 1
1
vote
1
answer
622
views
How to run a car radiator fan with a PC 450 W SMPS?
I have a car radiator fan which when measured with a multimeter on a 12 V car battery draws 4.7 A. I've been trying to run it off an old PC SMPS which is rated at 450 W with a max. current of 18 A at ...
- 11
1
vote
1
answer
533
views
Using 2 5V pins to get 10V [duplicate]
I want to to my RaspBerry Pi 4 with an old small CPU fan. However it's a 12V fan. Is it possible to use 2 of the 5V pins on the board to total to 10V? Sorry if this is a dumb question. I haven't ...
1
vote
3
answers
798
views
MIP2M4 mosfet, Arduino Uno and a 12v PWM PC fan
First, I'm am new to using transistors and MOSFETs in electronics circuits.
I have extremely basic notions of electronics, and am able to setup and use "of the shelf" boards and Arduino modules, and ...
- 135
3
votes
1
answer
455
views
12V variable-speed fan as a function of temperature using 555 timer
I would like to turn the car fan into a variable-speed fan using a the analog temperature sensor of the car, and a 555 timer.
While temperature decreases, resistance (of the sensor) increases. Can I ...
- 31
0
votes
2
answers
4k
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Transistor use - Basic fan speed controller
Someone mentioned to me that they wanted to replace a fan switch with a potentiometer to adjust the fan speed. This seemed a reasonable request, and being eager to learn, I drew up a schematic using a ...
- 1,089
-2
votes
2
answers
4k
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Can I connect 4 12v fans to 1 USB cable plugged into a wall? [closed]
I bought 4 computer case fans for a project I'm doing. I know how to wire just one fan to a USB plug that I put into my wall that makes the fan work. How would I go about connecting 3 more fans to ...
- 1
1
vote
2
answers
4k
views
control speed of 12v dc fan with thermistor
As a learning exercise, I am trying to control a 12VDC/0.18A computer fan with a thermistor. As I am planning the circuit (and I certainly can be wrong in my calculations), I plan to have a 12V power ...
- 13
-2
votes
2
answers
1k
views
Preventing a voltage drop using solar panel and fan
After failing to find an answer online I hope someone here would know how to solve n issue I have. I use a 12v, ~10w solar panel to activate a couple dc fans.
The problem is that when activated, the ...
0
votes
3
answers
3k
views
power 12v fan using laptop charger while running laptop
I have a laptop with partially damaged internal fan. Dont want to buy new one. I am thinking of swapping the internal fan to a 12V fan. The 12V fan I have can fit as it is small. Internal fan is 5V.
...
- 43
1
vote
1
answer
1k
views
Powering thermoelectric cooler and fans with 12V input
I was considering a project with a thermoelectric cooling module rated 60w and so obtained an AC power supply of output DC 12V and 4.16A. I'm very new to electronics so excuse me for the basic ...
- 13
3
votes
1
answer
2k
views
Why is this switching transistor heating up?
I am building control board for fan cooling.
It runs from 12V power source, and it is controlled by input analog signal 0.3V to 1.2V which just controls speed of fan.
Problem is that switching ...
- 5,508
1
vote
1
answer
4k
views
Powering a 4-Pin stock CPU heatsink fan with an external power supply
I have scoured this website and the rest of the internet looking for a solution to my particular issue, but as of yet I have not found an answer. If this is a duplicate question I am sincerely sorry, ...
- 11