All Questions
Tagged with 12v power-supply
86
questions
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Need more positive than negative current
My power supply collapses due to uneven positive and negative current draws.
I need about 2A of +12VDC, 1A of +9VDC, and 0.5-1A of -12VDC in a design I’m working on. I’d like to avoid using multiple ...
0
votes
1
answer
113
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12 V power supply for blower motor
I'm looking for a power supply to run a small propane RV furnace. The furnace only draws about 5 A while operating, to run its blower motor and the electronic ignitor plus the circuit board that ...
- 129
3
votes
2
answers
127
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DC 12V automatic power transfer system to supply Wi-Fi and ONU
I'm from Ukraine, so there are very few options to test something and get support.
I need to power my Wi-Fi router and fiber optic modem when utility is down. It is available 4 hours by four down. Wi-...
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2
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163
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How to regulate voltage from marine battery? [closed]
I have a telescope with a number of components that run on 12vdc.
I want to create some sort of power regulator to supply power to my components without frying anything. Is there some kind of voltage ...
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1
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0
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116
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Adding 12V power supply to existing Solar MPPT load circuit
I have a camper which has a small 12v power system consisting of a 50w solar panel, a generic 20ah LiFeP04 battery, an a 15A Victron MPPT controller whose 12v load output feeds directly to a fuse ...
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-2
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2
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4k
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Can I run a 6V lamp on 12V without damage? [closed]
I am modifying LED headlamps and the LED chips inside says 6V and 2W. However. It came with a pack of two 18650 batteries so it gets 8.4V max when they're full and 7.2 when those are going empty. So ...
- 31
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2
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2k
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Playstation 2 - power supply 12 V pins
I have a 110 V Playstation 2 which I've been using for more than 10 years with the help of a 220 V to 110 V step-down adapter. The problem is that the step-down adapter has gone bust and the ones ...
- 690
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309
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Adapting a 12V Dell power supply to a Lenovo PC - very naive questions
I bought on Amazon a chinese power supply for my Dell Latitude. It plugs into a 12V socket on my car and feeds 19.5V to the PC. So far, so good.
Now I want to feed another computer, a Lenovo thinkpad ...
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1
answer
1k
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24V optocoupler with 12V?
I recently picked up a "24V Voltage Level Current Converter Module 80KHz 1-Channel Optocoupler Photoelectric Optoisolator 12V PNP NPN Signal Converter PC817 Optocoupler"
Can I supply this ...
0
votes
1
answer
842
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Will a stereo amplifier with a power supply range of 12V to 25V DC run off a 12V car battery?
If an amplifier has a power supply input range of 12V to 25V will it actually run off a 12V DC battery system such as a 12V solar system? Here is a link to an example amplifier:
https://fosiaudio.com/...
- 103
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1k
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Powering many external 3.5" HDDs (USB) by an ATX PSU
I have many external USB disks like this one, that I would like to power from a single dedicated ATX PSU, instead of one 12V power adapter per disk. Because each power adapter would take one power ...
- 101
1
vote
0
answers
168
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How many Ah do I need for 12V battery to power 76 LED lights (0.84watt each) using a 500W inverter to power for 6 hours?
Looking to build a power pack with a 12V battery to inverter in order to power 4 string lights totaling 76 LED bulbs each with 0.84 wattage. Total time to keep lights on is 6 hours. How many Ah do I ...
2
votes
1
answer
394
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Is it bad to load one rail of a power supply vastly more than the other?
I am trying to modify a Delta DPS-400AB-17 server 1U power supply to support a desktop motherboard and graphics card. The power supply has an 8 pin 12V EPS connector attached to a 21A 12V (252W) rail. ...
- 21
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2
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179
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Relay for Solar System as Backup Only
Background
I'm working on a seismic alert network and seismograph station at my school in Puerto Rico. We're building a solar system for the system to continue running during a potential seismic event....
- 103
0
votes
2
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100
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5v to 12 Power Supply
I have really no idea about electronics.
I am trying to provide IR lighting for my night camera that I use with the raspberry Pi.
The Pi is powered by a 5v usb power bank. The IR requires 12v.
I ...
- 135