12v

  1. i=p/u

    12v power supply units for cameras

    12v 5A power supply for four cameras, if using shotgun cable with the power cores being 0.15mm, what is max distance from the cameras the power supply can be, as these are normally mounted close to camera itself. I know I can power locally to camera but would prefer to keep it all together. Any...
  2. A

    Unexpected/weird On/Off switch behavior in 12v DC System

    Here's the setup: 400ah battery bank on 12v has a positive line that connects to a 400a fuse, then to a Blue Sea On/Off Switch, then to the positive Bus Bar, then to the Fuse Box, then to the Loads. Loads come back on the negative to the Fuse Box, then the negative Bus, which goes to the...
  3. captaincaveman

    Best way to locate a fault in garden 12v lighting

    Hi Guys n Gals, I'm a little stumped on a job and was wondering if anyone could advise? I've got 3 drivers going to 3 sections of garden lights. Two of the three sections are not working (about 10 lights). I presume it's two sections due to the number of lights and I can't find a third section...
  4. R

    Confused about the wiring diagram on INKBIRD 1000F 12V

    How to connect a ptc heater to a controller, so... the controller actually turns the heater ON and OFF when it reaches the desired temperature? I need to keep stable 30 deg temp, but there is no relay switch on the heater (I think that's how it is called), so if the heater is connected directly...
  5. 2

    Converting 240VAC to 12v DC

    What components are needed to convert 240VAC to 12VDC?
  6. Carolina

    Wiring 12V bulbs in series or...?

    Hope this is the correct forum for this. I have a chandelier that holds 18 bulbs, it's not in use since ages ago and I was planning to restore it to its former glory. Here's the thing, I also have more than 80 incandescent light bulbs taking up space in my workshop (long story) but they're all...
  7. B

    trying to wire a DPDT 12v relay in truck

    HI, Hoping someone can help me here as I am a novice. This is on a vehicle so I hope thats ok but I think it pertains. Long story is I have a old truck that has a valve that went bad and I cant get them anymore. It has a switch on the dash that has a single wire back to the valve that only has...
  8. T

    Battery Need 12V 2A Battery and connector

    Hi, I sometimes wish to use my mobile router off battery. Its one of these https://www.4gltemall.com/huawei-b625-261.html#:~:text=Huawei%20B625%2D261%20is%20a,name%204GEE%20Home%20Router%202. It needs 12V, 2A. I can get a battery for this. But what is the name of the connector used on the router?
  9. R

    A.c to D.c 12v charge

    I have a 12 volt power supply unit with 15 percent up or down voltage selector so I can achieve little more than 14 volts current draw is 30 amps maximum. It has over volt safety thermal safety and short circuit protection. Powered by 120v ac. The question is if I added a fuse 30amp and...
  10. Y

    Battery 12V voltage drop dual battery camper installation

    Hi there I can't wrap my head around a problem I have when trying to connect my dual 12v battery system in a camper. When I plugged in my VSR ( Orion from the brand Victron) i measured the + input was 3 volts although engine running (and app saying 14v input...). I thought the wire were too...
  11. M

    Can 12v ac be used through a light switch within 1 meter of a swimming pool.

    I need 6 switching light circuits to control 12V LED light in Zone 1 of a pool, the problem is that Zone 1 is as you open the door to the building. I been thinking about using a 230v to 12v transformer in the plant room to a grid switch near the pool. This could switch 12v to a 230v contactor...
  12. E

    LED Power Rating on information on my 12v lamp

    On the LED lamp I have I have the following information, 12v-440mA-3.4W, these figures don't stack up according to Ohms Law, I'm not too familiar with load ratings and calcs regarding LED's
  13. B

    12v light delay question

    Hi all, I’m doing my bathroom up currently and in the process, I want to look at the delay in one of the lights 3x downlights are 230v, one is 12v as it’s got an Integrated fan. I know the couple second delay is due to the voltage dropping to 12v, but is there any way to eradicate this? It’s...
  14. C

    12v - 5v stepdown for usb lights in van

    Hi All I've just fit some led strip lights to my campervan and face-palmed when I saw they were USB and on 5v, not 12v. I have cut the usb end off and wired to a switch panel in the van that runs off the 12v leisure battery. As a quick test, I've powered on to check all OK and fine. I can't...
  15. D

    Battery Adding 12v Deep Cycle Marine battery for CPAP and camping

    I'm wanting to add a 12v deep cycle battery to my minivan to power some items. These are a CPAP machine and some small vent fans (like USB powered computer fans.) At the rear of the van is a 12v cigarette lighter socket I'd like to use. Can this be connected directly to the battery (positive to...
  16. B

    12v transformer

    Hi vent-axia Svara bathroom fan going in zone 1, vent-axia PSU centra selv lo-carbon (12v transforme) question = how far can the PSU be from the fan, i would like it about 1.5 meters from the fan (cable length) or must it be as close as possible (in the loft) to the fan 1.5mm twin+earth cable...
  17. J

    LED Hooking up 12v LED strips and removing 120v transformer

    Hi all, I converting a van to a camper and wanted lights for underneath the kitchen cabinet. I purchased this led light strip for Home Depot (https://www.homedepot.com/p/Commerc...-RGB-LED-Strip-Light-Kit-DT8800-16F/312590609). The first one I bought with USB connection just wasn't bright...
  18. K

    Battery Keep Bluetti battery device always connected to 12v

    Hi, TL;DR Will I short the car battery life by having a external battery always connected to the 12v port? I'm planning to buy a Bluetti battery (500wh) for my camper and connect to it a mini fridge, so to keep battery level as high as possible, I assume the best option should have it always...
  19. W

    G4 LED's & Aurora AU-LED16T 12v constant 16W LED Driver, does it matter about the polarity ?

    Using these lights (wired in parallel) 6 x 2W is ok to use a 12V constant voltage 16W led driver Aurora AU-LED16T. My question is they are a G4 fitting which goes, either way, does the polarity of the bulb cause an issue or do electronics inside take care of this. Many thanks in advance.
  20. S

    Victron Phoenix Inverter 12V 2000Va Smart inverter installation

    hi all new here :) right so am upgrading my inverter set up in my work van i use this set up for tools and camping the new inverter going in is a Victron Phoenix Inverter 12V 2000Va Smart what i am trying to work out is will i need to run it in to a 240v consumer unit RCD /MCB. my old ivereter...

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