All Questions
14
questions
0
votes
1
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79
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DIY power source input 6 VAC, 9 W, 1.5 A, output 6 VDC, 1.5 A
I have an AC generator of 6 VAC and 9 W power output. It is on an old bicycle motor, a BSA winged wheel. I intend to run NiceLite 3-6 VDC LED lights rated at 1 W each, one red and one white.
I ...
0
votes
2
answers
374
views
How to power a 3V motor with AC?
I want to power a 3 V motor continuously for product demo purposes. Currently, the product is powered by 2 AA batteries. I would like to change the power source so I can plug it into a 120 V wall ...
- 41
0
votes
1
answer
167
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Can I combine batteries and a transformer to power a device at same time? [duplicate]
Particularly i want to buy this smart lock tuya X2 (dont know if exactly the same of the link, just for reference) link and a I want to get the more possible rid of the preoccupation of getting ...
- 11
2
votes
1
answer
35k
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What is this high pitched sound coming from my UPS backup battery?
I own two of these APC Back UPS Pro BX1500M units that were purchased new. Both of these units have always made this very annoying "booo-eeeep!" sound when plugged into the wall. I've owned ...
- 2,885
0
votes
3
answers
1k
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Calculating 12v Battery Ah
Forgive the ignorance here, electricity is a weak point of mine and I'm trying to wrap my head around it all.
I'm trying to find out how many Ah exist in an old lead acid battery. I hooked up an ...
1
vote
1
answer
68
views
Full charged 12V battery with AC converter "empty" within one second - voltage drops, converter beeps
I have the following setup for solar power, which worked well until recently:
solar panel <--> solar charge controller <--> small (car) battery <--> converter: 12V DC to 220V AC <--> my ...
- 131
2
votes
3
answers
568
views
Please help me understand how to add AC power to my DC device
I have a device that runs off of three D batteries. I would like to be able to add a power cord so that I can plug it into the wall and run it off of that instead. I would also like to still be able ...
- 121
0
votes
2
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2k
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Simple circuit to detect ac power loss and use dc backup? [closed]
I want to make a simple circuit like those used in commercial emergency lights.
I would have a "walmart" AC to DC adapter powering say a DC light or two. I would like it so when the AC powering the ...
- 41
0
votes
3
answers
2k
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Can I quickly charge supercapacitors with a power adapter?
I am trying to make a super capacitor bank that I can charge is a couple minutes. It will output a 5V USB charge (aka a power bank.)
My materials: a 15V 8A power adapter, 2 Maxwell 2.7V 3000F ...
1
vote
1
answer
177
views
Can I build a laptop like power supply for my PC with a car battery?
Power outages are quite common here(india) and I want something better than a UPS: I don't wanna shut down the system. I was quiet inspired by Make Your Computer UPS Last for Hours that uses a car ...
- 111
0
votes
1
answer
111
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Laptop powerbank, AC current [closed]
I want to buy a laptop powerbank which output AC current, in which I then plug the stock charger of my laptop.
It it a good idea, or I should rather buy a powerbank that directly output 12v so I can ...
- 111
0
votes
3
answers
1k
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link voltage and link capacitor basics [closed]
I am currently getting into the topic of electric vehicles and I often come across the terms link voltage and link capacitor.
simulate this circuit – Schematic created using CircuitLab
As far ...
- 241
1
vote
2
answers
707
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Converting 28VDC -> 14VDC at around 200A How do you pull that off with that kind of current?
Current boat has 110AC air conditioners and some small appliances but the rest of the systems are on 12VDC. Genset ate a jellyfish and has to be replaced, so I'm working out options to upgrade/change ...
- 437
1
vote
1
answer
9k
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Using an AC Fan on DC Battery
I have a 30wp solar panel which charges a 28amp 12 V dc battery. Can I use an ac fan (with less power) on that battery? I am newbie to electronics.
- 113