Questions tagged [ac-dc]
Questions regarding the safe and effecient design and implementation of AC voltage to DC voltage supplies. Typically Mains to some lower DC voltage.
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UL ratings and power supplies (DC transformer)
I read somewhere that if you sell a product that you plan to be UL certified, this means its power supply must be UL certified as well.
This means that if you supply power via a transformer (external ...
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ATX Computer Power Supply Spark in Non-computer Application [closed]
I would like to ask for your assistance with using a Silverstone DA1650 Gold computer power supply (you can find more about it here: Silverstone DA1650 Gold) for a non-computer application. In this ...
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Safely run a pump using the driver/controller built into an air conditioner - switch EMC motor for a pump motor
I am attempting to switch an ultra-efficient household air conditioner from air cooled to liquid cooled. The unit, (LG DUALCOOL with Watt Control-Eco - T06EV4), was attractive because it has 3 power ...
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AC adapter interfering with WS2812B LED strip
I have 2 power adaptors connected on same AC line, both grounded.
Power adapter 1:
12V DC 10 A for powering 12 V LED strips, controlled by ESP8266, IRLZ44N MOSFET used to control brightness of the LED ...
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Is an AC/DC converter with no visible fuse before the transformer inherently dangerous?
I've been using a generic, unregulated mains AC/DC converter (wall-wart) for a very low-power project. It's output was a bit prone to 50 Hz ripple, so I opened it up to investigate how the circuit ...
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DC appliances running on AC system [duplicate]
How do DC ran appliances work in an AC electrical system? For example, a house runs on AC, but the microwave runs on DC. How exactly is AC converted to DC? Does that DC power then have to invert back ...
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Is there any benefit to converting from single to 3 phase AC before a DC conversion?
Compared to single phase, 3 phase AC produces less ripple in the resulting DC waveform when rectified. At the capacitor filtering stage, it is much cleaner with less sag than filtered DC converted ...
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Trying to fix a mess with DC Power supply
I am not even close to know what I am doing with the electricity, but I have a power supply of my 8 cameras that is gone bad and I think I can manage to replace it myself, but there is a big BUT here. ...
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Should consumer electronics have low voltage isolation?
I am making a MCU (PIC12) controlled 230V relay system. They will be operated from 230V mains. Should I use isolation (1:1 transformer?). I would use this converter for 230VAC-5VDC (or something like ...
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AC-DC Schematic - Is this a Death Capacitor [closed]
Is this a death cap? I think it's not a death cap because it doesn't connect to the DC ground, but I'm not 100% sure.
Image Source: Hi-Link HLK-20M24 Datasheet - https://www.rhydolabz.com/documents/...
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Why aren't I getting a voltage reading from my AC/DC power adapter
I am new to electrical engineering.
I cut the barrel jack off the end of a 24V DC power adapter, exposing a red and white wire. I'm trying to determine the polarity of the red and white wires with a ...
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Non Fused AC Rated Disconnect Switche for DC System
I have 110VDC supplied by a controller to power a actuator/motor located in a hazardous C1D1 environment. I wish to install a disconnect downstream of the controller in the hazardous location so the ...
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Predicting health of power supplies
I have a couple of 12 V, 1200 mA wall mount power supplies.
Currently, using a digital multi-meter, I am able to measure good voltage and amps coming out of some power supplies.
Since these are ...
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Why do photodiode transimpedance amplifiers care about signal frequency?
I'm designing a circuit to amplify low light levels (in the range of 0.1 uW) of measured black body radiation for application in a pyrometer. I don't have much experience with this kind of stuff so I'...
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What fire tests are done on power adapters/chargers?
I was curious about the fire risks in using a typical AC-to-DC wall adapter
(e.g., this)
and went to the UL website
to learn what exact tests were done to get the "UL LISTED" stamp,
but I ...
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