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Q&A

Posts tagged power-supply

Synonyms: power-supplies

4 child tags

Anything related to power-supplies. A power supply is a circuit or a device whose purpose is to provide a continuous supply of energy to a circuit (or, more generally, a load) in a way suitable for supporting and maintaining its operation.

Power supplies draw energy from a power source (e.g. the 240Vac mains line or a solar panel array) and convert it to the specific voltage and current requirements of the load.

There are many different kinds of power supplies, but the most common ones are those that draw power from the AC mains and produce a constant voltage (DC voltage) suitable to power the electronic devices commonly found in a household or in a workplace.

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Q&A Implementing local ground theory on PCB power distribution [closed]

I've tryed to implement a local ground concept told by Olin Latrop here : He have told: (What I've perceived)You should not connect every gnd point instantly to gnd plane, since it can inject HF ...

0 answers  ·  posted 1mo ago by mohammadsdtmnd‭  ·  closed 1mo ago by Olin Lathrop‭

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Q&A Why would a standby UPS fail to power devices when there's no power outage?

I have an ordinary consumer-grade standby UPS with, I believe, ample power for the devices connected to it.[1] It's five years old. For the second time in about a month, I've found my computer po...

4 answers  ·  posted 1mo ago by Monica Cellio‭  ·  last activity 1mo ago by Canina‭

Question power-supply
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Q&A ATX Computer Power Supply Spark in Non-computer Application

Hello! 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. ...

1 answer  ·  posted 7mo ago by Gabriel‭  ·  last activity 7mo ago by DSI‭

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Q&A Why 3.3V instead of 3V?

Usual values used in doing electronics/power supplies are almost always round numbers: 5V 12V 28V 48V 60V I understand that in some cases ICs are built to accept the voltage directly comi...

4 answers  ·  posted 3y ago by 2kind‭  ·  last activity 7mo ago by TonyStewart‭

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Q&A How do "O-ring circuit" differ from an "ORing circuit" or "OR-ing circuit", or are they synonyms? [closed]

I've seen a few different circuits (a) (b) (c) (d) described as "an O-ring circuit" or "an optimal O-ring circuit". What does the "O" and the "ring" refer to in such circuits? How do "O-ring circ...

0 answers  ·  posted 2y ago by DavidCary‭  ·  edited 8mo ago by Lorenzo Donati‭

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Q&A PNP Darlington pair as a current limiter

I am trying to analyse what is controlling the load current in the below Darlington configuration. Is it the base current of transistor Q3 which is controlling current through R14 / emitter curr...

1 answer  ·  posted 2y ago by kadamrohan16‭  ·  edited 8mo ago by Lorenzo Donati‭

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Q&A Design considerations for a synchronous DC/DC converter

In the field of DC/DC conversion, one can build a synchronous DC/DC converter (also referred to as synchronous rectification). This practice involves replacing a diode with a MOSFET switch. As far...

2 answers  ·  posted 3y ago by Mu3‭  ·  edited 8mo ago by Lorenzo Donati‭

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Q&A Low-frequency PWM-controlled Mosfet heater circuit

The circuit above is used to control a 240W ceramic heater by means of a PWM signal at 30Hz, generated by a microcontroller, with 5V logic. The input is a standard 280W AC-DC external power adapt...

2 answers  ·  posted 2y ago by francesco‭  ·  last activity 2y ago by Pete W‭

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Q&A Humming noise from a boost converter's inductor

My step-up converter makes audible noise both with and without a load.I am almost certain it is the inductor, because when I hold my finger on it I can feel vibration and it gets quieter. Unfortuna...

2 answers  ·  posted 3y ago by Kranulis‭  ·  last activity 3y ago by Olin Lathrop‭

Question power-supply
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Q&A Replacement power supply voltage and current ratings?

If the external power supply to a device fails, and I can't get the exact model, what do I need to specify to get the right replacement? I can re-use the old supply's connector, but what about the...

1 answer  ·  posted 4y ago by Olin Lathrop‭  ·  last activity 4y ago by Olin Lathrop‭

Question power-supply