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13 votes

Does a power supply wear out?

Yes, power supplies do wear out. For example LED lamps may start blinking or don't light up because their power supply is not working any more. Components such as electrolytic caps will degrade over ...
Justme's user avatar
  • 159k
13 votes

Is this circuit safe to put in my ceiling? What improvements could I make?

Definitely not safe by any metric. There is no fuse or other manufacturer suggested mains voltage protection circuits befoe the mains supplies. The outputs of the supplies are shorted together without ...
Justme's user avatar
  • 159k
8 votes
Accepted

Does a power supply wear out?

Essentially all electronics have a limited lifetime. The manufacturer specifies conditions for use of the electronics – for power supplies, these are, for example, input voltage (and frequency of AC ...
jwo's user avatar
  • 102
3 votes
Accepted

Matching power supply to a four pin connector

You’ve got a supply with positive and negative and remote voltage sense capability. The connector has four pins, so you could either connect two pins to positive and two to negative to double the ...
GodJihyo's user avatar
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2 votes
Accepted

Decoupling capacitor for drone power supply

The capacitor does not "handle rapid voltage changes". What it does do is handle rapid current changes and prevent them from becoming voltage changes. In order to pick a value, you need to ...
Dave Tweed's user avatar
  • 175k
1 vote

Is this circuit safe to put in my ceiling? What improvements could I make?

Finding a 600mA (or more) 5V supply with battery backup that can be safely and legally placed elsewhere in the ceiling or walls should be easy from generally trusted suppliers like Eaton or GE. Then ...
jb_dk's user avatar
  • 11
1 vote

How to correctly indicate reponse time of a power supply

Well, no idea, you don't describe your system at all -- but there are a few typical cases, and one might argue anything else is pathological and would indicate bad design of the system, anyway. ...
Tim Williams's user avatar
  • 39.5k
1 vote

How to correctly indicate reponse time of a power supply

Does the voltage drop happen exactly at the time that the current draw is being increased? Yes, but capacitance and inductance can make slight delays from the source to the load. In most power ...
Voltage Spike's user avatar
  • 84.8k
1 vote

Power supply delivering more voltage than indicated even when loaded

It depends on the type of power supply. For example, an unregulated full-wave bridge supply with capacitor filtering,such as this, will charge the capacitor to 1.414 times the root-mean-square (RMS) ...
DrMoishe Pippik's user avatar
1 vote

Power supply delivering more voltage than indicated even when loaded

The most unexciting answer is that it's perfectly normal for a good old unregulated transformer supply. None of this fancy regulated linear supply or newfangled switch mode supply stuff we have these ...
Justme's user avatar
  • 159k
1 vote
Accepted

Usage of two PSU in parallel for WiFi router using Schottky diodes

What you measure is perfectly normal. While Schottky diodes have less forward voltage drop than a standard diode, they leak current in reverse much more than a standard diode, which is what you ...
Justme's user avatar
  • 159k

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