Tagged Questions
-1
votes
0answers
25 views
Is there a transformer that could replace the component: Conrad Electronics type 516260-62?
I am a doctorate student working on a waveform generator unit similar to the TENS and Microcurrent devices that were discussed in the following forum:
For a nerve-teste circuit, what causes the ...
1
vote
1answer
60 views
Live-Neutral transformer fault
In this critique of an ELV PSU design, it is suggested that a "Live-Neutral" fault could result in a fault current of thousands of amps. I'm sceptical. Please could someone explain how this could be? ...
3
votes
3answers
155 views
Building a power supply, want to stay alive
I am building a power supply for a very old laptop. The circuit uses a transformer (220 V primary to 15 V secondary, 33 VA) and that worries me a little. (Please note that I an enthusiast and so far I ...
0
votes
2answers
536 views
Dual polarity power supply for project, possible choices?
For a variable power supply I require 15V to get ~0-12V, and +/-15V for an op amp as part of the project requirements, also negative rail in the future.
Two plugpacks (isolated, 15/0/-15)to me seems ...
13
votes
3answers
3k views
How is using a transformer for isolation safer than just playing with it?
How is using a 1:1 transformer safer than using the mains straight off? Is it because you can limit the current coming from the transformer whereas straight from the mains its not current limited? I ...
3
votes
2answers
205 views
How to properly isolate multiple power supplies
Say you have a single 110V AC supply and need to use it for a number of devices, each requiring very different characterists. For me personally these are: a direct use of the 110V AC supply for a ...
4
votes
3answers
798 views
Why is power supply from electrical utility referenced to earth?
In response to the question Basic Training for working with 120V AC zebonaut had replied that "A regular wall outlet is referenced to earth" and this provides the close loop for the circuit to ...
