Master Power Switch for 3 Circuits?

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Discussion Overview

The discussion revolves around creating a master power switch for three separate LED circuits powered by individual USB sources. Participants explore the feasibility of connecting these circuits in parallel and the potential implications for the USB ports.

Discussion Character

  • Debate/contested
  • Technical explanation

Main Points Raised

  • One participant inquires about the method to create a master power switch for three LED circuits and whether connecting them in parallel could damage USB ports.
  • Another participant suggests using a 3 pole, 3 position ceramic rotary switch as a potential solution for the master power switch.
  • A different participant criticizes the initial description as insufficient for providing useful suggestions, emphasizing the need for a clearer visualization of the modification plans, such as a block diagram.
  • In response to the critique, one participant asserts that the information provided is adequate and dismisses the need for further clarification.
  • Another participant makes a humorous remark questioning the relevance of resistance in the context of the discussion.
  • A later reply expresses frustration with the argumentative tone of the responses received, questioning the value of forum discussions.

Areas of Agreement / Disagreement

Participants exhibit disagreement regarding the sufficiency of the initial information provided and the appropriateness of the responses. There is no consensus on the best approach to the problem or the necessity of additional details.

Contextual Notes

The discussion lacks a clear technical specification or diagram of the proposed modification, which may hinder the ability of participants to provide targeted advice. The implications of connecting circuits in parallel and the specific characteristics of the USB power sources are not fully explored.

WeAreBorrg
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Hello all,
Long story short:

I'm modding a Netbook PC; I'm powering three different sets of LEDs from three separate USB power sources.

1. How can I create one master power switch for all three circuits?
2. Would hooking all three circuits up to one switch in parallel burnout my USB ports?

I appreciate any and all constructive commentary.

Also, I understand that your time is valuable and if don't want to be bothered to explain the answer I would be more than happy to receive a very brief answer which would point me in the right direction for my own research.

Thank you in advance.
 
Last edited:
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*...cricket...cricket...

Unless someone can think of something better, I guess I will just have to use a 3 pole, 3 position ceramic rotary switch as a master power switch for all three circuits...
 
"Long story short" is not sufficient for others to make any useful suggestions. It is not possible (for me, anyway) from your verbal description to visualize exactly what “modding” you are trying to accomplish. You’ve not provided a simple basic block diagram of your planned modification specifications, so members here can only guess and or speculate about your plans. Per your request, I'll try to point you in a direction where you may expect to find some useful suggestions. Google is your friend. Using the search terms “digital control of multiple power mosfets” there are lots of examples of circuits that do similar operations that you’re asking about. For instance, here’s just one:
http://www.ti.com/lit/an/slvu171/slvu171.pdf
 
You should not need any more info than I have given you. If the info provided is too abstract and not sufficient for you then clearly you cannot be of use.
 
Is "resistance futile" as well?
 
Thanks for the defacto useless argumentative forum response. And who says forums are a complete waste of time?
 

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