Got a Technical Question?

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Ask Technical Questions Here ( research them first, if Google answers it, use Google, Not Us )

You may get an answer, you may not. Please Date Your question. Put the most recent questions at the top of the question list. Put plenty of detail in the question. Your problem may be clear to you, but not so to the rest of us.


Question 4


Date: 2009-10-08

Does anyone have a simple circuit for Power over Ethernet (PoE) power supply? I have found a number of ICs that are supposed to help (e.g. MAX5940 .. MAX5943, LTC4257, TPS23750, ...) but most of the example circuits suggest output transformer and optocouplers. That would make my ~$20 design too complex and expensive. Do you know of any cheap and easy way to get 5V or 3.3V from PoE? Thanks!


Question 3


I am looking for a CEF04N6 transistor for an Acer monitor. China wants to sell me 2 at $10 each plus $50 shipping. The monitor isn't worth more than $100. Please advise. Date: 6/23/08


Aww really? thats just a cheap MOSFET. Go buy something that is 600v 6a rated and drop it in! Any mosfet will work. the pins should be GDS.

Question 2


hello i am looking for a inline and paralel messuring tools ,and was wondering if i can do it with a gyroscoop Date:23-2-2008 more or less


Could you clarify the question a bit? What specifically are you trying to do?

Question 1

how do I add my c code to this wiki?

Feb '08: how do I add my c code so it will be colored in this wiki? I can have it export to a html file and rtf


Currently the fastest way to add c code to the Open Circuits wiki is to copy and paste the plain text, then add a "code" tag before and after the code. Like so:

#include <stdio.h>
int main(void){
    printf( "%s", "Hello, world." );

We can also discuss the main() function.

(hit the "edit" button to see how that is done). Is that what you wanted?

Many IDEs colorize C code; that makes it a little easier to understand. If you want to see those pretty colors, some options we've seen so far:

  • copy-and-paste the source into your favorite IDE. Then it will colorize the code in the way you are used to (which may be different colors than what people with a different favorite IDE see).
  • Perhaps you could try exporting HTML from your IDE (or some other off line colorizer tool or script) and pasting it in. The OpenCircuits wiki accepts some html.
  • Other wiki use a "source" tag that colorizes C code automatically[1]. Should we install that here at Open Circuits?

russ_hensel, --DavidCary 12:51, 20 March 2009 (UTC)

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