Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Recent content by galveston

  1. G

    Help with square wave generator

    I have discovered that by hooking 2 electrodes in series, I can reduce the amps draw drastically and at the same time increase the sq, in of plate surface. Do you think this is the right direction? To use as large a surface as possible?
  2. G

    Help with square wave generator

    Well, all that doesn't sound too promising. Do you know of a better way to deliver more watts to the electrode? Everything I'm reading indicates a pulse wave generator, but all the mosfets seem really wimpy. I can use direct constant current and get a lot of gas, but that also causes a lot of...
  3. G

    Help with square wave generator

    Thanks again. Now another question. If I use a IRF3704 (20V 77A supposed to give 87W) but I don't understand this, as V times A equals W. Can you explain this? Also, this is an N channel MOSFET. Can that interchange directly with a P channel? I have 225 sq. in of .040 gap and want to apply...
  4. G

    Help with square wave generator

    OK. So far, so good. I'm learning slowly. More questions follow. i've learned that an IRF540 delivers 10A. Queston: If two of these are hooked in paralell, does that deliver 20A to the load?
  5. G

    Help with square wave generator

    Thanks for all the answers. I have been doing more reading. I read that Myers had good results using very low amps, and apparently higher voltage. So now I am wondering about using a sq wave signal to operate a flyback converter instead of a FET. Couldn't the voltage be raised and thus the amps...
  6. G

    Help with square wave generator

    I still need a techinical name for the component shown as the triangle on the right side of the above schematic. Thanks again
  7. G

    Help with square wave generator

    So are you saying that the component on the right in the schematic (the triangle) is a schmitt trigger? That is what the people at the supply house couldn't identify. And I think a max draw of 25A from the battery source would be ok. Not sure how this relates to amps in the electrode?
  8. G

    Help with square wave generator

    OK. So if I want say 20K frequency, what would "C" and "R" be? +B would have to be 12V DC, right? And I'm still foggy as to what I ask for to get the 8 pin component. I'm getting there. Thanks for being so patient. Edit: I have another question while we are at it. What determines the N ampres?
  9. G

    Help with square wave generator

    Thanks, I got the schematic, but still have a few questions. The people at the only supply house near here seem to need numbers to know what I want. What do I ask to get these: 1. The item labeled 1458 (or is that a generic that I can use)? 2. The 8 pin mosfet (?) 3. The value for capacitor "C"...
  10. G

    Help with square wave generator

    I want to build a HHO generator, and need a square wave generator to operate the electrodes. The wave generator will run on 12V DC, and I would like to have an output of 12V and up to 25 Amps. A control to vary the on/off time of the wave would be nice too. A schematic with valid part numbers...

Part and Inventory Search

Back
Top