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  1. Miguel Lopez

    Help needed about ICL7135 pinout

    Thank you for that info, but I need to say that I never open holes on the PCBs. I have always surface-mounted the components on my PCBs. (See pictures) In the beginning, it was due to the lack of proper drill bits to do it, now I think that it is easier to mount the components on the surface...
  2. Miguel Lopez

    Help needed about ICL7135 pinout

    Thank you very much for your answers. I already had that datasheet from Maxim, but as I have never used SMD, I know nothing about it. There is always a first time for everything, so I think time has come. I will prepare a small PCB for experimentation. I will let you know results. Thanks
  3. Miguel Lopez

    Help needed about ICL7135 pinout

    Hello A friend of mine gave several MAXIM ICL7135cqi chips. I would like to experiment with these chips as they could be useful to build a good digital bench multimeter. The datasheets that I have found on the web, show the pinout of the dual in line package. but the ones that I have are of the...
  4. Miguel Lopez

    Weapon worries...

    Have to say that the forum is not based here..................my word.:p
  5. Miguel Lopez

    Building my own bench drill

    We have a lot of sand, maybe more than the rest of the world. Just pay a visit to Varadero beach and you will understand what I'm talking about. There is a lot of compressed air too. In the garages to inflate the tyres of the vehicles. Can't see the relation. Yes, our electric grid is nothing...
  6. Miguel Lopez

    Building my own bench drill

    I don't think that such option could be available here. I will ask anyway.
  7. Miguel Lopez

    Building my own bench drill

    Saddly not. I will solve it with wire brush and sand paper Sure. The drill of my old man is placed above a wooden bench, but the bench that I have lacks the words "properly made". I don't have wood, but I have metal, so, my solution will not be a wooden one.
  8. Miguel Lopez

    Building my own bench drill

    Mr Time has been implacable with me, but I have found the way to work on this project. This weekend I finally assembled it. Althought I want to improve it with some turnery pieces, it works how it is. Of course it need painting, and I promise ti paint it before put in service. First I have to...
  9. Miguel Lopez

    Capacitor Explosions

    Do it when your wife isn't at home, or she will pull your ears (or something else) due to the debris and the fumes all around the place. Clean everything before she gets back, and blame the neighborg for the bad smell. It has worked for me.
  10. Miguel Lopez

    Yu Fong YF-600 schematic

    Thank you very much
  11. Miguel Lopez

    Yu Fong YF-600 schematic

    I did it, but as I told you, that is not the one I'm looking for. I'm after the YF-600 which looks like this:
  12. Miguel Lopez

    Yu Fong YF-600 schematic

    Thanks Harald. I'm a member of RadioMuseum too, but I have not found the YF-600 there.
  13. Miguel Lopez

    Yu Fong YF-600 schematic

    Hello I'm searching for the schematic of the Yu Fong TF-600 clamp meter. I have fixed one of them and I want to adjust it. In order to move the right potentiometers I need the schematic. I just have found this page...
  14. Miguel Lopez

    Book Reviews

    There are a lot of good reading at archive.org. Both in vacuum and SS electronics. http://archive.org/search.php?query=electronics%20AND%20collection%3Aopensource There a lot of oldies but goldies
  15. Miguel Lopez

    How do constant current loads work and how to make one

    I can do it cheaper. Of course, my own specs :D
  16. Miguel Lopez

    How do constant current loads work and how to make one

    Depending on the value of constant current that you need, the LM317 is always a good choice (at least to me) http://www.bristolwatch.com/ccs/LM317.htm
  17. Miguel Lopez

    Building my own bench drill

    Oil, grease, paint,...everything is scarse here. Rust is not. But that is not the reason. The drill has grease and oil in the vital parts. Most materials used here are retrieved from unused things, very oftenly from dumped things, so they are rusted. That is not the reason neither. Rust is...
  18. Miguel Lopez

    Building my own bench drill

    This is a picture of the drill that my old man build in the 70s. I'm using this one to build the other, both as tool and as model.
  19. Miguel Lopez

    Building my own bench drill

    Sorry, a bit delayed but this is what I was talking about. Now it is a single sliding piece welded to the C-beams, and it does not need alignment. And now this is how it is till now. The drill fully down. The drill fully up
  20. Miguel Lopez

    Building my own bench drill

    I'm agree
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