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  1. CDRIVE

    Identify base, collector, and emitter of transistor

    When I first began working at the hospital that I've mentioned before I was using a DMM that had the (+) (-) jacks reversed when in "R" & Diode Check mode! :eek: I Sharpy marked a warning on the rubber case. Chris
  2. CDRIVE

    Identify base, collector, and emitter of transistor

    Think about what a fun uC project this would make. Imagine it cycling through the pinouts using safe current and voltage limiting. Then outputting the data to an LCD along with serial interface to a PC to create a log file. Chris
  3. CDRIVE

    LM339 Low voltage alarm help

    Hello Joe and welcome to EP! That simple circuit already has an LED indicator. The LM339 has open collector outputs with a maximum current sink = 18mA. We need to know how much current you'll be pulling from the battery. This way we can determine the most efficient interface, whether it be a...
  4. CDRIVE

    Interchanging Triacs

    Marty, we have a thread in the lounge that discusses the art of sarcasm. In that topic I stated there's a significant difference between sarcasm and simply being obnoxious. I don't think it's something you should aspire to emulate. Chris
  5. CDRIVE

    Identify base, collector, and emitter of transistor

    Yeah, the fact that the probes incite the little bugger to do back flips and dance around your bench top doesn't help. Oxidation, oils, etc on the probes or transistor leads don't help when measuring the minute voltage differences indicated in the link. Alligator jumpers introduce their own...
  6. CDRIVE

    Interchanging Triacs

    I'll interpret that as a no. Perhaps the mods will move the topic to a more appropriate section. Best of luck, Chris
  7. CDRIVE

    cant find the tranfer function of 2nd order lpf

    ikhsanrino, welcome to Electronics Point! I don't know what link you found but I think you'll really like this one! http://www.ti.com/lit/an/sloa049b/sloa049b.pdf Chris
  8. CDRIVE

    Identify base, collector, and emitter of transistor

    We really do need our own tutorials. This is the second time this week that we had to post a link (OpAmp) to AC. It really sucks having to send new members there. :( On another note nubes are fortunate that they were born in a era that Germaniums are just history. The tests in that link would...
  9. CDRIVE

    Router Connection

    Mike, Welcome to Electronics Point! I was surprised that Hop answered you with a single paragraph. He's our resident word meister. He actually managed to answer your question without providing the complete history of the Electromechanical Relay.:D He's been known to literally melt keyboards...
  10. CDRIVE

    Interchanging Triacs

    Is there a logical reason for posting this in the uC section? Chris
  11. CDRIVE

    Opamp help

    I guess my point is we never know what new member might someday be an EP shining star. So we should be glad when they decide to check here first. We have more than enough collective brain power to help them without directly doing their homework. After all, many of us may deny this but reality...
  12. CDRIVE

    help with voltage reducing, then amplification

    Damn! I'm glad I didn't say it! :p Anything else? Feeling lucky? Go ahead! Make my day! :D BTW, Briggs didn't! Chris
  13. CDRIVE

    Randomizer help

    This is a really low grade (musings) solution but an exceedingly unstable osc. should work. I built quite a few of those! :p BTW, I love your Big Boy! It was the Alpha Male fire breathing Dragon of the rails! Chris
  14. CDRIVE

    help with voltage reducing, then amplification

    From now on I'm going call you Harry Callahan! :p Chris
  15. CDRIVE

    help with voltage reducing, then amplification

    Hop, I love reading your stuff. As stuff goes you have a lot of it and it's always interesting! :) Chris
  16. CDRIVE

    Opamp help

    It's possible that he did and fortunately got a hit on EP. :) Chris
  17. CDRIVE

    EEG circuit - need help please!

    Of all the good circuit sites available it amazes me how many people get sucked into the black hole called Instructables. It's not an electronics site and its 'how to's' are poorly screened, if at all! Chris
  18. CDRIVE

    Without resistors

    Trevor, thanks for the T.O.O. Seems like the OP's image is a crap shoot design. Chris
  19. CDRIVE

    am I mean????

    Sarcasm is an art. It fits well on some and not so much on others. This is because it takes great skill. To do it well is to insult someone while still having them like you. Being obnoxious does not require skill. James Garner took it to a whole new level in his role as Jim Rockford. The...
  20. CDRIVE

    Without resistors

    Why PNPs? High power NPN's are far more common. No Base - Emitter Caps either. How does it oscillate without them? o_O Chris
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