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  1. hevans1944

    The Adventure Continues......

    Gotta wonder whut all these doobies do... I own the FX66 Flashback Fuzz shown in the upper right of the first row.
  2. hevans1944

    The Adventure Continues......

    I have just recently (this week) inherited an electric guitar, a Fender Starcaster, previously owned by a now-adult grandchild of my current wife, and before that, one of her sons. Or maybe it was passed on by my deceased brother through his niece, my youngest adult daughter. Whatever... It will...
  3. hevans1944

    Using a Varistor to solve a back EMF problem

    It is possible that, knowing the diode characteristic parameters of the 1N3210 (datasheet), you could use a parametric search engine such as this one on DigiKey to find a suitable equivalent. If you use Google to find the 1N3210 on DigiKey, the splash page gives the important diode...
  4. hevans1944

    Diode Help

    Could the diode and the board it was mounted on have come from this ancient Panasonic game console? I DID NOT say it was a 1N97. I DID NOT say you are "good to go with the 1N97." What I DID say was you needed to perform some tests, presumably on the "good" diode that you removed from another...
  5. hevans1944

    Diode Help

    If the white and violet color bands mean anything (white=9, violet=7), this could be a 1N97 "gold bonded" germanium diode. Although it appears to be intact, check it out for electrical functionality using the diode function of your multi-meter. No diode function? Then use an ohmmeter and check...
  6. hevans1944

    Easy Wiring Question

    It would help us to help you if you were to up-load two snapshots showing the four terminals on the two switches: one picture for the push-button switch used to ring the doorbell, and the other picture for (presumably) the toggle switch used to turn the porch light on and off. Perhaps with the...
  7. hevans1944

    Illuminated Sign

    @dsjonesuk: ElectronicsPoint is oriented towards Do It Yourself (DIY) electronics experiences. We seldom (if ever) veer off into the commercial realm. There are plenty of individuals, and perhaps even companies, that can design and build a chaser circuit but you won't find them here. Make Google...
  8. hevans1944

    Illuminated Sign

    It appears that someone has already tried to make some "improvements" over the original three AA cell arrangement. The battery compartment is trashed, spring contacts corroded, some terminals missing, wires disconnected, etc. Did you retrieve this sign from a landfill, or perform the...
  9. hevans1944

    Can I mix 3 different brands of electrolytic capacitors?

    If it is possible to do so, it is a good idea to check the electrolytic capacitors for leakage current at their operating voltage and to test them for their Effective Series Resistance (ESR) over the range of frequencies each is expected to "filter" or otherwise pass through a signal. ESR...
  10. hevans1944

    Electrolysis hho generator

    HHO appears to be woo-woo shorthand for an unseparated mixture of hydrogen and oxygen gasses produced simultaneously from the electrolysis of water. Also called "Brown's Gas" and "Knallgas" or "bang-gas". By whatever name the mixture of H2 and O2 (typically created by the electrolysis of water)...
  11. hevans1944

    Ring Doorbell

    @Demonjrw: The thread starter, @muzzzzy joined EP on Nov 2, 2016, made three posts the same date, and has not appeared here since. This was a drive-by poster looking only for a quick answer, not a dialog. If you are having a similar problem installing a Ring video doorbell, please create another...
  12. hevans1944

    My electronics workshop

    I think it looks very nicely stocked and organized. All that is missing is a project. What are you planning to DO in your spiffy new electronics workshop? Be sure you have a bench brush and a waste container available to keep things clean and orderly as you work.
  13. hevans1944

    I think I'm starting a collection

    I am so envious! Did the L&N Type K-4 Potentiometer come with a working standard cell?
  14. hevans1944

    welding pit

    Yes, of course you are right. And if we DON'T ask, it could be they won't tell us... ever. A few years ago the surface engineering laboratory in which I worked was applying a micrometer-thin film of a proprietary coating to the core pins of injection molding dies used to manufacture automobile...
  15. hevans1944

    welding pit

    What!? Are you kidding? They NEVER tell us what they want to DO without at least twenty or fifty posts, none of which are relevant to what the OP is trying to DO. It's like they have been sworn to secrecy, or are afraid someone will steal their "Big Idea" before they can make big bux making and...
  16. hevans1944

    Quick n Dirty answer needed

    It was all I could do to restrain myself from commenting on that HORRIBLE video. The assembly techniques were bad enough, but perhaps excusable in the interest of minimizing the time required to get something... anything... more or less working so a video could be made. What cannot be excused is...
  17. hevans1944

    Quick n Dirty answer needed

    Why don't you try firing up the #2 puppy with a 9V battery and see what happens?
  18. hevans1944

    What is a jumper cap and when do I use them?

    Often the terminal posts these shorting blocks are connected to are also test points. Leaving the top open for probing is a convenience. One very common application was using shorting caps to configure external disk drives as primary or slave drives, but this doesn't require access to the...
  19. hevans1944

    How to create an equation to solve for resistance in this circuit

    Let us know if you need any help expanding from a single-digit display to four digits. Counting the (optional) decimal point, each 7-segment display requires eight bits, so adding three more digits increases the number of bits to thirty-two. This is about where you need to start thinking about...
  20. hevans1944

    Need inductive loop/clamp for A0 input to measure -30 to 80 amps dc

    Hall-effect sensors have been around for a long time, since 1879 when Edwin Hall discovered them. Putting a Hall-effect device to practical use is another matter. The devices are temperature sensitive, the Hall-effect is weak, and output offset, as a result of other magnetic fields, including...
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