Announcement

Collapse
No announcement yet.

Four quadrant multiplier

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Four quadrant multiplier

    I see X and Y inputs. I wonder if this circuit can be the basis of some crude and simple VDI. Maybe just to give an indication of Ferrous/Non ferrous when in all metal mode. Like a visual two tone.
    Attached Files

  • #2
    Check electronic music circuits to see more approaches to this.

    Comment


    • #3
      If one were to connect x y to the sbg-pid circuit where the discrimination pot connects, for example, then put a comparator on the output of circuit to drive an LED for ferrous Target.
      I wonder if that would work, of course there would need to be some mods to circuit. But as a concept, I wonder.

      Comment


      • #4
        Originally posted by bklein View Post
        Check electronic music circuits to see more approaches to this.
        Y'know, I took a look at your book online and saw some really interesting stuff. So I went looking for a hard copy. Holy Smokes, the going rate is $150 used! Why not throw the thing on Amazon publishing for $30 and make some extra money?

        Comment


        • #5
          Which book? I mean what's the title.

          Comment


          • #6
            Well my gosh, it's "Electronic Music Circuits "
            You should have capitalised. I should have been smarter.

            Comment


            • #7
              Barry, errh, your book is in a PDF available online for free. What's going on here?
              Why don't you take action. That looks like a really well done book.

              Comment


              • #8
                Wow, what a fantastic book. Tonnes of circuits and information. Just browsing through using the online viewer.
                That is a valuable piece of published work.

                Comment


                • #9
                  Now I remember. It was you who wrote on another thread that someone put your book as pdf on some archive site.

                  Comment


                  • #10
                    Took a peek at the book online as well and it reminded me of when I had an ARP Odyssey back in '83 that I bought off my musician roommate. I spent many fun hours playing with that thing.

                    Comment


                    • #11
                      Yeah, the vintage stuff is so cool, and VALUABLE too. Wish I kept my Sony Walkman from 1980.
                      Sony made 200 million Walkmans before stopping production in 2010. But the first ones from the very start are highly collectible. I threw mine out back in the eighties without so much as a sniffle along with a lot of other stuff. Wish I had kept those old vacuum tube amps. I threw them all away because they were almost worthless at the time.

                      Comment


                      • #12
                        Edited

                        Comment


                        • #13
                          Just recently I saw on eBay, a Lafayette stereo tube amplifier which sold for over 1000usd, I used mine as a floor stool to sit on, when I needed tovwirk on stuff low to the ground. Threw it on the dump in 1984. The thing weighed a ton. Thinking it was too heavy to keep moving from apartment to apartment.
                          Misery I tell you.

                          Comment


                          • #14
                            Seriously, if I had kept all the things that I had way back when, I would have been sitting on a throne today.

                            Comment


                            • #15
                              Originally posted by bklein View Post
                              Check electronic music circuits to see more approaches to this.
                              Cool book!
                              I wish i had it few decades earlier...
                              You've been with Music Man!
                              Cool!
                              Part of my hobby was always such stuff.
                              Recently i "messed up" with Moog.
                              What a vintage!
                              Touching those keys... what a feeling!


                              Comment

                              Working...
                              X