rq3's latest activity

  • rq3
    rq3 replied to the thread Are Rev-Ed & Picaxe missing out??.
    @Rampz, I believe I have the same issue. I'm a retired analog electrical engineer. I can deal with Smith charts, and impedance matching...
  • rq3
    rq3 replied to the thread Tick Tock timing application.
    Very nice! I was shocked what a difference it made adhering a mass to the piezo disc. And it certainly sounds like your clock is "in...
  • rq3
    rq3 replied to the thread Tick Tock timing application.
    You are over thinking this. A piezo disc will output over 90 volts if tapped directly. No amplication is required, indeed, you need to...
  • rq3
    rq3 reacted to JPB33's post in the thread Tick Tock timing application with Like Like.
    Interesting stuff! If you adjusting the beat its important that you try it with a minium swing, ie so that its just going through the...
  • rq3
    rq3 replied to the thread Tick Tock timing application.
    Phil, you stole that clock! It's a beauty. Assuming its clean and properly lubricated, level the clock with good bubble level so that...
  • rq3
    rq3 replied to the thread Tick Tock timing application.
    A grinding wheel will put a small flat spot on a bearing ball in short order, unless it's tungsten carbide or similar. The clock in the...
  • rq3
    rq3 replied to the thread Tick Tock timing application.
    A 1/2 inch diameter steel bearing ball, with a flat spot for glue, works just as well. For glue, I use a high temperature epoxy called...
  • rq3
    rq3 replied to the thread Tick Tock timing application.
    Attached is a very brief video of one of my "TAP" sensors resting against the face of one of my clocks. It detects the escapement quite...
  • rq3
    rq3 replied to the thread Tick Tock timing application.
    I think I may have exactly what you need. It's a piezo sensor used to detect the contact of a 3D printer nozzle with its printing bed...
  • rq3
    rq3 replied to the thread Compact Date Storage & Retrieval.
    I have a 48 year old HP-35 calculator that still works! As does my HP-67, after replacing its mag card drive rollers. But my 63 year old...
  • rq3
    rq3 replied to the thread Hippy status, rev 2.0.
    hippy, hippy, hooray!!! It's very good to see you here, and I'm going to take it as an indication that this planet is getting back to...
  • rq3
    rq3 reacted to hippy's post in the thread Hippy status, rev 2.0 with Like Like.
    Hi folks - I'm back ! Thanks for all your expressions of concern and appreciations. And apologies for my long absence. Due to the way...
  • rq3
    rq3 replied to the thread closed loop DC motor speed control.
    This is a superlative idea! And should cost about $20 to implement. The projector mechanism should take the exact same number of motor...
  • rq3
    rq3 reacted to inglewoodpete's post in the thread closed loop DC motor speed control with Like Like.
    I'm not sure why a stepper motor has not been mentioned in this thread yet. Surely with just a PICAXE at the helm, it would be easy to...
  • rq3
    rq3 replied to the thread closed loop DC motor speed control.
    What you are describing is what used to be called a telecine ( pronounced telasinee). Unless there is an optical audio track involved...
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