Search results

  1. N

    Anyone here ever programmed an FPGA?

    One thing about FPGA development, as with software, is that functions and pre-built libraries are available, sometimes for a price. You don't always have to develop from scratch. Google that part too.
  2. N

    Second-Order Circuits

    So you have the voltage versus current (or vice versa) expressions for each of the components? These interact according to Kirchov's laws? Allowing you to combine them. I guess there is a form of the solution that you can assume is a solution to the resulting differential equation(s) and you can...
  3. N

    Second-Order Circuits

    Seems a workable problem. How far have you got? . I guess they expect you to use techniques you have recently been taught. Are you working in calculus integrals and derivatives versus time, or in s-domain?
  4. N

    Fat laser beams...

    Wow,,don't know what one is, but also not sure where one could legally or safely use such a thing.
  5. N

    Polaroid tv

    Your post seemed to work. I'm rather simple when it comes to site, but I've had little trouble with it. How can we help?
  6. N

    Advice on linear actuators ? Length of strong strokes per second ?

    We've had one for years. About 3m stroke and not sure speed, but maybe several meters per second at full out for short distances. . I guess electric shavers tend to move in near linear motion, probably 50/60 times per second? I guess toothbrushes are usually rotatry.
  7. N

    Power Supply Limits? Do & Don't

    For most things it tends to work like this. Needs to match in voltage. The power supply needs to be able to supply what the device needs or more. The output can be AC or DC - you want to get this matching. A device made to work on one won't like the other. The voltage is important as you...
  8. N

    Looking for help identifying an old Motorola transistor

    Another direction: Plug one into his transistor tester and get an idea of the parameters. Might narrow down the options for it. . Either way, I'd guess you will end up throwing them out, recycling for the gold, or worse, like so many of us, add them to the ever-increasing electronics junk pile...
  9. N

    How to make an hologram

    I've not looked at it, but it was not obvious to me that https://theartofeducation.edu/2018/05/25/a-step-by-step-guide-to-creating-holograms-in-your-classroom/ was actually a hologram rather than a real image. Happy to be wrong. These ones as the most accessible ones always appealed to me...
  10. N

    How to debug this sound COB circuit?

    Not familiar with the edge connections of these units. A slow failure of some buttons first sounds like either (1) switch/button failure (common) (2) Connector failure (also common) . Maybe someone who has used these can help, but likely the buttons connect between the edge connector lines...
  11. N

    Anyone here ever programmed an FPGA?

    If you have a budget: AWS? - instantiate any size machine that you need. :)
  12. N

    Anyone here ever programmed an FPGA?

    VHDL? It's sort of a different way of thinking. Parallelism is up to you. If you want massively parallel, you have to pay for realestate. . Can't picture how frogger fits into it. FPGA's like GPUS are good at simple & pipelined.Sort of depends on which tool you choose. With people selling FPGA...
  13. N

    Wireless switch / outlet ~ RIP

    Zenner diodes are often used to create a particular, controlled voltage drop or threshold. Hence they come in a wide range of "zenner" voltages. For things to go well, you need to get wone of the right voltage.
  14. N

    How to debug this sound COB circuit?

    Speaker? With the circuit turned off; no power applied, and you put the meter on Ohms, and put the probes across hthe speaker, do you hear a click? If so, that confirms the speaker is still there, which is likely. . Switch? You say you can see the 5volts around the circuit when the swicth is...
  15. N

    Comedy Thread

    That's the copy by Rockwell. Has its points, but I think the first was the turbo-encabulator. It's still online somewhere.
  16. N

    spark gap no semi conductor transistor

    . I don't actually know the conditions for an arc to quench. I'd guess some simultaneous combination of voltage and current that means the plasma adequately dissipates. In some breakers, you just blow away the plasma with a blast of air so the conductive path is not there. That mechanism might...
  17. N

    spark gap no semi conductor transistor

    Take a look at how flash tubes work? They can have a trigger electrode. . But, you know, maybe if you put this in an evacuated chamber, tube of some sort, and chose one end to actively promote loss of electrons, maybe control the flow with another electrode... :) . Enjoy
  18. N

    electro static actuator attempt

    Piezo things are often oriented. Even if sometimes you use the field to squish one direction to get an expansion another. . Which direction is the movement here? Of which pieces?
  19. N

    electro static actuator attempt

    So one of these things conducts? And one is piezo-electric?
  20. N

    lego style analogue computer

    Ever looked at fluid logic? Able to make modular pieces that clip together. . Sorry did not follow where you got gain from with the lego. Unless perhaps displacement was the quantity you manipulate. Lego has pneumatics, I guess. Never played with it. As with fluids, you can get gain & such if...
Top