Search results

  1. ratstar

    Anyone here ever programmed an FPGA?

    I've been doing GPU's for ages now, and I need to move onto something more mature. I'm wondering if FPGA's will make my robots run better than my GPU ones. What I need (even tho its slightly metaphorical) is to simply run something like frogger as many times as I can at once, I need to...
  2. ratstar

    Mini hi voltage generator dc input or ac input?

    Is this thing dc input or ac input...
  3. ratstar

    spark gap no semi conductor transistor

    So I just thought of the fact that spark gap oscillators dump the whole capacitor only when the very tip of the capacitor has exceeded the voltage distance, and then the rest of the capacitor follows suit. So doesnt that mean u could initiate a collecter and emitter with a high voltage base...
  4. ratstar

    lego style analogue computer

    I wonder if you can make an analogue computer out of a lego type building system. You have a unit, that can be an adder or a subtractor or multiplier or divider, and some boolean logic, and maybe amplifiers, and then u plug these together, and set what their operation is, and the chain of lego...
  5. ratstar

    electro static actuator attempt

    I'm going to 3d print it, so its perfect, but its such a simple thing I probably could fold and glue it out of plastic as well. The arrows are how you assemble the concentric squares to the bottom rail where its move apon, and a plug at the top to stop them falling out upwards. its diagonally...
  6. ratstar

    3d printing a growing crystal

    I wonder you can actually 3d print a growing crystal into a mould, by raising the water level of the precipitating (growing solution) a little each time, and you keep refreshing the solution each time it is "out of precipitation potential". You should as I expect get artifacts at the stepping...
  7. ratstar

    Activating Carbon for conductivity.

    I put on my stove top a potatos worth of potato slices and chunks, and emmersed it in the flame for about 3 hours, I took it off too early, got 0 conductance, so I put it in a metal wire seive, and then I cooked it a bit more, got it glowing, but I fricken burnt myself on the finger, so best be...
  8. ratstar

    piezo-electric pump for mini hydraulic robot

    One of these little micro-pumps would be great for a miniature hydraulic robot, with electrical actuation of its actuators. My system is doing that except, I'm making my own electrostatic version, they operate at 10 kilohertz but they only have a micrometre stroke. So if you multiply 0.0001 by...
  9. ratstar

    static electricity generators

    This video has some cool static electricity generators. But I'm not quite sure how to put them together myself, I'm not sure about what materials to use, but especially I don't know how to connect the anode and cathode. Any help from anyone would be gratefully appreciated.
  10. ratstar

    The 2 capacitor paradox

    I just tried it out, i used 28.9 volts, and ended up with 11 volts on each cap. I tried it with a resistor and it was the same just took more time. It was enough for a strong blip from both capacitors. I got 25% loss each time. (add 11 and 11, you get 22.) so its 25% loss on starting...
  11. ratstar

    analogue pong circuit I found on the internet

    https://kaput.retroarchive.org/pong.html Heres a video of the guy running his machine. This is really cool, could some of you guys finish one of these? As I slowly get more finished with my work, I might have an analogue pong circuit of my own as a side effect halfway through as soon as I...
  12. ratstar

    I cant find where to buy spark gap "circuit interrupters"

    Maybe my laptop is too slow, or I'm hopeless at the internet, but I cant find anywhere to buy spark gaps for doing clocked logic with, I'd like something that just has a negative and a positive and a gap of air in the middle, with very little capacitance. I do have a cool way of making them...
  13. ratstar

    how much voltage can a vacuum capacitor suck up

    sorry stupid post. delete plz.
  14. ratstar

    Novel voltage doubler circuit need help plz

    I've been working on my own design of voltage doublers/multipliers. The circuit here is a times 2, but you can add more caps to it easy enough for more voltage. The idea for how it works is the capacitors are charged in sequence by the DC power supply, the first capacitor is shorted to...
  15. ratstar

    cap self discharge

    Ok. So myth busters time. When people show cap self discharge, you may get a mental picture like this. The blue circuit, is it false or factual - it means the energy has bypassed the circuit to the other side of the capacitor without touching the circuit - or does self discharge mean the...
  16. ratstar

    Will a voltage divider waste power?

    just use a voltage divider, or a current divider. voltage dividers are better cause they dont waste electricity, but current dividers do. or... just use a resistor...
  17. ratstar

    What causes more energy loss out of an LED or a SPARK gap

    I know it depends, but im asking a general sorta newbie question so please be gentle... The same thing is a plasma speaker versus a mechanical speaker - versus a piezoelectric?
  18. ratstar

    Woo-Woo passive amplification using an lc oscillator

    So if you set up an lc oscillator with a side route, and a capacitor with a diode, you will collect the compressions, and u should end up with more than 100% after the osc has settled! what do u think?
  19. ratstar

    plasma display

    Has anyone ever seen someone making a display out of spark gaps? It would be similar voltage to a neon bulb no? Would be quite spectacular.
  20. ratstar

    Why is it PNP instead of PPN for transistors

    If you list emitter base collector in that order, its actually a PPN transistor, not a PNP transistor. You list it emitter collector base, for PNP. and thats not how I like looking at transistors. So this is right, right? That confused me for a while, because look at this t00t from...
Top