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  1. ratstar

    Why a pull down resistor for transistor base

    Got another piece of useless trivia, a pull up resistor can be used as a passive inverter, and it used to go on the input of the controls into the old 80's arcade games, because they need to send in inverted values for some reason no idea. I like to call em pu-tang wires, simplest component...
  2. ratstar

    Wahl "Peanut" Electric Razor blown

    (the motor) you could probably run it off any power source, wouldnt be ideal but you could tell it was working or not. Maybe a millifarad capacitor charged full block from a power supply might be able to pulse it, but maybe not I've only dealt with little motors up till now, this one is a big...
  3. ratstar

    Designing differential Signal modulator.

    Harold... So how bad is this resistor error on ICs? 1 ohm or 10 ohms? if its 10 ohms id be a little bit worried, but 1 ohm wouldn't worry the circuits I make. But I guess maybe keeping that in mind is important, always pays to be cautious in the unknown, but that would be in design time...
  4. ratstar

    Why a pull down resistor for transistor base

    (excuse this horrible banter I cant help myself.) Your amping it once, outside the arduino? and then your amping again inside the relay module, because your using off the shelf parts look at all the useless part repetitions there is in working modularly.
  5. ratstar

    Novel voltage doubler circuit need help plz

    I hope this works, heres a marx generator put into printable IC form, im going to fab it with my 3d printer, and it cant even be that miniaturized because you have to spread it out to the breakdown distance, but if i make in a vacumous environment, its actually 10 times lower than air, so...
  6. ratstar

    how much voltage can a vacuum capacitor suck up

    sorry stupid post. delete plz.
  7. ratstar

    Wahl "Peanut" Electric Razor blown

    test the motor with a source of power, it might be the motor thats dead?
  8. ratstar

    Novel voltage doubler circuit need help plz

    That lesson is the most cryptic thing ive ever watched... I like to explain (normal ac ones) voltage doublers as pumps with the capacitors powered with the power supply. (instead of the capacitor doing the work, the wind is doing the work by itself :) ) just suck in, and blow out, suck in blow...
  9. ratstar

    Novel voltage doubler circuit need help plz

    Im not making this thing to show off sparks, I need it to test electrostatic actuators, because i'm into graphite technology (which is just a fancier form of lead IMO), I'm only using really small spark gaps, the smallest I can manage, and using least volts and farads possible. Then theres...
  10. ratstar

    Novel voltage doubler circuit need help plz

    ha! Thanks for telling me, I thought this would have been done before. Can you measure the collected voltage of a Marx generator? I only can seem to read the capacitances individually, not the collected voltage and I dont know why... With big farads, these things are deadly, got to be...
  11. ratstar

    Novel voltage doubler circuit need help plz

    You discharge it through a spark gap, then it just charges again, over and over. Its the same as a spark gap oscillator. (Only needs DC,) It is still rectified oscillated AC out. its like PWM sorta.
  12. ratstar

    Novel voltage doubler circuit need help plz

    This voltage multiplier is different, works with dc! =) heres the 3 cap one's, schematic. I cant get a collected voltage reading, I wonder if its the 2k resistors confusing the meter?? When I read the caps separately they are all near the full 30 volts, and I was feeling a bit of the...
  13. ratstar

    Novel voltage doubler circuit need help plz

    I made a 3 cap one, the voltage reading isnt above 30 volts! but im getting small numb electric shocks from it (im using electrolytics so i can get voltage readings.), maybe im not reading the voltage right. When I read the caps one at a time, I do get the full voltage each time, but I...
  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

    Why a pull down resistor for transistor base

    If the transistor isnt switching on, you could try a higher ohmage, for the pulldown.
  16. ratstar

    cap self discharge

    Yep thanks for that, I understand now. So theres energy being lost that you cant get back, I wonder how much of the battery even enters the circuit, theres 25% just disappears without a trace, maybe more...
  17. 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...
  18. ratstar

    Why is it PNP instead of PPN for transistors

    haha. Thanks for the tip, but my speaker literally was 8 ohm dc! =)
  19. ratstar

    Why is it PNP instead of PPN for transistors

    I didnt think of the fact that "vacuumization" can help with heat transduction loss! thanks. I have a crazy idea, about "energy retainment" involving vacuum interrupters (for less loss in a spark gap, but I wonder if its soo lossy as hell anyway.) and big low resistance coils where being...
  20. ratstar

    Will a voltage divider waste power?

    It still works, but R1 and R2 have to be high value resistors, higher than the load, so it reduces current and voltage, and the more resistive the load the more it wastes as it equalizes with the R2 resistor. But I need to look at it further, there might be a way it can work! =) Maybe...
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