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  1. (*steve*)

    Restoring a FOXX FUZZ-WAH

    My guess is that it's dpdt and 3/6 are common. But testing the switch would be the best approach. Second best would be accurately reverse engineering the circuit (or at least some part of it around the switch) in order to try to determine a plausible use for it and hence the likely contacts...
  2. (*steve*)

    i'm in very much confusion :\ teach me masters!!!!

    2.43Ω for 300W at 27V. 1.1Ω would be greater than 650W (and if recommend 1000W to 1200W rating of the resistor in question. However, a motor draws more than the normal peak current on startup, so a simple resistor doesn't represent a load which is a lot like a motor (it also doesn't do the...
  3. (*steve*)

    i'm in very much confusion :\ teach me masters!!!!

    Wide margin of safety? Relatively little difference in cost? Less risk of burning yourself? Less need to be perfect with your heatsinking? Allows higher ambient temperature? More rugged? Probably one or more of them. Doubling is a pretty common ballpark when you rate resistors. It helps...
  4. (*steve*)

    Question About Old Television

    If you're lucky, the problem may simply be due to dust around the EHT area of the TV. Is it unusually humid? You can carefully blow out any dust inside the TV, by be sure that it's been turned off for an extended period first (like a day). Don't power up the TV until you replace all covers...
  5. (*steve*)

    i'm in very much confusion :\ teach me masters!!!!

    Having a dummy load rated for a higher power than it will be called on to dissipate means you won't be running it right on the edge of failure. If you need to reliably transport 10 tons of equipment, would you prefer to use a truck rated for a maximum load of 10 tons, or would you prefer one...
  6. (*steve*)

    Unusual component identification

    High voltage diodes (if that's what it is) can't be tested with just a multimeter. But we're not going to help you with a weapon.
  7. (*steve*)

    How to calculate resolution of ADC

    I'm counting the bits, two-three-four-five I'm feeling the heat, my homework's due I'm counting the bits, six-seven-eight-nine I'm wishing that it, that it was done Think about them, you think about V Think about them, counting the bits Thinking about you, thinking about V Thinking about you...
  8. (*steve*)

    Is this schematic correct?

    Doing the same thing over and over and expecting a different result is not considered best practice. Have you tried to ID the transformer and look up a datasheet?
  9. (*steve*)

    Absolute Noob, help identifying component.

    See if anything is written on the epoxy part remaining and look for the other half rattling around in the case.
  10. (*steve*)

    window comparator help

    Why not a battery, a resistor and a LED connected between A and B, and another between C and D, and so on. Connecting a wire between A and B will complete the circuit and light the led. Or connections between A and other points won't work. OK, the problem here is that a wire from A to D, and...
  11. (*steve*)

    Could defeating LIDAR speed detection be THIS easy ?

    An interesting argument. You feel you should be able to drive faster in an environment that is less safe!
  12. (*steve*)

    Using an N-Channel MOSFET instead of an NPN transistor reduces main circuit voltage

    The and to your direct question is that you are directly applying a voltage to the BE junction of a transistor. This is a very bad thing to do. The second part is that you are applying an insufficient voltage to a MOSFET gate, and then subsequently not pulling it low. Perhaps you should have...
  13. (*steve*)

    Physical size of cap's

    Yeah, I should have mentioned that. The relationship exists (roughly) for a cap you purchase today. The older the equipment the less it applies. I guess I should have asked about the age of the equipment. In more direct answer to your question, newer caps generally have lower internal...
  14. (*steve*)

    Physical size of cap's

    Generally speaking, a physically smaller cap with the same voltage and capacitance is likely to have worse specs in other areas. Is the new cap 105C or 85C? They typically operate in a warm environment. Another important rating is ripple current. The smaller cap is likely to have a lower...
  15. (*steve*)

    200kΩ or a 250kΩ for a replacement of a 220kΩ Trimmer Potentiometer Resistor

    Either one is fine
  16. (*steve*)

    Urgently Need Transistor Equivalent

    The most important thing is whatever is important in the circuit. There is rarely a single "best" equivalent unless the same transistor is manufactured by multiple sources (in which case they are likely to have very similar part numbers).
  17. (*steve*)

    Inverter Theory

    My inverter has an input voltage around 400V, and an input current of around 12A. You're better off with a higher input voltage if possible. With a high current you need far thicker conductors. The number of them is not important, just the total cross sectional area.
  18. (*steve*)

    Simulating a circuit which has an ATmega328, is it a waste of time?

    I've never had the need to simulate software.
  19. (*steve*)

    How do constant current loads work and how to make one

    No, the voltage reference is a source of a stable voltage to which other voltages can be compared. In this case the voltage across a current sense resistor is monitored and kept constant to ensure the load has a voltage across it which allows a certain current to flow. I'm not certain that the...
  20. (*steve*)

    Capacitor Protection Boards- How do they work?

    You'll need to take a better photo. We need to be able to read the values on the resistors and the markings on the other devices. However, it's already clear that this circuit is substantially more complex than the last one. Is not simply a case of a LED being stuck somewhere.
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