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  1. (*steve*)

    OK To Reverse One of Two Batteries To Prevent Leakage?

    If the battery compartment is such that a reversed battery won't make contact then you'll be even safer.
  2. (*steve*)

    four way traffic lights - help

    Also R4. I suspect the ground symbols are incorrect and should be removed. Also, for the red LEDs on the left, the connection of the yellow LEDs should be above both red LEDs rather than between them.
  3. (*steve*)

    How does a 110v portable generator with brushes generate electricity?

    Feel free to start a thread in the general electronics chat section. I'm sure it will be well read :)
  4. (*steve*)

    What would be the effect If I change 4700uF capacitor to 18000uF?

    The change week have some effects. 1) the ripple on the output will be less at a given current with the larger capacitor. This may reduce hum. 2) the current surge at power on may be higher or longer. In the worst case this might blow a fuse but generally is not an issue 3) the peak current...
  5. (*steve*)

    Would this transistor work?

    A very quick eBay search reveals you can get 100 2N3904 transistors for $1.48 with free shipping. I didn't look too hard, you can probably do even better.
  6. (*steve*)

    Would this transistor work?

    9c each is pretty expensive. In quantity you can easily get way below this. The cheapest transistors I have cost me around 1/20c each -- but they're in an inconveniently small package.
  7. (*steve*)

    converting 2.4 gig wifi to baseband signal.

    In addition to what Harald said, that chip doesn't operate at 63MHz. I was hoping the datasheet would tell me what you are trying to do, but I'm still uncertain. Please continue to give us updates on your progress. I hope to figure out what you're doing someday.
  8. (*steve*)

    how to make a non linear load setup for ups testing

    What form of non-linearity is desired? Constant current, constant voltage, constant power, negative resistance, etc...
  9. (*steve*)

    Power supply help wanted with bridge rectifier.

    The peak current through the rectifier into filter capacitors will be many times higher than the average current drawn from the power supply. That may be a contributing factor.
  10. (*steve*)

    Foot Switch help

    You shouldn't switch neutral. Whether or not this switch is suitable for switching the maid to your devices depends on its voltage and current ratings and those of the device being switched. If the foot switch is suitably rated, then use it as intended. If not, a relay may be an option, but...
  11. (*steve*)

    Switching Power Supply

    I think you misunderstand what a switching power supply is. Yes, things get rapidly switched, but the output is plain DC. Do you want to control the speed of a motor using PWM or maybe a servonotor? That's different, but your specification for on and off times then makes more sense.
  12. (*steve*)

    electromagnetism

    I'm on my phone and can't easily search for the context of the sniper of your post that ak quoted. On the surface, the quote does seem a little off-base. Perhaps if I read more fully it would make more sense. Nevertheless, you need to accept that different people have different opinions about...
  13. (*steve*)

    Converting 2.4Ghz ---> 63Mhz Serious Concerns.

    One problem you will face is that 2.4GHz WiFi has a bandwidth of several MHz. Trying to modulate a 63MHz carrier with a signal having that sort of bandwidth is going to cause you a world of pain. If your problem is distance, then Harald is spot on. With the right antennas, 50mW from a standard...
  14. (*steve*)

    electromagnetism

    I was thinking the OP was designing some sort of flip-disc (or flip-dot) display.
  15. (*steve*)

    Transistor mystery

    Hey, all I wanted to know is whether you wanted to learn electronics or you had some other problem you were trying to resolve. I hope you'll forgive me for giving you essentially the same answer that ak did (twice), and accept my profound apologies for being on a mobile device at the time where...
  16. (*steve*)

    how to make a non linear load setup for ups testing

    The suggestion to use heater elements is a good one. You can simply switch them in and out to change the load.
  17. (*steve*)

    nubie pot question

    And we're just poor electronics guys. And this one wouldn't know a vav from a tstat.
  18. (*steve*)

    Need high voltage/current DC with adjustable frequency

    Do you see the trace coming from under the bottom of the chip that you have ignored?
  19. (*steve*)

    Need high voltage/current DC with adjustable frequency

    1) are there comments on the other side of the board? 2) do you see that trace coming from under the chip to the resistors? Is that connected to pin 6.
  20. (*steve*)

    nubie pot question

    If you have 4 thermistors arranged in series/parallel and you place the pairs of series connected thermistors together, the overall resistance will follow a pattern similar to that of a single thermistor placed in an environment with the average temperature (where average has an undefined...
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