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  1. (*steve*)

    Theory/reality mismatch in a transistor circuit

    Have you measured the voltage across the DC rail? i.e. measure between the anode of LED2 and ground. This should be the same as the voltage across C1. Your "unusual" wiring doesn't make the breadboard layout clear. I would recommend that you place the DC +ve and DC ground rails along the...
  2. (*steve*)

    Electromagnet levitation circuit LED not glowing

    Yes, that is correct.
  3. (*steve*)

    mppt charge controller

    A zener diode is one option. A long cable run with a large capacitor at the end will act a bit like an LC filter, tending to smooth out those pulses. The lower the ripple the panel sees, the better. If the DC-DC converter runs in continuous mode, you see something more like a ramping of...
  4. (*steve*)

    Connecting corded phone to telephone socket in another room

    Well, if the pipeline adapters are for network use, they won't work with an analogue phone. Why not give us a link to the device you're contemplating?
  5. (*steve*)

    PWM setup

    No it won't. At whatever voltage they are, it will deliver the appropriate current to deliver 20W. Actually, it's more likely it just delivers a constant current, but that's beside the point. I'd add a few more 3W LEDs in the string until the voltage required increases to around 30V. What...
  6. (*steve*)

    Boolean Expression to 2-input logic gates only

    Aaah! I thought that was what you had modeled in the K-map. Why not start with something like this: x'y'z + x'yz' + xy'k' + xyk x'(y'z + yz') + x(y'k' + yk)
  7. (*steve*)

    Transistors, Triacs, and Thyristors

    Let me rephrase your question in a way that everyone can understand. "I need some double ended chalk. What sort of cheese can I use to make that?"
  8. (*steve*)

    when you learnt and become pro, did anything amazing happen?

    Unfortunately I never became a pro. I just turn tricks on the weekend for extra cash. I can't believe I said that.
  9. (*steve*)

    Simple DC Motor setup - NEWBIE HELP!!!

    I'd go a tumble drier. Have a slightly hidden switch that just turns on the motor. If anyone comes searching for contraband, a drier is hardly suspicious. And it just might be that you are drying your heat pack -- the sort filled with grain. Now, if you can just disguise the rest of the...
  10. (*steve*)

    Theory/reality mismatch in a transistor circuit

    The base current is what it needs to be. It's almost unimportant in this circuit. As long as there is sufficient current available from the bias network.
  11. (*steve*)

    auto scan fm radio problem

    CAN WE STOP SHOUTING? IT MAKES MY EYES BLEED.
  12. (*steve*)

    Flashing LED problem

    It's an amplifier based on the LM3886 (nor 386!)
  13. (*steve*)

    auto scan fm radio problem

    OK THAT SOUNDS FINE. BUT CAN WE STOP SHOUTING?
  14. (*steve*)

    mppt charge controller

    If you are charging a battery the voltage across the battery stays relatively constant regardless of current. Altering the duty cycle until you achieve the maximum current will put you at the point where the most power is being delivered to the load. This will be the point at which you are...
  15. (*steve*)

    Electromagnet levitation circuit LED not glowing

    Are you telling me you don't have a power supply right now? (No wonder it's not working)
  16. (*steve*)

    Boolean Expression to 2-input logic gates only

    Excellent. What did you come up with?
  17. (*steve*)

    Resistor Value

    You're going to have fun finding anything with "23" because in the standard series that use 2 digits and a multiplier, 23 is not a standard value Even in the E192 you only get 229 or 232. That doesn't mean these values aren't made, they're just not standard. However, given that it still...
  18. (*steve*)

    Simple DC Motor setup - NEWBIE HELP!!!

    Let's keep this in topic, I don't want anyone losing their heads. Probably the easiest way to couple the motor to the axle is with a belt and appropriate size pulleys. Depending on the weight of the motor and the amount of torque required, it's weight alone may be sufficient to keep tension on...
  19. (*steve*)

    auto scan fm radio problem

    Can you manually tune it to 98.2MHz? Does it skip this frequency when scanning, or not recognize it as a station while scanning? How strong is this station compared to the weakest ones the scanner can find?
  20. (*steve*)

    Simple DC Motor setup - NEWBIE HELP!!!

    And therefore nobody drinks. Bwahahahaha
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