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  1. (*steve*)

    Transistor amplifier gain

    Would this result in a higher quiescent current drain? Could that be a bad thing? Also, look at the current gain of the transistor with respect to collector current. Do you notice anything as the collector current rises? What impact would this have on the base current and hence the voltage...
  2. (*steve*)

    Detecting Leveling of Arm and Shoulder

    If you're using an accelerometer, I would have it in an orientation (or measure the axis) which results in a change of sign when motion is reversed at the top of the swing. This will happen at two places, and you can use other measurements to determine if it is at the top or the bottom.
  3. (*steve*)

    Transistor amplifier gain

    Yes, the gain will be approximately the same in both cases. Can you think of some possible negative side effects of the higher current version? What if you used 20 ohms and 2 ohms? And what about the positive effects? Do you understand output impedance?
  4. (*steve*)

    calculate number of turns and length for inductor

    Colin, you are full of bovine excrement. I will agree that there is an error in ag's calculation. In the first case, the result is in uH and he mis-stated it as mH. I'm not sure what the error was in the second calculation, but it probably also included a misinterpreted prefix. Perhaps he...
  5. (*steve*)

    Stage Line 500W amp repair project

    I have a post (about 10 posts back) with many many points for @bikemech to consider. I assume they are still valid?
  6. (*steve*)

    CMOS 4001 Repeating Timer

    You can eliminate the crystal and the capacitors by using the internal 8MHz oscillator. Essentially you just have a bare chip. There's also the picaxe which is available in an 8 pin device and is programmable in basic.
  7. (*steve*)

    calculate number of turns and length for inductor

    You will note that one is for long coils. This is generally where the length significantly exceeds the diameter. I recommend you use the formula that most closely matches the inductor dimensions then measure and trim as required if the absolute value is critical.
  8. (*steve*)

    CMOS 4001 Repeating Timer

    Check the resource we have on long duration timers. What you want to do is extremely difficult with a single RC delay. These days a microcontroller would be the simplest solution, but (as I think has been suggested) a combination of timers and counters is also probably viable.
  9. (*steve*)

    T3J81 (Zener Diode ?)

    No they're not. You're probably thinking about avalanche breakdown.
  10. (*steve*)

    Capacitor getting hot

    I'm with Bob
  11. (*steve*)

    Trouble understanding shunt resistance for short-circuit current measurement

    One issue you may have is that the resistors in instrumentation amps should be very close tolerance devices. If you have a large number of these resistors, measure lots of them and choose those with resistances which cluster closely together. The exact resistance matters less than how close...
  12. (*steve*)

    Measuring accurate low current which measurement hardware to buy

    Go to eevblog and look at his microcurrent device. This is ideal for doing the measurement, period you can have a microcontroller log the readings.
  13. (*steve*)

    Help to find Sata To 4Pin power connector cable??

    Yeah, replace "hard" with "floppy" in that google search :). Id try the same search on eBay.
  14. (*steve*)

    Help to find Sata To 4Pin power connector cable??

    https://lmgtfy.com/?t=i&q=hard+drive+power+sata+converter
  15. (*steve*)

    Timelapse Electronics

    Perhaps if we can have a link to the design from the time-lapse forum and an explanation of what has "blown" and why you think it has blown. As to someone doing the writing for you, where in the Antarctic are you? I'll get the sled dogs out and come on over to help you. Can I come over...
  16. (*steve*)

    I've been trying to put a paper design on a bread board and not getting through

    And, if possible, a photo of your breadboard so we can see what you've done.
  17. (*steve*)

    Really Need Advice Making Micro Wind Farm

    You can't have 500W per hour. That's like 45 miles per hour per hour. Watts are a measure of how fast energy is flowing, Wh are a measure of energy. You might want 500Wh per hour, which essentially means an average of 500W. It is more sensible to talk about an average power (W), or energy...
  18. (*steve*)

    Drone followers

    @Lolli seems upset we wont do his homework. He reported three posts in this thread with the message: This thread will now be closed because we don't do people's homework.
  19. (*steve*)

    Can it damage IC if connecting two speaker in parallel in output?

    Your 8 ohm speaker was probably not capable of handling the power from your amplifier.
  20. (*steve*)

    Who-da Thunk?

    Tell us what you want to do, not how you think it should be done ;D
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