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  1. (*steve*)

    Can someone identify this component?

    It could be 2 secondaries, or it could be 2 primary windings.
  2. (*steve*)

    Can someone identify this component?

    That is a transformer.
  3. (*steve*)

    9v oscillator to dc motor

    Perhaps you wired it incorrectly? Perhaps the 555 can't drive the relay? Perhaps you damaged the 555 (which you would likely do if you tried to switch a relay without using a flyback diode). Perhaps you should post a schematic.
  4. (*steve*)

    Making electrolytic triodes.

    If this were a vacuum tube, the frequency response would be significantly affected by the time it takes for electrons to cross the device. However, unlike a vacuum tube, ions will remain in the space between the electrodes when the current falls to zero. The frequency response may be better...
  5. (*steve*)

    Fix A Noisy Refrigerator

    This poster had a history of starting similar threads and not returning (he has also had a noisy air-conditioner). Added to that, he is not who he says he is. All the evidence points to him being a particularly inept spammer. I would be happy to see evidence to the contrary.
  6. (*steve*)

    Fix A Noisy Refrigerator

    Turn it off. Try a forum specialising in refrigeration. Wear earplugs. Let your children out of the fridge. Put the fridge outside. Find the noisy bit and hit it repetitively with a large hammer until the noise stops. One of these options is probably better than the others. It's a shame you're...
  7. (*steve*)

    Heat sink calculation

    :-) double :-)
  8. (*steve*)

    How to make -18v

    Probably the latter unless you have a DC to DC converter with an isolated output. Most of the cheap devices are not isolated (they typically have a common ground).
  9. (*steve*)

    Heat sink calculation

    Most of your formulae seem incorrect. There is a resource on heatsinking that may help you.
  10. (*steve*)

    Diode based battery oring

    Yep, that Google search seems relevant. Is there anything else you need?
  11. (*steve*)

    Led Timer Circuit

    Those would be skills you need to learn. What are you trying to do? There may be an easier way.
  12. (*steve*)

    Led Timer Circuit

    You could use almost any microcontroller, and the choice of leads depends on the program you've written and downloaded to it.
  13. (*steve*)

    Led Timer Circuit

    Well.... You could do it this way or this way (and probably many other ways as well).
  14. (*steve*)

    Help for logging

    Electric motors? Get some line driven hour meters which will count up as long as power is applied.
  15. (*steve*)

    Led Timer Circuit

    If you make a LED flasher from a couple of Schmitt trigger inverters, and power it from a capacitor, it will continue to flash, but get dimmer and dimmer as the capacitor discharges. Work the remaining gates in the package you can create a 1 shot 10 second timer which will power the circuit for...
  16. (*steve*)

    i++ and ++i operator

    If you study PDP-11 assembly language you'll see where many of C's features come from. The addressing modes of auto increment/decrement, deferral, and indirection provide 1 instruction implementation of many of C's arithmetic and pointer operations for a certain set of variable types. The...
  17. (*steve*)

    How do I use a multimeter?

    I'm not exactly sure that's what was meant :-) @MuchToLearn1234 I would advise you to post some images. We may be able to spot the problem or direct you to take more detailed photos.
  18. (*steve*)

    Testing a PSU output.

    Yes.
  19. (*steve*)

    Cheapest bank checks?

    How quaint.
  20. (*steve*)

    Cheapest bank checks?

    Yeah it's an American thing. Like imperial measurements. They have such a fondness for their old English masters that they are loath to reject these practices. They stedfastly hold to the old ways. :-D
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