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  1. bigkim100

    very low voltage, very low power emf generator,

    Is it possible to make a very low voltage, very low power emf generator, to test EMF Meters. It only needs a rage of a few inches. Whatcha think? Thank you for any help, in advance
  2. bigkim100

    Regulated 12v Supply, Hum reduction

    Its only a slight hum, but noticeable. I did not realize that the bridge rectifier changed it to something other than 60 hz. This does use a big, chunky full wave diode bridge module, mounted to the case for heat dissipation, I can only guess. This is all followed by several high value...
  3. bigkim100

    Regulated 12v Supply, Hum reduction

    Ok, so I have my old 12Vdc 6 amp power supply, with TONs of fresh electrolytic capacitors, but Im still getting a bit of 60cycle hum. I doubt that I will ever be pulling more than 2 amps from it, but it is rated at 6 amps. Can someone suggest a choke, capacitor combo that will finish off the...
  4. bigkim100

    Power Supply

    Im sorry, I meant the low voltage dc side, pre and post regulation. Thank you tho
  5. bigkim100

    Power Supply

    I was lucky enough to find a basic schematic using the ic and transistor. With the schematic, I was able to remove all the assorted jigged up wires, that I think someone had used to bypass the ic. Many wires later, and a pile of wires removed I found that it worked perfectly. I have added a...
  6. bigkim100

    Power Supply

    Ok, so I need a brute force 12v 6 amp (at least power supply. I bought one for 10 Canadian Bucks at a Rummage Sale, and it outputs only 9vdc. It uses an oooold± Silicon transistor 2n6576 and a ooooold 723c control ic. Is it worth getting this thing going with a new circuit, as it has a...
  7. bigkim100

    555 continuous timer

    Ok, got it working
  8. bigkim100

    555 continuous timer

    sorry, I meant 1 and 5 to ground 8 and 4 positive????
  9. bigkim100

    555 continuous timer

    Ok, so lets say that the on cycles and oss cycles are to be between 1 and 5 seconds? and is 1 ground and 8 positive?? sorry about this
  10. bigkim100

    555 continuous timer

    I cannot get this one to work either...Im sorry
  11. bigkim100

    Is there a way to EASILY slowly extinguish a LED to mimic a incandescent bulb.

    Im not a programmer, I was hoping for a electrolytic, and a transistor type circuit
  12. bigkim100

    Is there a way to EASILY slowly extinguish a LED to mimic a incandescent bulb.

    Is there a way to EASILY Low parts count) slowly extinguish a LED to mimic a incandescent bulb. Voltage used is 9VDC. Thank you very much in advance
  13. bigkim100

    555 continuous timer

    Thank nyou Thank you so much Analogue, I do appreciate it
  14. bigkim100

    555 continuous timer

    Im finding that the Led attached to ground, does not turn off, and that the circuit is very unstable, any ideas?
  15. bigkim100

    555 continuous timer

    For better control of the ON/OFF cycles should I use a circuit that uses 2-555's?
  16. bigkim100

    555 continuous timer

    I have built this continuous cycle timer, (schematic attached) and it works, but it doesnt seem to have much range. I need the 2 cycles (ON/OFF) to be around 1 to about 5 seconds, (ON/OFF Cycles to be adjusted individually) but as it is, it seems to only have timing cycles of a second, or...
  17. bigkim100

    4017 Different LED count

    I dont know how to do programming for microcontrollers Is there a way to do it sans Microcontroller
  18. bigkim100

    4017 Different LED count

    Any way to get a 4017 (Driven by a 555) to count down rather than up. can this be switchable from counting up, to counting down LEDS?, or will I have to use something different than a 4017? Thanks in advance for any help
  19. bigkim100

    Adding Frequency Scanning to any AM/FM/SW Radio

    Ok, I was hoping someone who will help me with replacing the standard tuning capacitors with Variactors
  20. bigkim100

    Adding Frequency Scanning to any AM/FM/SW Radio

    I do not want it to stop at stations at all Can I add Variactor tuning to a radio with standard Variable Capacitor circuits
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