Search:

Type: Posts; User: fixit7

Page 1 of 2 1 2

Search: Search took 0.00 seconds.

  1. Replies
    12
    Views
    716

    Closed: Re: Forward voltage of blue 3 mm led

    Thanks for all the help.

    My voltage source is 3 volts. Will I need a resistor in the circuit?

    Thanks,

    Andy
  2. Replies
    12
    Views
    716

    Closed: Re: Forward voltage of blue 3 mm led

    Thanks, I will do that.
  3. Replies
    12
    Views
    716

    Closed: Re: Forward voltage of blue 3 mm led

    The voltage is 3.7 volts for the 18650.

    I have a wall power source that outputs 3.6 volts that I will probably use.
  4. Replies
    12
    Views
    716

    Closed: Re: Forward voltage of blue 3 mm led

    I have no data sheet.
  5. Replies
    12
    Views
    716

    Closed: Forward voltage of blue 3 mm led

    I have this package of 30 3 mm blue leds.

    I do not recall where I bought them.

    The pic shows one of them powered by a 18650 battery.

    I was wondering what the forward voltage is?

    154948
  6. Replies
    12
    Views
    544

    [SOLVED]Closed: Re: 12 vdc led running very hot

    Ok, thanks.

    Running it now on 9 volts.

    :-)
  7. Replies
    12
    Views
    544

    [SOLVED]Closed: Re: 12 vdc led running very hot

    So, what kind of additional attention should I give to the 12 volt led?
  8. Replies
    12
    Views
    544

    [SOLVED]Closed: Re: 12 vdc led running very hot

    I have some 30 gauge un-insulated wire.

    Will that do?





    If the heat does not affect the component life, then I can accept the heat.
  9. Replies
    12
    Views
    544

    [SOLVED]Closed: Re: 12 vdc led running very hot

    Are you saying that if I replace it with a 1K resistor, it will not get as hot?
  10. Replies
    12
    Views
    544

    [SOLVED]Closed: Re: 12 vdc led running very hot

    It is not in a circuit.

    Resistor show is 510 ohms.

    154885

    [found at: imgur. com /a /bV07ys8]
  11. Replies
    12
    Views
    544

    [SOLVED]Closed: 12 vdc led running very hot

    I bought some 12 VDC 5 mm red leds.

    They work find but...

    when I touch the wires going into the led, they were hot enough that I had to remove my hand.

    That does not seem normal.
  12. Replies
    6
    Views
    638

    Closed: Re: Minimize effect of IR bulbs on image

    Do you have a link to those?

    Thanks.
  13. Replies
    7
    Views
    475

    Closed: Re: Rebuild low end computer speakers

    I am trying to find a ready made speaker system that includes woofer, mid range and tweeter speakers.

    No luck so far.

    Just systems with a sub-woofer ?
  14. Replies
    7
    Views
    475

    Closed: Re: Rebuild low end computer speakers

    I need help finding a place that sells it.
  15. Replies
    7
    Views
    475

    Closed: Re: Rebuild low end computer speakers

    Could you or someone help me find

    this part I will need ?

    2.55mH Inductor
  16. Replies
    7
    Views
    475

    Closed: Rebuild low end computer speakers

    I bought some Inland Pro Sound 2000 speakers from a thrift store.

    It is an amplified system putting out about 7 watts.

    They sound pretty poor.

    I remember making my own 8 ohm speakers years...
  17. Replies
    19
    Views
    1,209

    Closed: Re: Replaced NiMh battery in small solar light

    The 2.02 volts is without the battery.
  18. Replies
    1
    Views
    355

    Closed: Shielded-Power-Transformer

    I am trying to sell this. It was salvaged from a Yamaha receiver.

    I was told it was a shielded power transformer. If it is not, I would appreciate knowing what it is.
    ...
  19. Replies
    6
    Views
    638

    Closed: Re: Minimize effect of IR bults on image

    There is no remote.

    Just a basic wired system. (720p B/W)

    Opening the blinds a little helped.
  20. Replies
    6
    Views
    638

    Closed: Minimize effect of IR bulbs on image

    The IR bulbs are great for nighttime surveillance but not really needed when there is ample light.

    As you can see, in this image the IR light is reflecting off the blinds.
    ...
  21. Replies
    19
    Views
    1,209

    Closed: Re: Replaced NiMh battery in small solar light

    Ok, so no Chinese batteries.
  22. Replies
    19
    Views
    1,209

    Closed: Re: Replaced NiMh battery in small solar light

    It was without the battery.

    I think, as was mentioned, is that the charge circuit is not designed for a battery 4X of the original.

    Maybe there is a large self discharge?

    I can get (2) 600...
  23. Replies
    19
    Views
    1,209

    Closed: Re: Replaced NiMh battery in small solar light

    I think the chip in the pic is a solar led driver.

    http://www.datasheetcafe.com/yx805-datasheet-pdf/

    So, is it a "small battery charger" than uses electricity from the solar cell to charge the...
  24. Replies
    19
    Views
    1,209

    Closed: Re: Replaced NiMh battery in small solar light

    Thanks.

    0 volts at dark, 2.02 volts with full sunlight.

    Should I measure the current?
  25. Replies
    19
    Views
    1,209

    Closed: Re: Replaced NiMh battery in small solar light

    https://imgur.com/XiruKUT

    https://imgur.com/MaM7Ejo
Results 1 to 25 of 45
Page 1 of 2 1 2