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  1. KJ6EAD

    Adjusting LED color temp?

    What are you using for power; batteries, regulated supply or unregulated supply?
  2. KJ6EAD

    identify the ohmage of this slide potentiometer..

    That's what I expected as well, but apparently not. The design may have incorporated a non-linear amplifier stage or some other means to accommodate use of linear pots.
  3. KJ6EAD

    Help with USB pinouts

    You can get the cable from http://www.gilsson.com or carry on making your own.
  4. KJ6EAD

    Logo Suggestion

    You could grab a picture of any of the Catholic saints named Vincent (Ferrer, de Paul, etc.) from Google images and edit it with some typical electronic symbology.
  5. KJ6EAD

    identify the ohmage of this slide potentiometer..

    500k linear for VR6-VR9 and 25k linear for V10. The 1.8M full scale measurement on VR10 is due to damage. Double the 50% measurement to get the real value. A marking of 500kB or 504B would be a 500k linear taper. An "A" in the place of the "B" would indicate an audio or logarithmic taper...
  6. KJ6EAD

    DC power supply

    I like Dave's design on the EEVblog but I've always wanted an adjustable lab power supply that had three big bright LED displays; blue for voltage, red for current and emerald green for current limit setpoint which would turn amber whenever the limiter was activated by the load.
  7. KJ6EAD

    identify the ohmage of this slide potentiometer..

    Yes, 500k linear if the others measure similarly. VR10 will probably be different and may be logarithmic.
  8. KJ6EAD

    identify the ohmage of this slide potentiometer..

    I'd use 250k for VR6-VR9 and 25k for VR10.
  9. KJ6EAD

    Can you help me identify this connector?

    Unsolder one and read the manufacturer logo/name and part number on the bottom. Heat sink the pins when you unsolder them to prevent damage to the connector body.
  10. KJ6EAD

    Looking for a schematic symbol for adjustable mechanical thermostat?

    ANSI Y32.2.4.
  11. KJ6EAD

    lg model 50pg20ua no power at all

    When the output filter capacitors died, they probably took one or two transistors with them. We'll need to see the transistors mounted on the aluminum heat sink in the vicinity of the dead capacitors. Use the close-up or macro setting on your camera and good lighting as before.
  12. KJ6EAD

    Single Flashing LED circuit

    If there are no markings, that may be a 0 Ohm jumper which wouldn't protect the LED from overcurrent if it doesn't have a blinker circuit inside. By the way, a 3V supply wouldn't light a blue LED very bright if at all. Something's not right here. Do you have a multimeter? What happens if you...
  13. KJ6EAD

    Single Flashing LED circuit

    That resistor doesn't look right. There don't appear to be any color coding bands. Does it have any markings; if so, what are they?
  14. KJ6EAD

    I am a pretty new electronics guy trying

    The documentation for the ShiftBrite product offers a program for the Arduino microcontroller.
  15. KJ6EAD

    Very simple quick problem

    They're basically a match head with a nichrome heater wire inside and can be found for less than $1 each. Try a low wattage resistor like 1/16 W hot glued between three matches with a fuse.
  16. KJ6EAD

    I am a pretty new electronics guy trying

    Do you just want to see the 3 basic colors or do you need combinations? Do you need to match brightness (luminosity) from color to color? Do you need just a simple repeating sequence, or something more complex? Is there a reason why the product shown in your second link isn't adequate?
  17. KJ6EAD

    Question about ac adapters

    Most but not all coaxial DC connectors for that voltage will be center pin positive and the case near the socket will have a tiny diagram showing the polarity. If you end up replacing the plug on the adapter, the following may be useful. The pin diameter will likely be 2.1mm and the plug...
  18. KJ6EAD

    Equalizer box

    If you use the search term "headphone equalizer" you can see lots of options. If your intent is to only use this with a computer, there may be some software solutions available.
  19. KJ6EAD

    Candle lights

    8 bulbs should use 144 mA of the 200 mA the power supply is rated for so it should be fine. It took me a minute to understand that when you said extra current you meant the unused current capacity of the supply. It's not wasted, it's unused. You're supplying the required voltage to the devices...
  20. KJ6EAD

    Candle lights

    Just wire them all in parallel to your 3V supply. These devices have all the control circuitry integrated so there's no need for any current limiting resistor. Your power supply will be running near it's limit with 10 bulbs so watch for excess heat, use a supply with a higher current capacity or...
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