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Dennis, In my experience the difference in brightness between 470 to 1k is to small for my eyes to pick up. Try 4k or even 10k. David Klemm Sent from my iPhone 12

Dennis, I've added a chart I made to help determine resistor values to the photo section. Feel free to copy it. In my experience, you need to go much higher in your resistor values. Try a 4K, and

Two alternate ways of doing this: 1. Use a potentiometer instead of individual resistors. A 1 megohm pot should work well. Just connect the leads to one end and the wiper and adjust until you get

Scott H. Haycock <shhaycock@...> added the photo album Resistor Codes ( /g/w4dccqa/album?id=289616 ) : A chart to read resistor values

Scott H. Haycock <shhaycock@...> added folder */Resistor Codes*

It's not a dumb question, but is highly relevant to LEDs. Stay away from anything below 1000 ohms. I use 5100-6800 ohms for headlights on steamers, and 22000-27000 for markers. It takes at least 3300

Hi I m new to some of this . What ? iam trying to do ?is to dim leds down ?.I have tried several different types of resistors like 470, ?680 , ?750 and 1k ohms and can’t ?dim them . ?I used

I agree with what Don Weight said. DonV

The circuit in the ad is only the rectifier and filter capacitor. There is no regulator, so the output depends on the input. I don't know why it's described as 6,12, or 24 V in and 12V out.. Clearly

rrmaven <dan.shirleylee@...> updated the photo album Passenger car lighting for DCC and DC power ( /g/w4dccqa/album?id=289465 ) : 2 photos of a homemade AC-to-DC bridge

rrmaven <dan.shirleylee@...> added the photo album Passenger car lighting for DCC and DC power ( /g/w4dccqa/album?id=289465 ) : Photos of ha homemade AC-to-DC bridge

Greg- I am finally returned from my travels and can respond as per my note of Aug. 19. Since I made my comments, I saw a ready-made AC-to-DC converter on eBay that I think will work for you and costs

Some decoders have dimming capabilities. That could, given people have the right software and programming capabilities, even be programmed to change with the time of day, for anyone who wants to go

I would add only that the brightness you want and need will depend on your room lighting. If it's bright, your LEDs will need to be brighter (use lower resistances and higher currents) for the same

... just saying ... w Although calculated resistor sizes are "correct" (you won't blow the LED) - most LEDs we use are FAR too bright (to my eyes)?and so running them at reduced current/voltage is

Tom's numbers look good to me, although I've not measured the voltage drop across white LEDs. If each LED gets 8 mA of current and the voltage across it is 3V, then 24 mW is used in each LED to

Puckdropper, using two LEDs in series is good. Use a 1/4 watt resistor as it has more surface area to keep its operating temperature down. Even though the LEDs are diodes, you should protect them from

Use about 14 V for your starting voltage, and white LEDs drop about 3V each. So 14-6 = 8 V on the resistor. I = V/R = 8/1000 = .008 A = 8 mA. P = IV = .064 Watts.... Well below the rating of most

I have a program that I use and this is what it says to use. I hope this helps.?