Re: Bulbdial – Was working fine – now has odd LED groupings

Home Evil Mad Scientist Forums Clock Kits Bulbdial – Was working fine – now has odd LED groupings Re: Bulbdial – Was working fine – now has odd LED groupings

#21100
Windell Oskay
Keymaster

If it was working properly to begin with, you can be assured that all of the LEDs are facing in the correct directions; they don’t spontaneously reverse direction.  And, if you really need to look, the right way to verify the orientation is by looking at the flat face on the collar of each LED, rather than at the internal wireframes; those vary between different types of LEDs.

Reflowing all the solder joints is usually *not* the way to find a problem, but it can easily create new ones if you overheat the LEDs, damage the traces, or create dry joints out of good ones.   Instead, try to look and see where the problem actually is, and only resolder where absolutely necessary. 
I’m not sure that I understand what you mean by “flipping and flopping.” You should measure the resistances with the power off; nothing should be changing while you do that.
If LED D21 is very dim, that could also point to a possible connection between lines LED1 and LED2.  Please check the resistance between these lines; they should not be connected.
A youtube video would probably not be helpful.  Checking the resistance between the LED lines would be. :)