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Conversation Between tblake and saxonmor
Showing Visitor Messages 1 to 6 of 6
  1. saxonmor
    03-24-2009 11:22 PM
    Well, here is the final product - CD player with LED replacements. All of the buttons are lit, but the button group to the right of the presets is dim, as are the knob displays on the left (I think it is just the way the light is diffused; the LED's are working. Anyway, it looks better in real life than the photo. I'm happy with it.
  2. saxonmor
    03-03-2009 10:05 PM
    Well, I had given up hope of getting it today, but then at 7:PM UPS showed up with my CD player. Right on the case is written "no lights", and sure enough, their aren't. The arrays are configured somewhat differently on this circuit board, but what took me an hour to define before took 10 minutes this time.
    The green LED's don't seem to produce enough light and I like the way the red looks, so I think I'll go with that. Time well spent my practice on the cassette deck. I'll post a pic when I get this one done. With all red (or maybe a yellow or two) it should light up nicely!
  3. saxonmor
    03-02-2009 09:41 PM
    I posted one kinda crappy picture at , but it'll give you an idea of what's possible. Thanks for the warning on the CD player. I wonder how many of the bulbs will be out when I get it!
  4. saxonmor
    03-01-2009 08:46 PM
    Well, success!..sort of. It is not so simple as soldering in a resistor and some LED's. The bulbs are in a number of varying parallel arrays, so you have to interpret the circuit and then compute the resistor value for each specific array. Then you have to remove the right jumper wires and solder in the resistor. I did all the calculations, then paused and thought, "Why am I spending all this time on this unit? It's a friggin' cassette player!" So I went to EBAY and bought a used OEM AM/FM/CD which hasn't arrived yet. BUT! Just to see if what I had done was correct, I went and bought the cheap-o LED variety pack and some resistors at Radio Shack and lo' and behold, it works! Looks trippy too. I have green LED's behind the preselected buttons, red on the lower row of settings and yellow elsewhere. SO! I am going to be posting that if anyone wants their unit converted over I will do it for a few bucks.
  5. saxonmor
    02-23-2009 02:10 AM
    Thanks for the reply. If I could get a little more input per chance... Where do you solder the resistor(s) in? There seems so little room to work with. I see what appears to be a common path which runs mostly around the perimeter of the board supplying the lamps (red lead.) Can a resistor be soldered into the lead that supplies the common without affecting other circuitry, or does each LED have to have its own resistor? Also, I calculate a 420 ohm resistor for a 3.3vDC LED @ 25ma. Do you come up with a similar figure? Thanks again.
  6. saxonmor
    02-22-2009 06:35 PM
    In one of your previous posts, you mentioned that Radio Shack has replacement bulbs for Lumina radios. I would prefer to switch to LED as I need to change some of the bulbs. But what are the specs? Is it a 12vDC lamp? Thanks. ~Kenn.

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