Panasonic RC-7462 UV Light Mod Help Request

[Classifieduser]

Hey flip clock fans!

Just got in my first flip clock (RC-7462 that I've just repaired the motor on and got it running.

I'm hoping to replace the burnt out UV bulb with a UV LED similar to how Mackey did on his Copal 705L (https://www.flipclockfans.com/forum/...ed-flip-clocks)

I'm having trouble figuring out how to do the wiring for this, admittedly I'm very new to anything electrical and was hoping to learn from this restoration project. Where am I able to source the power to the transformer that powers the LEDs? I know most people source from the circuit board itself but I'm not sure where to solder the wires from there. I thought I could just take the wires leading to the stock UV bulb but I've heard that somehow has a higher voltage.

If anyone has any advice or pictures of how they did this mod that would be incredibly appreciated! Please let me know if I can provide any additional pictures or information. Thanks again for any help!


Here are the parts I'm using:
UV LED Strip: https://www.superbrightleds.com/mini...-UV~Blacklight
Constant Current Driver: https://www.superbrightleds.com/cons...river-3-12-vdc

[gschmidt958]

Even if you tap off a higher (DC) voltage, you should be able to power LED(s) with the correct current limiting resistor (resistor current and power dissipation would need to be considered in sizing the resistance and wattage of the resistor, V=IR, P=VI).

Personally, I would avoid using a UV LED as they can pose a hazard to your eyes. Do the numbers of your clock even have the yellowish tint indicating that they will glow in "black light"?

I have a clock I'm restoring that does have the yellow tinted letters, but I might just use standard blue LED(s) instead. If I do that, I would still make them switchable, probaby with a bistable reed switch.

[Classifieduser]

Thanks, I was able to get it working, wired straight into the circuit board power. Question on the UV LEDs, are they still a danger if it's indirect and through the plastic window? The LEDs aren't visible they just reflect off the lights in the window, wondering if that's enough to make it safe

[gschmidt958]

Glad you got it working. I think being indirect from plastic should help and I can't really comment on the hazard, best to not look directly at them and they can be bright, at least that's what I've read.

[George A]

Hi Classifieduser, Could you please post a pic of where you tapped into the board for your power for your LED? I too am getting a RC7462 and most likely will need to do the same mod. Thanks

[marc777]

I have the same clock and am also searching for the same information. Any help would be appreciated. Thanks

[George A]

Hi, here's a post (link) from our administrator Mackey on how to make a UV LED module for our rare Panasonic radios. https://www.flipclockfans.com/forum/...asonic-rc-7462

[George A]

[George A]

After looking at the so called strip light I think the 4 led set-up looks nicer than the strip. As far as longevity goes....well that's to be seen...

[marc777]

I have limited electronics knowledge (aside from basic soldering) and need guidance on where to source power for the transformer that supplies my LEDs. Thanks

[George A]

Hi Marc, I don't have an answer to your question as of right now as I am waiting for my resistors and a little red lens for my alarm indicator. I have asked that question a while ago with no response. Shouldn't be too difficult if you have a multimeter(Fluke) and start hunting around. Some say there's a 12 volt source somewhere on that board. Or I think some folke have used this driver for the LED's https://www.superbrightleds.com/cons...specifications

How it has a voltage range of 3-12 is anybody's guess unless it has an adjustable pot. Soldering is pretty straight forward, though I did not tin my wires before soldering to the LED's. I wrapped them around the lamp legs carefully so as they could stay put, I only have two hands...lol.The "cord channel" I purchased from Home Depot..."Legrand Cordmate C10" for hiding and organizing a single cord, $6 bucks. Comes in a 5' length....now I can start mass producing these......which is nice. LED's I purchased from Lighthouse LED's in Washington (state). Item# 5MMROUNDTOPUVPURPLE shipping was more than the product. Talked to the tech and he states that they should have a lifespan of more than 50,000 hours....we'll see...I hope more, the're on 24/7. Any more questions feel free to ask and I will keep you updated as I go along.