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Comet LED Pop Bumper Rings - School boy error

MadNat

MadNat

Registered
5Years
Joined
May 11, 2019
Messages
1,061
Location
Warwickshire UK
I've been meaning to fit some pop bumper LED's I bought over a year ago... I allowed style to rule over function and didnt put enough hot glue in place when I bonded all 3 to the respective bumper caps. Within a few short games (thats how I play!), all three had dropped onto the metal bumper ring and shorted - d'oh!

So 18 months waiting to fit - 10 minutes of use!

Question is - can they be repaired after suffering a short? (I am an enthusuastic SMD reworker)... guessing not, but I feel a level of responsibility to the sad looking rings, to try and bring them back to life...

Nice product while it was in place - lit up the playfield nicely with the white down facing LED's and added a bit of sparkle with the up facing circle of leds and centre led - nice touch.

Recommend them - but make sure they're properly stuck in place!

Thanks in advance.
 
smd leds can be replaced. i just did one last week on a ws2812b panel. i blew up the first led by putting 10v instead of 5v through it. i got it off with a reflow heat gun and soldered the new one in with my finest smallest soldering iron.
 
Buddinblack said:
Got a link to the ones you used Mike?


Sent from my iPhone using Tapatalk
Click to expand...

Here they are:

www.cometpinball.com

Pop Bumper Rings

Treat your transparent pop bumper caps to a luxurious new lighting scheme with our pop bumper rings. With 30 separate diodes these are sure to dazzle. Choose different colors for the top and bottom for an added effect. Check out this full product review of the Comet Pinball Pop Bumper Rings...
www.cometpinball.com www.cometpinball.com
 
Mike
I have them in my T.Z and TAF I used clear silicone to secure them in place been solid ever since.
 
@MadNat I used these

They raise the pop bumper by about 5mm. Then designed my 2812 with the full size board with slightly longer screws works a treat no chance of course of breaking loose.
 
Did a bit of investigation tonight. Seems there is a tiny ac -> dc arrangement (basically a couple of diodes/rectifiers) in the bulb wedge adapter.

Clearly these components don’t like a dc short and blows one of the diodes.

Too fiddly for me to repair. Could be fixed with a replacement wedge adapter with the a working ac->dc circuit.

All the LED’s, resistors and the tiny pot for adjusting brightness seem fine on the ring.

Shame there isn’t a diode on the dc side to protect a short blowing the ac->dc bits.
 
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