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PSU gone POP!
2 Posts
April 3, 2020 - 9:12 pm
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Confirmed: Duff PSU.

Bought new one and we're all pretty.

Thank you for your assistance.

55 Posts
April 1, 2020 - 2:40 pm
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i think this should help... i think you had a duff psu...

55 Posts
April 1, 2020 - 12:01 am
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what's the power ratings for the button lights each in watts?

And what's the voltage for them? 5v 12v

the equation for power(Watts) Current(Amps) Voltage(V) is power divided by Volts times Amps

if you want the amps value - eg: 5 watts divided by 12 volts = 0.42 amps

2 Posts
March 30, 2020 - 6:41 pm
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Good evening.

I wonder if I may seek some advice, at least whilst my singed eyebrows stop smelling.

I am building my own cab. It's Full height 18mm MDF, screen, speakers, RPi 3B+ and Dragon USB based, BYO controllers. The whole thing has been together for around 2 years and has been working fine.

I finally decided to paint it and that meant it was time to add power to the light up buttons.

First attempt failed because I mis-read the power requirements. 2nd time I bought a web 10a PSU from Amazon.

If it's not that one it's very similar. I cannot remember exactly because it was over a year ago that I purchased.

I knocked up some 10a speaker wire into two crimped daisy chains, one of each onto positive and negative on 8 buttons. I then wired one of the two terminals on the PSU to player 1, figuring I'd use terminal 2 for player 2, thereby keeping the load even.

I turned on, and the control was flooded with a beautiful blue glow from each of the buttons. By the time I'd walked round the front of the cab, there was a pleasant bang and lots of smoke. I'd managed to pop two of the capacitors on the PSU.


Was I incorrect in running these connections in serial?

Did I have too many buttons on?

Did I wire something up wrong?

Did I have a duff PSU?

Can you recommend the correct way to do this?

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