I made a little LED Matrix and everything went wrong

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I designed this matrix 5 years ago and finally took some time to assemble and test it. All went wrong but I manage to make it work anyways. ...and it's bright!
Pixel Pump & SMD magazines: link.bitluni.n... (Sponsor)
code: github.com/bit...
Maker Faire Hannover: maker-faire.de...
Meetup@Musikkabinett: pretix.eu/smmk... (20% off)
Tools and parts (affiliate links):
Thermal Camera Infiray T2S+ /w focus lens: aliexpress.bit...
Preheating Station: aliexpress.bit...
Low Temp Solder Paste: aliexpress.bit...
Flux: aliexpress.bit...
Soldering Mat: aliexpress.bit...
SK6805 RGB LEDs: aliexpress.bit...
Clampmeter: amazon.bitluni...
Tweezers: aliexpress.bit...
Github Sponsors: github.com/spo...
Patreon: / bitluni
Channel membership: / @bitluni
Paypal: paypal.me/bitluni
bitluni live: / @bitlunilive
Twitch: / bitluni
Mastodon: chaos.social/@...
Twitter: @bitluni
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