12/14/2014, Video of Light Show

Finished some wiring today, and dragged an old computer down to run the lights.  I wanted to be able to have the old computer sitting down there so it didn’t need to set it up and torn down each time.

I wired in a PC power supply, and grabbed the 5V to power the lights.  It also uses the 12V for turning the FETs on and off.  There were a couple of light bulbs out, but since the whole thing is going to use LEDs, I didn’t feel like spending the time to change the bad bulbs.  Strangely, when I look back at my last post, I was pretty certain that I wasn’t going to work on the wiring.  Turned out it was low hanging fruit that needed to be done, and I had bought more crimps, so it made it pretty simple.  Here is a link to the video.  The blinking lights are slowed using a 100 ms sleep so the lights don’t blink too quickly.  I turned the basement lights off which is why the video is grainy.

The 5V from the power supply definitely doesn’t have enough ummph to run the mixture of 44 and 47 bulbs.  The playfield has about 50 bulbs, and when trying to run all of them, the bulbs get really dim.  Looking back at the bulb measurements I did, a 44 is 220 mA, a 47 is 136 mA, while a 4 SMD LED bulb is about 30 mA.

The test worked well enough, that I’m probably just going to tear down the setup and start working on the top side of the playfield and the cabinet.  Both need to be sanded down so art can be applied.

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