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51 lines
3.3 KiB
Plaintext
51 lines
3.3 KiB
Plaintext
Episode: 3123
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Title: HPR3123: Arduino controlled Christmas lights
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Source: https://hub.hackerpublicradio.org/ccdn.php?filename=/eps/hpr3123/hpr3123.mp3
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Transcribed: 2025-10-24 17:16:40
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---
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This is Hacker Public Radio Episode 3123 for Wednesday, 22 July 2020. Today's show is entitled
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Arduino Control Christmas Lights
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and is part of the series Arduino and Related Devices. It is the 10th anniversary show of Archer 72
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and is about three minutes long and carries a clean flag. The summary is
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controlling Christmas LED lights within Arduino.
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This episode of HPR is brought to you by AnanasThost.com. Get 15% discount on all
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shared hosting with the offer code HPR15. That's HPR15. Better web hosting that's
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unfair at AnanasThost.com.
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Hello, this is Archer 72. Welcome to Hacker Public Radio.
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I had the idea to take three strings of LED lights that were on my Christmas tree
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and make them reactive to the music. I started with the project with an Arduino Uno
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as basically a breadboard to make sure the project would work first.
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I tried initially powering it the project with USB power but it made the audio signal unstable
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and I was having outputs to the LEDs even though I didn't have an input from music or anything.
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So I tried plugging it into the power at the barra plug and that seemed to work out a little better.
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After I finished the project, I ended up using a generic Arduino Nano to control the project
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and slated the other one to use for another time.
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I took a preamp that was off Amazon and I modified it to...
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I took the electric mic off and took the inputs and used that to take the laptop,
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music source and input it to the preamp.
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I ran the output from this preampifier to A0 on an analog input to the Arduino
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and then split the signal out to an external speaker so I could still hear what the music was going on.
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I used the digital outputs listed in the sketch, the three outputs to power the LED indicators
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and as for a reference if you're not familiar, the sketch is a program that the Arduino runs through a loop.
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I used pins 10 to 12 as an analog right to provide power which is a range of 0 to 255
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and I used 150 as the power on state to the solid state relays which needed about 3 volts.
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I used a Dremel to separate the power to the common side of the power outlets
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because it was modifying electrical outlets to run to the lights.
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I used three of the outlets to power three strings of Christmas LED lights
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and I used the other one to power the Arduino.
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I'll post video of the circuit working on archive.org.
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I had to pull out the audio though because otherwise it would have been a copyright violation.
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Thank you for listening. There's been Ardui 72.
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You've been listening to Hacker Public Radio at Hacker Public Radio.org.
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We are a community podcast network that releases shows every weekday Monday through Friday.
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Today's show, like all our shows, was contributed by an HPR listener like yourself.
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If you ever thought of recording a podcast and click on our contributing to find out how easy it really is.
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Hacker Public Radio was founded by the digital dog pound and the Infonomicon Computer Club
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and is part of the binary revolution at binwreff.com.
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If you have comments on today's show, please email the host directly, leave a comment on the website
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or record a follow-up episode yourself.
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Unless otherwise stated, today's show is released on the create of comments,
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attribution, share a life, 3.0 license.
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