6/23/2023 0 Comments Raspberry pi hue sync![]() Just like I have a wire going from the GPIO 18 pin on the Pi to the data pin on the LEDs, I added another wire going from the ground pin on the LED strip to a ground pin on the Pi. The lights were fuzzy and not powering all the way until I grounded the LEDs to the Pi. I think DrZzs glosses over the importance of having the Pi and the LED light strip share a common ground. Second, the LED strips on the Pi just did not work right when I connected the data pin to GPIO 18. Download the image, flash it to an SD card, set up the WLAN and it’s good to go. First, instead of using Raspbian and manually installing Hyperion like in the video, I used a Pi image put out by Hyperion called Hyperbian. I did run in to some problems, or at least went off script from the tutorial video. Also the pins weren’t perfectly aligned with the copper bits on the LED strip, at least until I nudged them into place. It took me a few tries to figure out that the corners and strips go under the pins, but I got there eventually. When I was roughing the LEDs in, I just made loops at the corners to get a bend, but these make it look much better. These corner connectors are great for making the LED strips sit flat. What I like about this project is that I grab a female-to-female wire, plug it in to a GPIO pin on the Pi, and plug it on to the male connector of the LED strip. When I’ve seen LED projects before, you’ve had to solder wires to a ESP32 and then to the tiny contact strips. These little wires are actually a huge part of what makes this project accessible to me. So the HDMI splitter sits in my media console while the Pi is on the back of the TV. ![]() It means more HDMI cables behind my TV, but also helps with my cable management because my TV’s inputs are separate from the TV. I got this 4K HDMI splitter and this 1080p USB capture card. DrZzs’s recommendation is a capture loop – it sits inline with the HDMI between the source and TV, and sends a capture to the Pi via USB. The HDMI Capture Loop that DrZzs linked to in his description is sold out on Amazon so I went with a solution I found in the reddit comments. However, the more realistic calculation for LEDs is 0.02A/LED and 350mA for the Pi, so my final power estimate is about 4.5A. Also I followed DrZzs tip around 15:30 to power the Raspberry Pi from the same power supply, which recommends 2.5A. The conservative estimate for amperage is 0.06A/LED, so 300 LEDs could need as much as 18A. I was worried that the 10W supply wouldn’t be enough for the 300 LED strip, and technically it isn’t. Remember, I’m threading the needle between “excited for bias lighting” and “too complicated to bother with,” so convenience matters. The 10W supply comes with a barrel connector that makes plugging everything in easy.The 20W supply requires you to wire your own power cord in.I prefer the 10W power supply that DrZzs linked to for two reasons: Someone on reddit suggested a 20W power supply to go along with the higher power usage for a 300 LED/5m strip. I have a 55″ TV and used 212 LEDs from the strip. In retrospect, the 150 LEDs would probably have been better because they are lower power and we don’t need very high resolution for this. I can also control it with Home Assistant!ĭrZzs recommends these 150 LED/5m strips but I bought these 300 LED/5m version. As a bonus, there are a bunch of fun effects so you can use it as an ambient RGB light when your TV is off. I had no idea something like that existed, and now it’s glued to the back of my TV. The magic behind it is Hyperion, an open source system for doing bias lighting based on an HDMI input source. ![]() It started with this video guide from DrZzs: When I found out that I could build a bias lighting system for about $100 with a Raspberry Pi and no soldering, I jumped on it. I’ve always felt more comfortable with a Raspberry Pi because it’s a Unix system I know this. Also intimidating: flashing microcontrollers like the ESP32. ![]() I’ve also known that LED light strips are really cool to work with, but it’s been years since I soldered anything so it was all pretty intimidating. After using it for about a week I can say that yes, it does! Aside from looking cool, I’ve had some eye strain issues with my TV and heard that bias lighting could help with that. Again, cool, but not $300-and-tied-to-a-proprietary-system cool.īTW, the generic name for “Ambilight” is “bias lighting,” so I’m going to start writing that instead. Later, Philips launched the Hue Play HDMI Sync Box, which would let you create an Ambilight effect with Hue light strips. But it was always a “nice to have,” so when I was buying my TV I prioritized other features. They do what you see in that video: shine the edge colors past the TV. I’ve always thought that Philips Ambilight TVs were cool.
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