u/Alternative_Jaguar44

Hey r/diyaudio, just finished my latest budget audio project. I started with a super cheap 3-way Magnat speaker i found on eBay and decided to see how far I could push the case with a modern amplifier to turn it into an active Party speaker.

The power comes from a BRU5 TPA3255 based amplifier which can be bought from AliExpress for around 35€. I modified the internal crossover to utilize both channels of the amp allowing to control the woofer driver seperately with one of the two channels. The standard woofer was switched to a 6.5 inch subwoofer which together with the newly tuned port on the back (aprox. 48Hz) generates some pretty serious bass. Lastly i added an ESP32 running WLED MoonModules for two sound reactive LED strips on the front.

The whole thing sounds quite good especially thanks to the DSP settings allowing to bridge the natural gap in between the subwoofer and mid driver frequencies with equalizer settings and adjustable per channel output power.

For anyone looking at the BRU5 amp for a DIY build, i can highly recommmend it. The flexibility you get for the price is hard to beat.

Let me know what you guys think!

Hey r/SideProject,

I spend way too much time staring at glowing monitors, so I wanted a calm, physical way to track my travels and count down to my next trip without opening another app.

I built this custom EInk frame for my desk setup based on an ESP32 and a 7,5inch display. It connects to Wi-Fi and updates a few times a day to show:

• A map of the visited destinations (using the 249 ISO territories, which feels much more accurate for travel than just the standard 195 countries)
• A countdown to the next destination
• The current local weather at the destination

I absolutely love the paperlike aesthetic of EInk on my desk. It feels much more peaceful than a glowing LCD screen.

Right now, its just a personal project, but im considering polishing the code, getting a proper PCB made, and doing a small batch run if there is enough interest.

Would love your honest feedback, would you put something like this on your desk? What other data points would you want a travel display to show?

Hey r/eink,

Thanks again for the amazing response and feedback on my first post a few days ago! I spent some time tinkering with the code and the physical frame to implement your suggestions.

These are the updates:

1. As you recommended, I switched to a Robinson projection. Greenland is finally back to normal, and the map fits the 7,5 inch screen ratio so much better!
2. I updated the travel logic to 249 destinations instead of 195 countries in accordance with ISO 3166-1. From a travel standpoint this just makes a lot more sense.
3. Implemented circles for small countries and territories to get around the resolution limitation on the eink display. Thanks again for that tip!
4. Also adjusted the passe-partout so the ribbon cable at the bottom is finally hidden.

Really liking this frame and use case for eink displays! What do you guys think? Anything you would add or change?