Ask HN: What have you made with Raspberry Pi?

My COVID project was DCSkyCam[1], which is on a Pi4 with the HQ camera to do sunrises/sunsets, and uses TFLite and other packages for object detection and identification of helicopters that fly by. I also have a Pi 3B running pihole[2] and running custom scrape jobs to alert me of certain website updates, which I’d like to transition to using selenium but the 3B is too slow for chromedriver - might upgrade to a Pi 5 if I can.

[1] https://dcskycam.net [2] https://pi-hole.net/

I have some olds Macs lying around and can't install Tailscale on older OSes. I got a Pi02W working as Tailscale subnet[0], so I can access all my devices on LAN remotely.

[0] https://tailscale.com/kb/1019/subnets?q=Subnet%20routers

I'm using a pi as a firewall between my house and a 30 meter ethernet cable to my shed.

I wanted ethernet to my shed but found that physical security of ethernet was a little pricey. I'm using an old pi, a cheap ethernet dongle I got in lild in a sale and ipfire to create an isolated network in the shed.

I made a smart pinewood derby track. Used a reed switch to start a timer on release of the cars and ultrasonic distance sensor to stop the timer when the first car crossed the finish line. Displayed the data on a TV mounted above the finish line. That was a fun project.

Part of an FRC team building a Vision system from scratch, quite fun and nearly complete, just need to recalibrate some angle formulas

I made a Pi Zero into a game console emulator, and stuffed it in an old Nintendo cartridge.

An RPi 3 runs my Halloween and Christmas displays.

Transformed a TV into a smart one using DietPi + Kodi, it can do more than what off-the-shelf smart TVs can.

Lots of stuff on lots of pi’s :

Kodi

Timelapse photo

Camera monitor a mousetrap with motion detection

Various small robot project with my kids.

Pihole

Minecraft server

Various sensors.

a player that plays a chosen playlist as a morning alarm. working on some vision stuff now.

web server plus UPS controller.

home surveillance network