Say "Thank You" in a fun and interactive way with this money-sensing tip jar. Whenever someone drops in a tip, the LED matrix at the back of the jar will reward them with a fun animation and some heartfelt gratitude.
This is a fairly easy build, using an upcycled snack jar to collect your bountiful tips and powered by a Matrix Portal M4 board plugged into the RGB matrix of your choice. Use our premade images or upload your own animations to make a custom "thank you" message for your most generous customers.
This is a beginner project that doesn't require any soldering - you just need a screwdriver, some cutting tools, and some strong tape. I've also included an option that uses soldered headers for a slightly more secure build.
A plastic jar with a lid, large enough to hold ALL the tips.
Choose the RGB Matrix size that best fits your jar. You can see all the different sizes here. I used the 4mm pitch 64x32 size.
You'll also need a Time of Flight sensor. This is a very cool little sensor that uses a laser to detect proximity, and works within a really tiny range of a few millimeters.
Be sure to get one of the suggested cables to attach it to your Matrix Portal as well. Check out the "Add the Sensor" page for more details.
- Goo-gone or other solvent to remove any labels
- Box knife, rotary tool or saw to cut the plastic jar
- Rotary tool or heat tool to cut the lid
- Soldering iron if you're using the header-attachment method for the sensor (not needed if you're using the STEMMA plug-in cable)
- Gaffer's tape or other strong tape
- LED diffusion panel (optional)