Automatic Tea Maker
I am scatterbrained. I like to drink hot tea. Oversteeped tea gets bitter. I am easily distracted.
The natural choice was to (over)engineer something with inexpensive hobby-grade electronics. Automatic tea timers are hardly new and people have made them from discarded toasters and K’Nex which I have a lot of respect for. People on this site have been making them with Arduinos and Servos for a long time so I’m hardly the first. This project has three major differences though.
Uses a text display
Clips on the cup rather than free standing
3D printed for a finished look
Due to the printed parts the MATERIALS list is short. Most of the parts can be found on eBay very inexpensively.
16×2 LCD character display
5V Arduino Mini
9g servo motor
Normally open (NO) switch
3 position rectangular male header pins
4-40 threaded rod or metric equivalent
4 @ 4-40 3/8″ bolts
12 @ 4-40 nuts or metric equivalent
2 @ 3mm bolts which are at least 6mm long
2 @ 3mm nuts
2 @ 5mm bolts which are lat least 12mm long
2 @ 5mm nuts
2 @ #4 wood screw
Male USB plug with cord
Small gauge wire
There are a minimal amount of TOOLS necessary for this build
Computer for printing and programming
Small screwdriver for small bolts
Programming board for Arduino Mini
This project requires you to know how to solder and send a program to an Arduino Mini. The program has already been written so you don’t need to write any code. There are plenty of instructions for doing both these things so I won’t go into them here. This is a big change from my tCDS unit which had 72 steps and didn’t rely on previous skills.
Step 1: Start Printing
Picture of Start Printing
There are two files to print. The first is the parts which do the tea dipping. The second file is for the enclosure. The enclosure isn’t strictly necessary and if you chose to construct a wooden enclosure that would add a welcome touch of class to this project.
STL model for parts
STL model for enclosure
The source code for these files can also be found on my blog. Just check out the final posting of this project and look for the links at the bottom of the page. These links will open new windows or tabs.
For more detail: Automatic Tea Maker
From Schematic to PCB Production, Just Need One Tool
Free Circuit Design Software: learn to use Editor quickly and easily
Cheapest PCB: 10pcs 2-layers 10cm×10cm only $8.21, 3-day build time, 100% E-test