Sign up for the Design News Daily newsletter.
Guido Had a Strong Aversion to Overbrewed Oolong
DN Staff
June 27, 2005
2 Min Read
For Guido Vollmar's complete instructions on how to build your automatic tea timer, click here. To view pictures and a schematic diagram of the tea timer, click here. |
In search of the perfect cuppa, Guido engineered this simple, battery-operated tea timer with a built-in LED display. Just fix a tea-bag on the mechanism's extension arm, place a cup of hot water beneath it, and push a button according to the desired brew time. The microcontroller-operated, 5V circuit provides a servo motor with control pulses to lower and raise the extension arm. The brew process can be interrupted via a stop button, while the power supply is switched off automatically via FET.
Tea Timer Parts List
Amt | Part Description | Allied Part # |
|---|---|---|
1 | 9V Battery | 737-0530 |
2 | 100 nF Capacitor | 881-5228 |
1 | 330 pF Capacitor | 881-5182 |
1 | 10 muF Capacitor | 852-7072 |
1 | 470 muF Capacitor | 852-6592 |
2 | BAV 100 Diode | 431-0452 |
1 | 400 mA Fuse | 740-5209 |
2 | Fuse Clips | 846-6062 |
1 | LM317T | 288-1251 |
1 | Yellow LED | 782-0040 |
1 | NC Slider | 870-9934 |
4 | NO Push Button | 948-7199 |
1 | Transistor BC846 | 263-0418 |
1 | Si 9430DY MOSFET | 307-1057 |
About the Author(s)
You May Also Like
Editors' Choice
Jun 4 - Jun 6, 2024
Jun 4 - Jun 6, 2024
Innovation in automation starts here. Discover and collaborate on automation solutions that are revolutionizing the entire production lifecycle — from design to production to market — and sharpen your competitive edge. ATX South is part of IME South, a six-in-one expo offering the latest insights & solutions spanning medtech, packaging, automation, plastics, design, & processing.
Register Now