Coffeepot Microcontroller
#Design Choices
| Atmega328 (Aurdiuno) | LPC800 Series | |
|---|---|---|
| Cost per unit (quantity 10) | $3.12 | $1.60 |
| Cost per unit (quantity 100) | $2.84 | $0.99 |
| Cost per unit (quantity 1,000) | $1.69 | $0.69 |
| Pro | Super easy to program | Super cheap |
| Con | Slightly more expensive | Harder to Program |
| Requires special device to load code onto it |
| CC3000 (Wifi) | CC2541 (Bluetooth) | |
|---|---|---|
| (quantity 10) | $20.58 | $12.94 |
| (quantity 100) | $17.49 | $11.09 |
| (quantity 1,000) | $13.29 | $8.93 |
| Pro | Be able to always be connected to the network. This allows for an app that doesn’t require the phone to be near by to use. Coming home from a long day at work, you could go on the app to turn on your coffee maker so it is hot and ready when you get home. | Cheaper and slightly simpler to configure and set up. |
| Con | More expensive than the Bluetooth option. Requires a little bit more software to configure. Though this is done with smartconfig, a package that can be loaded into an iphone or android app | Requires a phone with Bluetooth to be nearby. |
This is used to keep track of time, so alarms can be set.
[Reference Design] (https://www.sparkfun.com/products/99)
Use a digitial signal to open and close a VAC power line
[Reference Design] (https://www.sparkfun.com/products/11042)
Used to power the board.
Instead of trying to develop a custom solution for prototype board, the plan is to instead gut a cheap USB wall wart. This will enable the design to be safer and cheeper as the USB wall warts are produced at a much larger scale.
[Product Choice] (http://www.monoprice.com/Product?c_id=112&cp_id=11213&cs_id=1082603&p_id=8857&seq=1&format=2)
- Oscillator for the clock
- Oscillator for the microcontroller
- Diagnostic LEDs
- Programming port
- various SMD components