I am creating a development blog following the dicussion here: Let's Design 2 : The LED shake light


The idea is to showcase the process of collaboration and design in an easy to follow series.


From the original post:


I want to make a  device that, when it is shook, it will turn on a LED. Shook again, and  it turns off the LED. I would like to add other features, like varying  light patterns, but let's address the base issue of turning on one  light.

 

The requirements :

1. When it senses a  shake, it turns on or off depending on the prior state.

2. The final device  must be small, 1 inch square would be ideal.

3. Should run off of a  small battery. Rechargeable cell or capacitor preferred.

4. Idle, stand-by time,  should last a few weeks to a month.

5. No mercury switches either, or any  poisonous substances.

 

Let's get started!

 

Cabe

 

 

After a few replies, I decided to use the PIC 10F222 and a tilt switch for the project. (Thanks Westie)

I bought the following for the project:

1. PIC  10F222Add to Parts ListPIC 10F222: part # 31K4983

2. Tilt/Motion  SensorAdd to Parts ListTilt/Motion  Sensor: part # 73R7787

 

And came up with this preliminary circuit:

10f222+tilt.JPG


The next step is to start writing code.


Any and all help would be appreciated. As a community, we can knock this out pretty quick. We have to show off our bonafides, or face scrutiny of merit.

 

Cabe


 

Check out another design project finished with the help of the community.