Introduction: POV on Basic Stamp

By Justin Shaw

I was surprised when I could not find any persistence of vision projects on the web using a basic stamp.

Initially I used a piezo speaker to beep each time the pov pattern was complete. This allows you to synchronize your waving motion with the message display. The final pov implementation uses a Memsic accelerometer to figure out when to reverse flash order.

Step 1: Build the Circuit

I used the integrated bar LED DIP, but a row of single LEDs should work just fine.

Step 2: Code the BS2

Edit pov.bs2 with your pattern and upload to the basic stamp. The code should not be difficult to figure out. The piezo version is still supported: set USE_MEMSIC to 0. The light pattern can be found in the DATA directive near the bottom of the file.

Attachments

Step 3: Give 'er a Whirl

For extra credit, design a simple switch out of a banjo string to detect the direction changes! As in http://www.makezine.com/blog/archive/2006/05/make_podcast_ken_murphys_blink.html Ken Murphys Blink. Let me know if you make any improvements!