View Full Version : Non Working Parallax Protoboard

05-08-2008, 07:04 AM
I seem to have fried 2 protoboards seem to be working with the propeller tool but won't run from ram and won't retain program in eeprom.

Is the main prop chip dead or otherwise ?

Thank You


05-08-2008, 07:28 AM
try a simple toggle program without using the pll. the pll is the first thing to fry, typically...

Paul Baker
05-08-2008, 07:53 AM
Follow Raymond's advice, it does sound like you have damaged the PLL. What circuits are you connecting to the protoboard? Are any of them inductive (solenoid, motor,...)?

Paul Baker (mailto:pbaker@parallax.com)
Propeller Applications Engineer
[/url][url=http://www.parallax.com] (http://www.parallax.com)
Parallax, Inc. (http://www.parallax.com)

05-08-2008, 08:42 AM
I've been using the boards with no problems, this time both boards failed with interfacing a GPS and the GPio object. I used a ds275 to convert fron rs232 via a 1.0k resistor onto the prop.