Re: One very bright unresponsive row on Peggy 2

Home Evil Mad Scientist Forums LED Matrix Kits One very bright unresponsive row on Peggy 2 Re: One very bright unresponsive row on Peggy 2

#20721
Windell Oskay
Keymaster

>Using the continuity tester on my multimeter, when powered on, the + and – leads of the LEDS on Row 1 are continuous. 


I’m not sure what you mean by “continuous” here.  The square-hole sides are connected together in every row, and the round-hole sides are connected together in every column.

>Row 1 is not ALWAYS all lit.  When the device is powered on, an apparently random pattern of LEDS in Row 1 sometimes light (usually in blocks of three or four) with a few LEDS in between not lit  My earlier statement that the LEDS show no response at all to the sketch may be incorrect.  I can see them flickering slightly but they are so bright it’s hard to be sure.

Have you finished building the Peggy yet, or are you still trying to debug it while building?  If there’s a pattern in the behavior, it is likely to reveal itself more clearly when all of the LEDs are in.  And, if something is flaky, try wiggling the different components to see if the transistor or one of the chips has an intermittent connection.