Welcome to the N1IR Electronics Website. Totally off the cuff, one take, unrehearsed video projects for anyone interested in amateur radio, electronic design, makers, hardware hackers and science.


Get off you duff and build something!
Training the hand and mind since 1982.

Thursday, April 7, 2011

555 Timer Easter Egg? - Over Easy!

Greeting,
This is my video response to the 555 Timer Easter Egg by Dave Jones over at the EEVBLOG. I'm not toally sure how Dave got his to oscillate but my circuit is not. I've tried all sorts, used battery power reduced the voltage down way below spec, used different scope/probes, changes chips, but still can't duplicate Dave's problem. I've also had my whole senior class breadboard this circuit and all ten of them where fine, no oscillation. I'm at a loss on how to duplicate this. Check out the video, I have some other ideas what it might be. If you want to see me build the circuit check out Video 7 "Breadboarding - Pass the Flour?




Chip Info
NUMBER MANF. DATE CODE
LM555CN National JR34AD
7555IN NXP 9E1K410 UnG946D
LM555CN Fairchild K233