My Virtual Life
Showing posts with label
74HC08
.
Show all posts
Showing posts with label
74HC08
.
Show all posts
Sunday, March 15, 2015
@MAKE Electronics Experiment 20: Keypad Security System Epilogue Part II: Making it Work
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Getting past the fact that the 555 won't supply enough voltage, ever, the next question is how can we amplify it. The answer is with a t...
Friday, March 13, 2015
@MAKE Electronics Experiment 20: Keypad Security System (Part III--still not working)
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This has taken a while. Snow, family visiting, setting up my new generator, an fuel oil spill in my basement, and other events have dominate...
Wednesday, February 18, 2015
@MAKE Electronics Experiment 20: Keypad Security System (Part I)
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Experiment 20 builds on the logic chip exercise in #19 to build a keypad security system. The full experiment ends with hacking into a compu...
Friday, February 6, 2015
@MAKE Electronics Experiment 19 - logic chips (Part V)-Finally got my AND chips--more latching
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My first post on this experiment said that there isn't much too it. I was wrong. Because, to paraphrase Donald Rumsfield, I had to exp...
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