Showing posts with label logic chip. Show all posts
Showing posts with label logic chip. Show all posts
Monday, March 30, 2015

@MAKE Electronics Experiment 23: Nice Dice

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This is an interesting and challenging experiment. Challenging because I sometimes have problems getting from schematics to breadboards, an...
Saturday, March 21, 2015

@MAKE Electronics Experiment 22: DeBouncing and Flip-Flop

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This experiment is deceptively straightforward. The only issue I had was a bad chip. First, I mentioned in the last experiment that the sl...
Tuesday, March 17, 2015

@MAKE Electronics Experiment 21: Game Show Button Controller

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After the last experiment this one is pretty straightforward. One 74HC32 quad OR chip, 2 timers, one SPDT switch, 2 tactile buttons, 2 LEDs,...
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...
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...
Sunday, February 1, 2015

@MAKE Electronics Experiment 19 - logic chips (Part IV)-Latching with a NAND

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Moving on with logic chips, I figured out that I could also latch my gates with the NAND chip, using the "Active-low circuit: Both inpu...
Saturday, January 31, 2015

@MAKE Electronics Experiment 19 - logic chips (Part III)-Latching with a NOR

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At the end of the chapter, Charles shows how to latch an AND gate to HIGH by putting a diode between the output and input 2, which goes to a...
Friday, January 30, 2015

@MAKE Electronics Experiment 19 - logic chips (Part II)

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I still do not have the 74HC08 AND chips, so I moved ahead and used what I have.  I took out the 00 and replaced it with a 74HC02 NOR chip. ...
Thursday, January 29, 2015

@MAKE Electronics Experiment 19 - logic chips (Part I)

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There is not much to Experiment 19, but it's still really neat. This is the first use of logic chips, and Charles is just introducing ...