Rob Oplawar
May 4th, 2007, 05:34 PM
Actually, mine cost about $70 I think.
http://www.spacebrick.net/pictures/blog_gallery/clock.jpg
It contains:
30 resistors,
18 capacitors,
62 LEDs (only 48 of them are used though),
2 pushbuttons,
14 7400 series chips (5 4 bit counters, 3 7-segment coverters, 1 oscillator chip, 2 NAND chips, 1 OR chip, 1 AND chip, and 1 NOT chip),
and at least 40 feet of small gauge wire
And that's not counting the power supply which has its own simple complexity, and I built that too.
Not that it's all that difficult to build a digital clock, but before taking the class I took this semester I had absolutely no electronics experience, so it's really gratifying to see the thing work in the end. It's a pretty common deal for colleges to offer an intro to electronics course in which you build a clock, and although it's the most expensive and crappy digital clock you've ever seen, it's totally worth it to know exactly how it works, so I highly reccommend it to all of you.
The back side:
http://www.spacebrick.net/pictures/blog_gallery/clock2.jpg
I'm not very tidy with my wires =P
oh and in the parts list I included the debounce circuit for the switches, which I hadn't added yet when I took the pictures.
http://www.spacebrick.net/pictures/blog_gallery/clock.jpg
It contains:
30 resistors,
18 capacitors,
62 LEDs (only 48 of them are used though),
2 pushbuttons,
14 7400 series chips (5 4 bit counters, 3 7-segment coverters, 1 oscillator chip, 2 NAND chips, 1 OR chip, 1 AND chip, and 1 NOT chip),
and at least 40 feet of small gauge wire
And that's not counting the power supply which has its own simple complexity, and I built that too.
Not that it's all that difficult to build a digital clock, but before taking the class I took this semester I had absolutely no electronics experience, so it's really gratifying to see the thing work in the end. It's a pretty common deal for colleges to offer an intro to electronics course in which you build a clock, and although it's the most expensive and crappy digital clock you've ever seen, it's totally worth it to know exactly how it works, so I highly reccommend it to all of you.
The back side:
http://www.spacebrick.net/pictures/blog_gallery/clock2.jpg
I'm not very tidy with my wires =P
oh and in the parts list I included the debounce circuit for the switches, which I hadn't added yet when I took the pictures.