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7 items tagged "practice"
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6:01
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Hack a Day
Hackaday reader [svofski] wrote in to share a device he built, which would be useful to any ham operators out there trying to hone their CW skills. He calls his practice keyer the Morseshnik, and it is a combination of various items [svofski] found while digging through his parts drawer. He disassembled an old hard drive, [...]
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13:09
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Hack a Day
We must admit that we’ve been guilty of using a microcontroller to make two LEDs blink alternately in the past. It’s not the worst transgression, but it stems from our discomfort with analog circuits. Luckily, [Ray] published an illustrated guide on building multivibrator circuits. This is a simple method of assembling a two-output oscillator. All [...]
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15:11
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Hack a Day
Pace clocks are used in a variety of sports, from swimming to track. The systems are typically expensive however, often beyond the reach of smaller organizations and underfunded programs. For their electrical and computer engineering final project, Cornell students [Paul Swirhun and Shao-Yu Liang] set out to build a much cheaper alternative to commercial pace [...]
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12:00
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Hack a Day
Some say that handing out business cards is an antiquated practice due to the ubiquity of smart phones which can be used to trade or record contact information in mere moments. Instructables user [sponges] however, doesn’t agree and is pushing a “business card renaissance” of sorts with his POV business card. Hand-built in his basement, [...]
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6:15
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Hack a Day
[Leesam] tipped us off to this cool tutorial for shaping Polymorph. For those who haven’t, it is pretty cool stuff. It is a plastic that comes in little pellets. You can melt it down at relatively low temperatures and mold it to the shape you need. We’ve seen it used on several projects, most notably [...]