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DIY fume extractor for soldering safely
Soldering is essential for working with electronics, but the smoke from vaporizing flux isn’t something you want to breathe. CDC: rosin core solder details the risks, but you can reduce the hazards by...
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Exploring ternary logic: TNAND and TAND gates
Ternary logic circuits resemble binary logic circuits, but with three logic levels instead of only two. In this article I’ll build a TNAND gate and TAND gate, analogous to the binary NAND gate and AND...
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Exploring ternary logic: ternary logic probe
When working with digital circuits, a logic probe can be a very useful device. You can use the probe to quickly read logic levels of signals anywhere in a digital circuit.Although a multimeter can also...
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Building a 4-bit shift register from 7400 NAND gates for GPIO output port...
Building a 4-bit shift register from 7400 NAND gates for GPIO output port expansion on a Raspberry PiIn my various experiments with the Raspberry Pi, I’ve hit a limitation: the number of unused...
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4x7-segment LED display as a digital clock using two 74HCT595 8-bit shift...
This is a follow up to Building a 4-bit shift register from 7400 NAND gates for GPIO output port expansion on a Raspberry Pi, building a larger (16-bit) shift register to drive all of the LED segments...
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Voltage regulators revisted: LM317M, 7812, MCP170x, MIC5219, and ICL7660
Power is required by all electronic circuits, usually supplied by a voltage regulator. A wide variety of regulator integrated circuits are available, including the LM317, LM7812, MCP1700, MCP1702,...
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Reverse-engineering the pinout of vacuum-fluorescent displays (VFDs):...
Reverse-engineering the pinout of vacuum-fluorescent displays (VFDs): HNV11SS27, FIP7FM7, and HNV-08SS53Popular in DVD/VCR players, as in Salvaging a Samsung DVD-M101 Player: the vacuum fluorescent...
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Salvaging and organizing electrolytic capacitors
A brief follow-up to Organizing electronic components, in this article I’ll improve the organization of my electrolytic capacitors, and add to the stockpile by salvaging from an old DVD player circuit...
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A look back at nine months of blogging
In this 44th blog post of mine on Medium, I figured I’d take the opportunity to reflect on the articles written over the past nine months since I began. I’ll also include detailed statistics, in case...
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My experience with Kickstarter as a backer
Kickstarter is a popular crowdfunding platform, an American public-benefit corporation whose mission is to “bring creative projects to life”. Founded a decade ago in 2009, it has funded more than...
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