Category Archives: parts

A Friendly Reminder That You Might Be In Danger

Product recalls are one of those things that most people don’t pay attention to until things get really bad. If it’s serious enough for somebody to get hurt or even die, then the media will pick it up, but most of the time they simply pass by in silence. In …read more

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Posted in CircuitPython, live feed, Microcontrollers, parts, product recall, PyPortal | Leave a comment

3D Printed Fan Filter Takes Cues from Costume Scene

This custom fan filter created by [Kolomanschell] is a clever application of a technique used to create wearable 3D printed “fabrics”, which consist of printed objects embedded into a fine mesh like a nylon weave. The procedure itself is unchanged, but in this case it’s done not to embed 3D …read more

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Posted in 3d printed, 3d Printer hacks, fabric, fan cover, fan filter, fan grill, mesh, parts | Leave a comment

High-Tech Alms Collection With The ESP32

In an ideal world, shop space, tools, and components would be free. But until we get to that Star Trek utopia, hackerspaces will have to rely on donations from the community to help stay afloat. While asking for money, at least you can have some fun with it if you …read more

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Posted in coin acceptor, donations, ESP32, hackerspace, LoRa, Microcontrollers, parts | Leave a comment

The Basics Of SCRs

Although the silicon controlled rectifier or SCR has been around since 1957, it doesn’t get nearly the love an ordinary transistor does. That’s a shame because they are quite handy when it comes to controlling AC and DC voltages in things such as lamp dimmers, motor speed controllers, and even …read more

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Posted in parts, scr, Silicon Controlled Rectifier, thyristor | Leave a comment

New Part Day: This $10 Rocking Single Board Computer Does Everything You Want

Single board computers are great, but what we really need are cheap single board computers. Running Linux on anything isn’t as good as running Linux on everything, and all that. To that end, here is the Rock Pi S, a $10 single board computer with Ethernet, WiFi, and it costs …read more

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Posted in news, parts, rock, Rockchip, RockSBC, RockSBS S, USB C | Leave a comment

Modeling The Classic 555 Timer On A Breadboard

Over the years, readers have often commented that microcontrollers (or more specifically, the Arduino) are overkill for many of the projects they get used in. The admonition that the creator “Should have used a 555” has become something of a rallying cry for those who think modern electronic hobbyists are …read more

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Posted in 555 timer, 74ls00, classic hacks, lm358, model, parts, square wave | Leave a comment

Component Shelf Life: How To Use All That Old Junk

There are two types of Hackaday readers: those that have a huge stock of parts they’ve collected over the years (in other words, an enormous pile of junk) and those that will have one a couple of decades from now. It’s easy to end up with a lot of stuff, …read more

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Posted in antique parts, components, Hackaday Columns, hardware, parts, pcbs, shelf life, smd components | Leave a comment

Making The World’s Fastest 555 Timer, Or Using A Modern IC Version

If you’re not familiar with the 555 timer, suffice it to say that this versatile integrated circuit is probably the most successful ever designed, and has been used in countless designs, many of which fall very far afield from the original intent. From its introduction, the legendary 555 has found …read more

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Posted in 555, Hackaday Columns, hardware, parts | Leave a comment

This Vintage Op-Amp Opens A Fascinating Window Into Semiconductor History

We have covered enough of the work of [Ken Shirriff] on these pages to know that when he publishes something, it will be a fascinating read and work of the highest quality. And so it is with his latest, a very unusual op-amp on which he performs his usual reverse …read more

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Posted in bob pease, classic hacks, jean hoerni, op-amp, parts, teardown | Leave a comment

E-Ink Price Tags Fall Off Store Shelves Onto Your Workbench

There’s always a magic moment for our community in the lifecycle of any piece of technology: the point at which it first becomes available for pennies on the surplus market. Something which could previously be had only at a price is rendered down to mere pennies, and we are free …read more

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Posted in e-ink, e-ink display, e-ink price tag, parts | Leave a comment