Category Archives: transistor

Powering Neon with a Joule Thief

Joule thief are small, fun circuits which exploit a few characteristics of electronics and LEDs in order to “steal” virtually all of the energy stored in a battery. They can operate at incredibly small voltages and are fairly simple to make. With a few modifications to this basic circuit it’s …read more

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Posted in joule thief, led, led hacks, neon, steampunk, toroid, transistor | Leave a comment

New Part Day: The Bizen Transistor

If we had a dollar for every exciting new device that’s promised to change everything but we never hear of beyond the initial hoopla, we’d own our own private islands in the sun from the beaches of which we’d pick out Hackaday stories with diamond-encrusted keyboards. The electronic engineering press …read more

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Posted in bizen, parts, semiconductors, transistor | Leave a comment

DIY Clapper Lets You Pick Your Components

One thing that always means the end of the year is close is the reappearance of TV ads for “The Clapper.” After all, who needs home automation when you can clap on and clap off? While we’re partial to our usual home automation solutions, [Utsource123] shows us that building a …read more

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Posted in 555, circuit design, clapper, dead bug, misc hacks, parts, transistor, trigger | Leave a comment

Building Video Pong With Discrete Components

Pong is a classic from the very dawn of the video game era. Recreating it remains a popular exercise for those new to coding. However, its simple logic makes this game particularly suited to an all-hardware build; something which [Glen] tackles with aplomb.

Not content to take the easy way …read more

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Posted in classic hacks, discrete, discrete logic, discrete transistors, transistor | Leave a comment

New Circuits with Old Technology

Before the invention of transistors, vacuum tubes ruled the world. The only way to get amplification or switching (or any electrical control of current) back then was to use tubes. But some tube design limitations were obvious even then. For one, they produce an incredible amount of heat during normal …read more

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Posted in amplifier, circuit, classic hacks, radio, transistor, vacuum tube | Leave a comment

Help Solve The Single-Transistor Latch Mystery

If you’ve spent any time on hackaday.io, you may have noticed that more than a few denizens of the site are fans of “alternative” electronic logic. Aiming to create digital circuits from such things as relays, vacuum tubes, discrete transistors, and occasionally diodes, they come up with designs that use …read more

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Posted in avalanche, hardware, latch, negative resistance, single transistor, transistor | Leave a comment

Retrotechtacular: How Not to Design With Transistors

Consider the plight of a mid-career or even freshly minted electrical engineer in 1960. He or she was perched precariously between two worlds – the proven, practical, and well-supported world of vacuum tube electronics, and the exciting, new but as yet unproven world of the transistor. The solid-state devices had …read more

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Posted in comparative, design, electrical engineering, electron tube, Hackaday Columns, Retrotechtacular, transistor, vacuum tube | Leave a comment

Bell Labs, Skunk Works, and the Crowd Sourcing of Innovation

I’ve noticed that we hear a lot less from corporate research labs than we used to. They still exist, though. Sure, Bell Labs is owned by Nokia and there is still some hot research at IBM even though they quit publication of the fabled IBM Technical Disclosure Bulletin in 1998. But today innovation is more likely to come from a small company attracting venture capital than from an established company investing in research. Why is that? And should it be that way?

The Way We Were

There was a time when every big company had a significant research and development …read more

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Posted in bell labs, Business, Featured, history, ibm, lockheed, Nobel, rants, skunk work, skunk works, transistor, Volta | Leave a comment

New Transistor Uses Metal And Air Instead Of Semiconductors

The more things change, the more things stay the same. Early electronic devices used a spark gap. These have been almost completely replaced with tubes and then semiconductor devices such as transistors. However, transistors will soon reach a theoretical limit on how small they can be which is causing researchers to find the next thing. If the  Royal Melbourne Institute of Technology has its way, we’ll go back to something that has more in common with a spark gap than a conventional transistor. You can find the source paper on the Nano Papers website although the text is behind a …read more

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Posted in nanotechnology, science, semiconductor, transistor | Leave a comment

You Can’t Build A Roland TR-808 Because You Don’t Have Faulty Transistors

That headline sounds suspect, but it is the most succinct way to explain why the Roland TR-808 drum machine has a very distinct, and difficult to replicate noise circuit. The drum machine was borne of a hack. As the Secret Life of Synthesizers explains, it was a rejected part picked up and characterized by Roland which delivers this unique auditory thumbprint.

Pictured above is the 2SC828-R, and you can still get this part. But it won’t function the same as the parts found in the original 808. The little dab of paint on the top of the transistor indicates that …read more

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Posted in drum machine, Ikutar Kakehashi, musical hacks, noise, noise circuit, roland, Roland TR-808, TR-808, transistor | Leave a comment