Category Archives: 555

Random Numbers From Outer Space

Need a random number? Sure, you could just roll a die, but if you do, you might invite laughter from nearby quantum enthusiasts. If it’s truly, unpredictably random numbers you need, look no farther than the background radiation constantly bombarding us from the safety of its celestial hideout.

In a …read more

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Posted in 555, classic hacks, decade counter, Geiger tube, muon, nixie, random number, random number generator | Leave a comment

Make A Mean-Sounding Synth From Average Components

A while back, [lonesoulsurfer] stumbled upon a mind-blowing little DIY synth on YouTube and had to make one of his own. We don’t blame him one bit for that, ’cause we’ve been down that cavernous rabbit hole ourselves. You might want to build one too, after you hear the deliciously …read more

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Posted in 555, cd40106, CdS cell, moog, musical hacks, photocell | Leave a comment

Drive A Plasma Ball With An ATV Ignition Coil And A 555

[Discrete Electronics Guy] sends in his short tutorial on building a high voltage power supply from simple things.

The circuit is a classic, but we love the resourcefulness shown. The ignition coil comes from a three wheeler, the primary power supply is a ATX supply from a computer and the …read more

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Posted in 555, high voltage, how-to, ignition coil, plasma bulb | Leave a comment

Hackaday Podcast 042: Capacitive Earthquakes, GRBL on ESP32, Solenoid Engines, and the TI-99 Space Program

Hackaday Editors Elliot Williams and Mike Szczys talk turkey on the latest hacks. Random numbers, art, and electronic geekery combine into an entropic masterpiece. We saw Bart Dring bring new life to a cool little multi-pen plotter from the Atari age. Researchers at UCSD built a very very very slow …read more

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Posted in 555, 5g, earthquake, earthquake detector, entropy, Grbl_ESP32, Hackaday Columns, kerbal space program, podcast, Podcasts, soft robotics, speaking clock, TI-99 | 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

A Capacitive Soil Sensor Hack For Lower Voltage Supplies

A frequent beginner project involves measuring soil moisture levels by measuring its resistance with a couple of electrodes. These electrodes are available ready-made as PCBs, but suffer badly from corrosion. Happily there is a solution in the form of capacitive sensor probes, and it is these that [Electrobob] is incorporating …read more

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Posted in 555, capacitive sensor, green hacks, moisture sensor, soil sensor | Leave a comment

A Baby Named DJ

Some of us are guilty of picking up questionable hardware from garage sales, fleamarkets, and well-meaning relatives. There is a balance between turning down a good investment and hoarding, and if we figure out how to tell the difference you will be the first to know. [Clem Mayer] may start …read more

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Posted in 555, 555 audio, 555 timer, analog audio, analog circuitry, circuit bending, drum machine, how-to, music, musical hacks, synthesizer | Leave a comment

Fizzle Loop Synth Does It With 555 Timers

For every project that uses an Arduino to make soup or an ESP8266 to hash bitcoin, there’s always someone out there uttering the same old refrain. I could have done it with a 555. More often than not, this is true, even if it is tangential to the discussion being …read more

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Posted in 555, groovebox, musical hacks, noisebox, synth | Leave a comment

The Three Faces Of The 555

In these days of cheap microcontrollers, it is hard to remember there was a time when timing things took real circuitry. Even today, for some applications it is hard to beat the ubiquitous 555 timer IC. It is cheap, plentiful, and reliable. What’s interesting about the 555 is it isn’t …read more

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Posted in 555, astable, Bistable, hardware, monostable | 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