555-Based Square-Wave and Triangle-Wave Function Generator Build for Beginners https://hackaday.com/2026/02/07/555-based-square-wave-and-triangle-wave-function-generator-build-for-beginners/
#Hardware #Howto #555timer #Functiongenerator #Squarewave #TL082opamp #Trianglewave

555-Based Square-Wave and Triangle-Wave Function Generator Build for Beginners

https://fed.brid.gy/r/https://hackaday.com/2026/02/07/555-based-square-wave-and-triangle-wave-function-generator-build-for-beginners/

Wah - Widespread Noise

noise and beach

#noise #widespreadnoise #heathkit #squarewave #drone #beach #keywest #odd #funnynotfunny #hum

Feelings from Widespread Noise

Square wave from the Heathkit.

#squarewave #heathkit #noise #drone #weird #wtf #why #stop #noahpeterson #widespreadnoise

Echoes from Widespread Noise.
Square wave manipulation via the Heathkit.

#squarewave #widespreadnoise #noahpeterson #echoes #noise #noisemusic #statues #greek #art #special

#SQUAREWAVE

I found a Yamaha PortaSound PSS-80 at Goodwill the other day for just a couple bucks and it can do all the amazing stuff THIS dude does with it in this video. 🤯

I gotta hook it up and mess around with it more.

https://youtu.be/9dB1ke7wT5Y

#keyboard #keyboards #yamaha #synth #synths #squarewave #synthesizer #synthesizers #80s #80sSynth #PortaSound #GoodwillFinds #OldSynth #OldSynths

"How I created the perfect NES sound chip" https://youtu.be/8RrQrATnXXY #chiptune #squarewave

@atomicpoet Agreed, #SuperPuzzlePlatformer is awesome!

Also, Andrew Morrish is working on #Squarewave now, which he described as a "spiritual successor" but "redesigned from the ground up". VERY excited for that! 🤩

I'm doing this tape this afternoon:

From 1985, some computer music I did on our apple //e. I have quite a few of those tapes, some more interesting than others from 1983 to 1986.

This one has nice synthetic sounds, thanks to my sound routine that would play on the cassette port instead of the speaker, and a radio shack mono echo for effect. Tape "borrowed" from my dad, no doubt.
#appleII #composition #music #algorithm #stochasticmusic #cassette #Basf #retrocomputing #squarewave #digital #synth

Arguably some of the most satisfying synth sounds can be found in this track

https://www.youtube.com/watch?v=0nnqGDZnWhU

#boardsofcanada #synths #squarewave #sinewave #trianglewave #moog

Custom Christmas Light Controller Blocks Blinks

Finding that his recently purchased LED Christmas lights defaulted to an annoying blinking pattern that took a ridiculous seven button presses to disable each time they were powered up, [Matthew Millman] decided to build a new power supply that keeps things nice and simple. In his words, the goal was to enable “all lights on, no blinking or patterns of any sort”.

Connecting the existing power supply to his oscilloscope, [Matthew] found the stock "steady on" setting was a 72 VAC peak-to-peak square wave at about 500 Hz. To recreate this, he essentially needed to find a 32 VDC power supply and swap the polarity back and forth at the same frequency. In the end the closest thing he could find in the parts bin was a HP printer power supply that put out 30 volts, so the lights aren't quite as bright as they were before, but at least they aren't blinking.

To turn that into a pair of AC square waves, the power supply is connected to a common L298 H-Bridge module. You might expect a microcontroller to show up at this point, but [Matthew] went old school, and created his two alternating 500 Hz square waves with a 555 timer and a 74HC74D dual flip-flop.

Unfortunately, he didn't have the time to get a custom PCB made before Santa's big night. Though as he points out, since legitimate L298s are backordered well into next year anyway, having the board in hand wouldn't have helped much. The end result is that the circuit has to live on a breadboard for the current holiday season, but hopefully around this time next year we'll get a chance to see the final product.

#ledhacks #555timer #74hc74d #hbridge #powersupply #squarewave

Keep Coffee Warm Through Induction Heating

Transformers have an obvious use for increasing or decreasing the voltage in AC systems, but they have many other esoteric uses as well. Electric motors and generators are functionally similar and can be modeled as if they are transformers, but the truly interesting applications are outside these industrial settings. Wireless charging is essentially an air-core transformer that allows power to flow through otherwise empty space, and induction cooking uses a similar principle to induce current flow in pots and pans. And, in this case, coffee mugs.

[Sajjad]'s project is an effort to keep his coffee warm while it sits on his desk. To build this special transformer he places his mug inside a coil of thick wire which is connected to a square wave generator. A capacitor sits in parallel with the coil of wire which allows the device to achieve resonance at a specific tuned frequency. Once at that frequency, the coil of wire efficiently generates eddy currents in the metal part of the coffee mug and heats the coffee with a minimum of input energy.

While this project doesn't work for ceramic mugs, [Sajjad] does demonstrate it with a metal spoon in the mug. While it doesn't heat up to levels high enough to melt solder, it works to keep coffee warm in a pinch if a metal mug isn't available. He also plans to upgrade it so it takes up slightly less space on his desk. For now, though, it can easily keep his mug of coffee hot while it sits on his test bench.

Thanks to [Jerry] for the tip!

#cookinghacks #coffee #frequency #heater #induction #metal #mug #resonance #squarewave #transformer

I covered it here live, but here's a writeup on the #bitmex "maintenance" debacle from last night, for those that don't want to scroll back so far -- https://blockmanity.com/news/bitcoin-climbs-400-bitmex-goes-maintenance-bitcoin-shorts-reached-time-high/ #trading #clowncarexchanges #squarewave