Working through the Art of Electronics chapter on #Oscillators. I'd like to try out each of the designs on paper, in #simulation, and on the bench. As the first installment I chose the phase-delay oscillator (#PDO).

Oscillation occurs when a system meets certain 'criteria.' It's beautiful to observe the moment when these criteria are met. Here's an #audio frequency
implementation of a PDO from Wes Hayward, built with Dwight Aplevich's #circuit_macros.

m4 source: https://codeberg.org/rjp/diy-tm/src/commit/16fe0654c70797a3195af976e57d39b12fcb00e4/pdo/osc.m4

New paper!
We know that, in systems of phase oscillators, solitary states can appear as the system undergoes a transition from disordered behaviour to synchronous motion. But did you know that, in models of spiking neurons, they can appear in both directions of the transition? In this work, we show you how this happens.

https://journals.aps.org/pre/abstract/10.1103/xtgc-f766

#physics #mathematics #dynamics #oscillators #neurons #synchronization #networks #higherorder

#Oscillators again.

Is the MCU datasheet wrong?

It says:

CLXTAL1 = CLXTAL2 = 2*(CLOAD - CS)
For CLOAD, it is crystal/ceramic load capacitance, [...] For CS, it is PCB and MCU pin stray capacitance.

Okay. Then I found AN100 from TI which uses the classic:

CLOAD = C1*C2/(C1+C2)

If I assume that C1 includes both the cap and stray capacitance, I get:

Ccap = 2CLOAD - CS

That's a difference of a whole CS!

Where's the mistake?

#electronics #Microcontrollers #askfedi #pcbdesign

A tiny way to compute a square / triangle wave at the same time without conditionals, only basic arithmetic and shifts.

This can be used for #oscillators or animations etc. #algorithm is a variant of HAKMEM 149.

Can also be used to draw a square. (And other shapes, see previous toot)

Code also shows how to draw a diamond shape by rotating the square by 45°.

There are two versions, optimized for size and optimized for speed.

#computergraphics #p5js #softwarerendering #codegolf #sizecoding

Neuronal dynamics can be #balanced
without the need of strong external currents, as usually assumed, here with A. Politi we explain how this can work thanks to #short term #depression (open access article 2024)

#neuroscience #computationalneuroscience #balance #neuralnetwork #oscillators

https://pubs.aip.org/aip/cha/article/34/4/041102/3283544/A-robust-balancing-mechanism-for-spiking-neural

In ancient times, people built some rather large and elaborate contraptions for measuring and reacting to the passage of time.

The discovery of electricity and the invention of electronics made this task dramatically easier. Instead of a big, unwieldy mechanical device, a simple electrical circuit could be used to generate a periodically oscillating signal.

Numerous devices, including radio, television, and computers, were made possible by these electronic #oscillators.

#clock

#Nanomechanical #oscillators could be used to build ultrasensitive sensors and to test macroscopic quantum phenomena. A scheme offers potential for order-of-magnitude improvements, the researchers say. #nanotechnology

https://physics.aps.org/articles/v17/s38?utm_campaign=weekly&utm_medium=email&utm_source=emailalert

GVST GSinth2 is a free VST synthesizer plug-in.

It has 3 oscillators with independent settings that can be used to create interesting sounds. Randomize buttons allow for quick experimentation with sounds.

https://www.gvst.co.uk/gsinth2.htm

#linux #GSinth2 #vst #synthesizer #oscillator #oscillators