When Does Impedance Matching a PCB Trace Become Unavoidable? - A common joke in electronics is that every piece of wire and PCB trace is an anten... - https://hackaday.com/2023/08/27/when-does-impedance-matching-a-pcb-trace-become-unavoidable/ #impedancematching #pcbrouting #impedance #hardware #science #route #pcb

The Dipole Antenna Isn’t as Simple as it Appears - Dipole antennas are easy, right? Just follow the formula, cut two pieces of wire, ... - https://hackaday.com/2023/08/16/the-dipole-antenna-isnt-as-simple-as-it-appears/ #radiohacks #wavelength #bandwidth #frequency #impedance #resistive #reactive #antenna #dipole #vna

Meh. What's the #impedance of a #RaspberryPi #GPIO pin in input mode? Is it safe for a high value from another pin in output mode to sink directly to it?

I haven't found this discussed anywhere. It 𝘭𝘰𝘰𝘬𝘴 as though a pin in input mode has quite a high 𝑍 and sinks very little current, but I don't want to experiment just in case that's an invalid conclusion. 😔🤔

In an other life I did a lot of #RF Radio Frequency work. Transmission line principles were bread and butter.

This #article explains a lot in a small space. Recommended.

https://www.allaboutcircuits.com/technical-articles/introduction-to-impedance-matching-using-transmission-line-elements/

It makes use of a #SmithChart, one of the cleverest bits of maths I know. There is a link on the page I gave that jumps to an equally good explantation of smith charts.

#Electronics #Mathematics #Impedance #Radio #RadioTheory #Calculation

And it's friday again, time for #newstodon. Established by @TexasObserver to promote great work from some of the newsrooms here in Mastodon.

This time with an article from @ghonsel:

Longer life for used batteries

Many old batteries can be saved by replacing individual cells. A new process makes it possible to assess more quickly whether this is worthwhile.

https://www.heise.de/hintergrund/Longer-life-for-used-batteries-7524658.html?wt_mc=sm.red.ho.mastodon.mastodon.md_beitraege.md_beitraege

#Battery #Batteryrecycling #EU #Electronicwaste #Environment #Impedance #Recycling #Refurbished

This evening's work. Install new patchbay. Hook up effects. Getting deep with impedance adjustment.. something like that #patchbay #impedance #studio

What Does Hi-Z Button Do On An Audio Mixer?

Let’s take a look at one of the lesser-known but incredibly useful features of an audio mixer: the Hi-Z button. If you’re a beginner in audio mixing, you might not be familiar with this button, so le[…]
https://kettnercreative.com/audio-mixer/what-does-hi-z-button-do-on-an-audio-mixer/

#audiointerface #audiomixer #hiz #hizinput #highimpedance #impedance

Even as a #radio enthusiast, I've had massive problems really understanding the notion of #impedance. I can do the math, but it doesn't really internalize, and I'm always thinking about it in a manner similar to having to use tongs to do a jigsaw puzzle.

Until yesterday, when someone describing why an explosion in the air doesn't move into water easily, and the same for an explosion in water:

It's an impedance mismatch.

And the scales fell from my eyes.

Measuring Impedance Virtually - We always enjoy a [FesZ] video and we wonder if the “Z” stands for impedance? That... - https://hackaday.com/2022/09/26/measuring-impedance-virtually/ #toolhacks #impedance #ltspice

Measuring Impedance Virtually

https://hackaday.com/2022/09/26/measuring-impedance-virtually/

#ToolHacks #impedance #LTSpice