Re: How you can make cold-brew coffee in under 3 minutes using ultrasound

On a sunny day (Sat, 11 May 2024 22:46:23 +0200) it happened "Carlos E.R."
<robin_listas@es.invalid> wrote in <v125hkxsmb.ln2@Telcontar.valinor>:

On 2024-05-11 08:19, Jan Panteltje wrote:

How you can make cold-brew coffee in under 3 minutes using ultrasound
  https://arstechnica.com/science/2024/05/how-you-can-make-cold-brew-coffee-in-under-3-minutes-using-ultrasound/
 

>
It is interesting. Anyone criticizing the method, should read the
article first, and then criticize with precision.
>
Me, I am curious and would like to taste it and do my own comparison.

Yep, it is cool, I have not been much into coffee the last year or so,
but I have a lot of high power ultrasonic stuff here,
was for ultraonic anti-fouling (cleaning ship outside from stuff growing on it)
No boat ATM, so it is sitting here for experiments:-)
 https://panteltje.nl/pub/ultrasonic_anti_fouling_circuit_diagram_IMG_5144.JPG
 https://panteltje.nl/pub/listening_to_ultrasonics_IMG_5145.JPG

Note the big transducers:
  https://panteltje.nl/pub/40_KHz_ultrasonic_transducers_IMG_5133.JPG

It can automatically send a whole range of frequencies:
 https://panteltje.nl/pub/ ultrasonic_anti_fouling_OLED_running_5120.avi

Wind your own transformers:
 https://panteltje.nl/pub/ultrasonic_antifouling_bigger_transformer_IMG_5179.JPG

So maybe when I regain that craving for coffee I will have a go :-)

So this was some electronics for a change...