Calculator Culture YouTube Video on the HP-48GX

[Steve Simpkin]

Antony made a great video overview of the HP-48GX Graphing Calculator on his Calculator Culture YouTube channel.
Here is the link:
HP 48GX Graphing Calculator from 1993

[HP-12C]

Always interesting and informative videos from CC, thanks for sharing.

[johnb]

(03-22-2024 07:07 AM)Steve Simpkin Wrote:  Antony made a great video overview of the HP-48GX Graphing Calculator on his Calculator Culture YouTube channel.
Here is the link:
HP 48GX Graphing Calculator from 1993

Steve, you are a bad influence on me.
Great video... but then there was a link... two guys who overclocked a Ti-84 from 16 MHz to 26 MHz just so they could adequately play "Doom" on it. Naturally, because this way increased the thermal power required to be dissipated... they water cooled the calculator's CPU.

[Bowing]

I'm not worthy...
I'm not worthy...
I'm not worthy...

[Steve Simpkin]

(03-23-2024 07:07 PM)johnb Wrote:  

(03-22-2024 07:07 AM)Steve Simpkin Wrote:  Antony made a great video overview of the HP-48GX Graphing Calculator on his Calculator Culture YouTube channel.
Here is the link:
HP 48GX Graphing Calculator from 1993

Steve, you are a bad influence on me.
Great video... but then there was a link... two guys who overclocked a Ti-84 from 16 MHz to 26 MHz just so they could adequately play "Doom" on it. Naturally, because this way increased the thermal power required to be dissipated... they water cooled the calculator's CPU.

[Bowing]

I'm not worthy...
I'm not worthy...
I'm not worthy...

Ha! Yes I have spend more time than I am willing to admit watching an endless succession of the "Recommended videos" shown to the right of the one I am watching.

Now off to find the one you mentioned... There it is.
Water Cooling a TI-84 Graphing Calculator!
Awesome!

[KeithB]

Not a calculator, but I currently work at a company that makes high power RF transistors. Obviously, cooling is a concern. We have been approached to try to run our part immersed in an inert fluid to enhance conductive cooling.

[johnb]

(03-25-2024 06:29 PM)KeithB Wrote:  Not a calculator, but I currently work at a company that makes high power RF transistors. Obviously, cooling is a concern. We have been approached to try to run our part immersed in an inert fluid to enhance conductive cooling.

Interesting, let us know how that goes.

I'd be particularly interested in what you guys decide for a cooling medium. I'm a little paranoid: water cooling -- even distilled, deionized water -- makes me a little nervous around electronics. (Even if the components are not directly exposed to it. Fittings sometimes leak!) I would think a very low-viscosity nonconductive oil would make a good coolant, though I can imagine that it will never achieve as many BTU-transferred per unit volume as water does.


Annnd.... now I've gone completely off-topic...

[John Keith]

(03-25-2024 06:55 PM)johnb Wrote:  I would think a very low-viscosity nonconductive oil would make a good coolant, though I can imagine that it will never achieve as many BTU-transferred per unit volume as water does.

Actually, most high-voltage transformers and switchgear are filled with mineral oil which provides both cooling and electrical insulation.

[johnb]

(03-25-2024 09:00 PM)John Keith Wrote:  

(03-25-2024 06:55 PM)johnb Wrote:  I would think a very low-viscosity nonconductive oil would make a good coolant, though I can imagine that it will never achieve as many BTU-transferred per unit volume as water does.

Actually, most high-voltage transformers and switchgear are filled with mineral oil which provides both cooling and electrical insulation.

LOL! I can tell I'm getting older. Back in the depths of my mental archives, I knew that, but it wasn't directly accessible to my conscious mind!

[Chumango]

Magnets used to focus and steer beams at particle accelerators are water cooled. The deionized water goes through cooling passages in the copper windings and bus bars. These magnets use multi-thousand amps current. So water and electricity can play together.

The copper stator coils in generators at electric power stations are also cooled by DI water. They are directly cooled by water flowing through the coils. Lots of electrical power there.