EEVblog 1640 - Mailbag: 4k Microscope, Panaplex Displays, Piezo Singing, RF magic

More interesting mailbag!

00:00 - Forrest M Mims Make: Maverick Scientist: My Adventures as an Amateur Scientist
Engineers Mini Notebook are still available!
03:30 - Unmanaged615
04:40 - Piezo tranducer sensor thing + singing capacitors and hydrophones
08:18 - Simpson panel meter with GORGEOUS Beckman Panaplex display!
13:41 - 10GHz RF tank level sensor, teardown + how it works
20:16 - Tomlov TM 4K AF Max Microscope

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#ElectronicsCreators #Mailbag

[SeanBZA]

Piezo item is a fan, run it on 115VAC at 60Hz and it acts as a fan. Was designed as a long life fan, with no moving parts, and with no stray magnetic field.

[ame]

wow that display has possibly the best contrast and sharpness i've ever seen in a segmented display! beautiful!

[KHJ]

The business end of the radar is the hole in the bottom where a horn antenna is attached. The aluminum pan is the weather proof top.

[biologicalagent]

When trying to get my kids in involved in EE, the first thing I bought them was a small 1A variable bench supply, a breadboard with jumpers and some components AND.... all of the Forrest Mims Engineer's mini notebooks!!!

[MikeSmith-shko]

Fran's Heathkit clock has those panaplex displays in it 👍

[The_Mimewar]

I still have my Forest M Mims books from radio shack from 1992!!

[bigwave_dave]

Bravo! I'd reckon Forrest Mims III has taught more people about constructing electronic circuits than anyone else, save, maybe Horwitz & Hill. Sadly, Radio Shack is gone but hopefully Forrest's work will live forever.

[btizef]

Anyone else screaming "it's a fan!"? 😂. I saw them first on linus tech tips. Good for long life applications where air flow can be low or just needs to be agitated. Pretty cool.

[qwaqwa]

I got a pair of those piezo fans, like, over 40 years ago!

[retrozmachine]

Look at that orange. It's so vivid. I don't think I've seen anything like it in my life. I just can't stop watching. But enough of the USA elections, let's take a closer look at that Panaplex display.

[stdorn]

So weird, I was just thinking about Forrest a few days ago. Im glad im not the only one who was influenced by his work and remembers him. I never hear anyone mention him. I wish I still had all the mini notebooks. I cant even tell you how many times i referanced transistor, 555, and opamp notebooks as a kid starting electronics in the 80-90s.

[theantipope]

Forest Mims! I remember his little electronics text books from Tandy, back in the 70's & 80s!

[tamtgirl]

the white line at the bottom of the screen on the microscope is a touch slider for the built in ring light. i have the cheaper 8" version. on mine it really doesn't light up the work much but is good for a fill light when using the bigger lights eliminating weird shadows

[uwezimmermann]

I had to immediately order the book! Thanks for the tip!

[oskimac]

I just came across the sub surface Simon video yesterday! Amazing

[hillppari]

I used to do maintanance on those tank level radars. So much fun to trouble shoot old equipment. Inside the tanks were gasoline products etc.

[GrahamTinkers]

Dave, the internal light control is to the left of the power switch! It’s a slide touch control 😂

[TLang-elsk]

Panaplex display are nice. I have a few Sperry SP333 devices (3 digits), several Telefunken ZM1350 (one digit, 14 segments) and a few Russian displays (I think around 20 digits 7 segment) over here. Love them...

[brooklyndrive]

Heathkit SB104 HF transceiver used the panaplex.
May have been the display in the Apollo Guidance Computer DSKY (Display/Keyboard)

[papabeartx]

Forrest Mimms III - Interesting that in the '70's I was living in Australia (Sale, Victoria) and now I live in Central Texas only about 10Km from where Forrest lives. Small world.