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Techmoan Merchandise at TeeSpring


Pick of the Camera Reviews

(Click the pictures for reviews & links) 


Yi 2 - Best Budget 4K 

Gitup Git2 (My Pick)

Xiaomi Yi


DR02 D - Best Budget Dual Cam

Yi Ultra 2.7K
Mobius (also works as a Dashcam)
Polaroid Cube+
Drift Ghost X

My favourite USB battery power Pack

This is the excellent USB power pack I use when I travel.

2 x 2.1amp outputs. 8400mAh capacity.

Two digit Led display shows battery level


What SD CARD should I buy?

If you want an SD Card for your camera - these are the ones I use and recommend. 

I'd strongly recommend not to buy any SD cards off ebay - I've heard about too many issues with counterfeit cards - often sold on by unwitting resellers. My inbox regularly gets messages from people who bought a £150 camera then cheaped out and bought a £3 memory card on ebay - Then when it doesn't worth they blame the camera! It doesn't make any sense. Good memory is cheaper than it's ever been - see the links above.

A lot of HD cameras will not work properly with cards larger than 32GB (cards over 32GB are usually SDXC rather than the SDHC standard used by 32GB cards. SDXC cards use the ex-FAT system rather than FAT32 - in short they are a different standard). - so don't just buy the biggest card you can afford - read the specs in the manual to see what it accepts.


RECOMMENDED CARDS (for action cams - see dashcams below)

CLASS 10 UHS-1 CARDS (For HD Cameras)


U3 CARD (For 4K cameras)




The SD card in a dashcam is re-written over, more frequently than in other types of cameras. Some manufacturers void their guarantee if an SD card was used in a dashcam. So, no surprise, there are special High Endurance SD cards made just for's some.


VERY IMPORTANT. These links take you to the product, however Amazon have three different ways of selling. There's Amazon Direct - This means that you are only dealing with Amazon themselves, then there's other sellers that use Amazon's facilities - these show as Fulfilled By Amazon and finally there's Market Place sellers that advertise on Amazon, but operate independently.  I strongly recommend that you only use the first...the Amazon Direct - Sold By Amazon option. Even if it appears that you are paying a couple of £/$ more it is more than likely you are comparing the price of a real item against the price of a fake.

To give you an idea of the extent of the fake goods problem. In a 2016 survey by Apple - 90% of the 'Apple' chargers sold through Amazon - using the other the two methods..which includes the "Fulfilled by Amazon" option -  were found to be counterfeit....90%! 

« Laserdiscs aren't back - but their sleeves are | Main | HP-01 In 1977 HP invented The Best Watch Ever* »

Music to watch Oscilloscopes by

Sometimes my videos form a bridge between the mainstream and the obscure. People often suggest video topics to me, and then that video in turn introduces a whole new audience to the subject. I suspect oscilloscope music will be one of those things. 
During the years I spent searching for a HiFi component with a scope output, I watched a number of blurry handheld videos of various devices on youtube. One one occasion I saw a Marantz receiver displaying a revolving cube on the scope display. At the time I presumed that someone had altered the circuitry, but I now know that they were playing an oscilloscope demo.
Oscilloscope demos have been around for a while, but until recently I wasn’t aware of them, and I spend at lot of my time looking at tech. Of course using oscilloscopes unconventionally is nothing new, the 'first video game' Tennis for Two used one as the display in 1958.
I suppose things like this are inevitable whenever you combine intelligent people with time on their hands and a room full of scientific equipment. Nowadays you can even play Quake on an oscilloscope
Displaying images on an oscilloscope is as ‘simple’ as playing sounds into it. The left and right audio channels create shapes plotted on x/y co-ordinates. 
I don’t truly comprehend exactly how it works, it just looks like magic and when you add in the additional complication of having those sounds form tunes, all I can do is sit back and admire the show. 
Watch the video below to see this in action. If you want to skip the introduction and repair section and just watch the scope, jump to the 5 minute mark. 
Useful Links
Jerobeam Fenderson’s Youtube Page
If you have any technical queries - the FAQs here should answer them
Oscilloscope Emulator for Windows, Mac & Linux
Reddit Oscilloscope Music Page 
Here’s a link to another Oscilloscope audio Demo called Youscope

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Reader Comments (6)


I don't know if you already saw this. In case not, I post the link:

Another cool way to visualise music. It just needs microgravity :)


November 23, 2016 | Unregistered CommenterCiro

Wow. Cool, man.

November 25, 2016 | Unregistered Commentermesh

Interesting stuff. Thank you. By the way, my dog liked the songs...

November 29, 2016 | Unregistered CommenterAndy

Another great episode!
Here's my Atari "Tempest" arcade game running and also simultaneous on a scope,
likewise a Atari "Space Duel" (vector XY also) PCB on the other picture running on a scope! :)

December 6, 2016 | Unregistered CommenterMatte

Hi Matt, you continue to amaze me with what you find. Have a great Xmas :-)

December 22, 2016 | Unregistered CommenterTraction Tim

Thanks old chap, I'm hoping to get one (and a half) more videos out before the big day.

December 22, 2016 | Registered CommenterTechmoan

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