You can help fund Techmoan with a donation

Click to visit  

SEARCH BOX: Searches this website


For more info on this - click on "About' at the top of the page. 


Techmoan never approaches a company asking for review samples.



Articles by Category


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%! 

« The Jingle Cart Machine | Main | Where are all the Handheld Digital TVs? »

Edison Cup Phonograph Kit Assembly

A good proportion of viewers seemed to enjoy my Gakken Wax Cylinder kit video despite the less than impressive here's the sequel. 

This take on Edison's phonograph records onto disposable plastic cups rather than wax cylinders. This makes it less historically accurate than the first kit, but will hopefully mean that it produces much better results.
You can see how I get on in the video below.
If you want to buy this kit - here's the link on Amazon US 


EmailEmail Article to Friend

Reader Comments (9)

I assume this has a diaphragm that is moved by sound that vibrates the stylus. Do you think this needs to be 'run-in' to make it more flexible? A bit like running-in a set of new speakers. Perhaps if you play some thrash metal down the horn for a whole weekend it will make it flex a bit more. Or try warming up the rubber section to make it more flexible?

July 7, 2017 | Unregistered CommenterAnt

I wonder if it would make a difference if a cup would be turning in another direction.

July 7, 2017 | Unregistered CommenterSasa

Hi ho there!

Sorry the device didn't work. Shame that it had that result. But it was a lot of fun watching you try! A for effort, as they say!

And I am a big fan of the puppets. Great job with them too.

Thanks for the hours of entertainment and some nostalgia! So so appreciated!

July 8, 2017 | Unregistered CommenterRod P.

Will the mark 3 version record Hi Fi ?

July 14, 2017 | Unregistered CommenterJeremy

Could you use a cup as a mould to cast a wax cup shaped version? Maybe use a paper cup as the mould if a plstic one might melt. Then try the softer wax 'cup' and try recording on that. Just a thought although possibly not a great one as the wax substitute one may be too heavy.

July 17, 2017 | Unregistered CommenterDavid

I wonder if making the funnel to needle airtight would improve the recording process?
I also wonder if using a plastic or extremely lightweight needle would help with the playback?
Looks like a great STEM project if it ever worked.

July 17, 2017 | Unregistered CommenterViper DaSnake

Looking at videos of actual Edison equipment, the construction is extremely robust. So I do not think a cheap plastic version is possible even though people seem to want it to be. I am wondering if reading the cup with a phonograph stylus might work? Maybe if you have a photograph you could remove the horn and stylus system of the Edison, mount the cup spinning mechanism on the turntable* and use the phonograph stylus to playback the cup recording through the speakers. That would show if the problem is with recording or playback.

* Not sure what to do about the turntable spinning the Edison player about.

July 17, 2017 | Unregistered CommenterGeorge

Very funny. I can even imagine your neighbours faces hearing you while you are shouting, trying to record something. Thanks for your videos. And, of course, I like puppets to.

July 23, 2017 | Unregistered CommenterJaume Martí

I saw a video online of a home-made version of the cup recorder and it worked well, The difference is that he cut the cup with the steel needle and played it back with a bamboo needle with much less tracking weight. I suspect that may be the problem. How about trying it again to see if it will work that way?

March 29, 2018 | Unregistered CommenterJLC

PostPost a New Comment

Enter your information below to add a new comment.
Author Email (optional):
Author URL (optional):
Some HTML allowed: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <code> <em> <i> <strike> <strong>