Anyroad, got this for the garage where I didn't want to trust a decent calculator to fate and/or a ham fist, and the sketch pad seemed like it might be useful for reminding one what the calculation is for.
It's not an LCD - I think it works on the same principle as an Etch-A-Sketch (that is, it's an electrostatic screen). And just to confirm that I took the battery out and could draw on the screen, and, as expected, the button didn't erase it. So the battery appears to be only used to erase (the E-A-S equivalent of shaking it inverted).
The stylus is only there to prevent you using a sharp implement (like an real pencil). You can draw with a fingernail, but the stylus has a decently large radius to prevent scratching.
It's not an LCD - I think it works on the same principle as an Etch-A-Sketch (that is, it's an electrostatic screen). And just to confirm that I took the battery out and could draw on the screen, and, as expected, the button didn't erase it. So the battery appears to be only used to erase (the E-A-S equivalent of shaking it inverted).
Chinesian day, so enabled by some other forum member and the small price, I've got the ceramic screwdrivers, sadly, in the set are three flat and one Phillips, but I'll hunt for a square and hex as well and maybe a star:
https://www.aliexpress.com/item/1005003944841422.html
also when I was ordering the screwdrivers I've seen some wolfram tipped scratchers, and I've got two for a song:
https://www.aliexpress.com/item/1005003234527797.html
They're absolutely BRUTAL, the tip scratches everything I've tested with, from an old sapphire watch glass, to a real chrome-vanadium tool, PCB and other stuff is like butter.
Enjoy the pictures,
DC1MC
Goot are a well established Japanese brand - I wonder if these are original or fake? Seems like a strange thing to bother counterfeiting.
The 'scratcher' looks good. In English it would tend to be described as as a tungsten scriber, not really sure why we dont call it wolfram, especially given that its technical symbol is W.
The 'scratcher' looks good. In English it would tend to be described as as a tungsten scriber, not really sure why we dont call it wolfram, especially given that its technical symbol is W.
It seems to have been an English thing to have their own names for elements: Potassium (K) is Kalium in German and Sodium (Na) is Natrium in German.
McBryce.
History
In 1781, Carl Wilhelm Scheele discovered that a new acid, tungstic acid, could be made from scheelite (at the time called tungsten).[39][40] Scheele and Torbern Bergman suggested that it might be possible to obtain a new metal by reducing this acid.[41] In 1783, José and Fausto Elhuyar found an acid made from wolframite that was identical to tungstic acid. Later that year, at the Royal Basque Society in the town of Bergara, Spain, the brothers succeeded in isolating tungsten by reduction of this acid with charcoal, and they are credited with the discovery of the element (they called it "wolfram" or "volfram").[42][43][44][45][46]
First pic is the Mk4, dated 1972, in mint condition, I doubt it has ever been used! Complete with leather case, leads, probes and destructions!
Second pic is the Mk5, dated 1973, same condition and accessories.
The 'scratcher' looks good. In English it would tend to be described as as a tungsten scriber, not really sure why we dont call it wolfram, especially given that its technical symbol is W.
It seems to have been an English thing to have their own names for elements: Potassium (K) is Kalium in German and Sodium (Na) is Natrium in German.
McBryce.