microflarets
technology ∩ social change
too soon?
diy etching solution
he doesn’t give exact amounts but it looks like 4 parts vinegar, 1 part hydrogen peroxide and a teaspoon of salt.
Always wanted to try something like this, although I was thinking of just logging signal strength and GPS coordinates, and plotting it later. This is far more striking.
rough roaster prototype
thermocouple vs. thermistor
A thermocouple measures the temperature of a point, whereas a thermistor measures the temperature of an area. The thermistor here has been calibrated using the thermocouple. So they may just be measuring different things. That said, they’re pretty close.
Relative temperature is more important than absolute temperature. If relative measurements are correct (i.e. the difference between successive readings) then the temperature profile that produces a good result will be repeatable.
balancing a pencil
this is actually three bits of advanced tech. first is the interesting gantry system design, which moves the cup, second is the AI control system, which balances the pencil and finally the retina design, which feeds back the pencil position into the control system.
