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Logic Gate Display 2.0
orthotolidine
36 views
Automated display of the three basic logic gates (NOT, OR, AND), using a 555, 7404, 74LS107, and a 7400. The core of the circuit is a "divide-by-4 counter", which consists ...
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Electrolytic Zinc Hydroxide
orthotolidine
135 views
Manufacturing zinc hydroxide using sodium bicarbonate and electric current. No acrylic fabrication is required. The zinc metal and graphite rod are obtained from a "zinc-ca...
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Audio Oscillator Coil
orthotolidine
218 views
Instructions for building a transformer from paper and a nail (along with #36 AWG magnet wire), and getting it to generate a tone. Effect of core position on frequency is d...
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Images of Ferrous Sulfate
orthotolidine
1,099 views
A slide show of ferrous sulfate at various stages of production, comparing results obtained with freeze precipitation and crystallization.
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Cell Operation - PS
orthotolidine
144 views
Operation of electrolytic cells with regard to power supplies and ballast, including sample runs with aqueous alkali chlorides as electrolytes and dimethylbenzidine in the ...
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Cell Architecture
orthotolidine
164 views
Slide show of assorted electrolytic cells depicting various means of construction. Divided and undivided cells compared.
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Unboxing F-rods
orthotolidine
84 views
Extracting graphite rods from a zinc-manganese (zinc-carbon) 6V lantern battery. These rods can be used as anodes in electrolytic cells.
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Dimethylbenzidine
orthotolidine
160 views
This reagent is used for testing chlorine concentration in swimming pools. It is commonly known as o-tolidine, orthotolidine, or, 2-tolidine. For pools and tapwater, it wil...
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Acrylic Turbine
orthotolidine
1,040 views
Paddle-wheel made from polymethylmethacrylate, powered by a party balloon, and then by a pump. The apparent changes of direction and speed that deviate from the true rotati...
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Acrylic Motor
orthotolidine
114 views
Electric motor made from polymethylmethacrylate, two button magnets, one electromagnet, and a control circuit using an infrared beam.
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