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Subject Author Posted Replies
 
battery charger
I picked up a AAA NiMh battery charger. The label reads: Output: 1.2 V 800 mA AA/AAA charging: 120 mA Why the two different current specs? Does not compute - Maybe 800 mA is maximum rate and 120 mA...
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IBM Selectric typewriter
I have two cycle wheels for the IBM Selectric typewriter. Nooooo.... you must be kidding...
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LED flashlight
I was looking at some LED flashlights, with ratings from 50 to 150 lumens. A p-n junction is a p-n junction, how do they get such varied outputs? I examined the working end, they all look alike, with...
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car phone
In old movies, you sometimes see something called a 'car phone'. Always in a limousine. How did those work? -- Rich Like two way radios, though perhaps some were duplex (I know some two way radios...
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LEDs Series-Parallel OK?
Connecting LEDs in series-parallel like the ASCII schem below is okay? I don't see any reason why it shouldn't work. If a lot of LEDs, like the 7 below, are paralleled, the total current for each...
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