From FB comment There are many factors that affect price. One part is getting things assembled by underpaid and child (illegal) labor. Most discounters have been caught buying their goods from these illegal sweatshops, and they still turn a blind eye to these abuses. The net result is that the quality of the components may
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From FB post One important thing that people forget to do is consider what might happen with a circuit that has anything that draws power from the protoboard. If you’re working with a few low power devices such as small LEDs and switches, then there is usually not a problem. But if you have a
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From FB post about Arduino driving a ‘HC595 chip. You don’t need an oscilloscope to see digital signals. If you slow down the speed, you can see what’s happening by looking at LEDs. Everything is digital, just on or off. Plug two red LEDs, transistors, and current limiting resistors for LEDs (330 ohms), and for
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From FB comment I got an ultrasonic cockroach ‘repeller’ from someone who had it on the kitchen counter. I opened it up and found it was full of cockroach carcasses. Looks like it attracted cockroaches instead of repelling them. They probably sprayed real cockroach killer in it. Since it was obvious that it didn’t work,
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From FB comment in group Vintage Transistor Radios I think we like the look of wood because of some primeval instinct from our distant past. Perhaps it has something to do with the trees being protective, under which we could take shelter during rain or shine. Or perhaps those prehistoric people who survived longer
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