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[PStechPaul]

Those that can, do

Those that can't, sue!

[PStechPaul]

Some time ago I was unsoldering a wire from a terminal, and when it pulled loose, a bit of solder splashed into my eye. I heard it sizzle! It was embedded...

[PStechPaul]

I have noticed that the "Go to first unread post" button takes me just a little bit past the beginning of that post, but it's certainly a minor...

[PStechPaul]

Damage to roads and bridges is proportional to the weight of the vehicle, which is inversely proportional to fuel economy. Most EVs and hybrids are rather...

[PStechPaul]

That description applies to some forums, such as DIYelectricCar, but here the only input is a "Like" button. So negative reputations like "Has...

[PStechPaul]

A switching PSU can be used, but be careful when connecting and disconnecting it - make sure current is very low before opening the circuit. It may be...

[PStechPaul]

The 555 is a good choice, especially if you want high current (100 mA or so) output drive. But I would argue that the most versatile, cheapest and lowest...

[PStechPaul]

The resistor at the source pin of a MOSFET or the emitter of a BJT provides feedback, but the dynamic range and stability are limited at very low currents....

[PStechPaul]

It's not beryllium copper - it is a beryllium oxide insulator that can be hazardous if broken or crushed. Also, there is a small amount of slightly radioactive...

[PStechPaul]

I found some articles on making electromagnets from MOTs:

https://www.instructables.com/id/Mic...Electromagnet/

https://hac...

[PStechPaul]

There are many articles on-line that deal with MOTs and how to repurpose them for other applications, although usually for high voltage supplies and high...

[PStechPaul]

Generally speaking, the best and most popular method of controlling brightness of a string of LEDs is by means of Pulse Width Modulation (PWM), where...

[PStechPaul]

A very simple and versatile circuit is the multivibrator:

https://en.wikipedia.org/wiki/Multivibrator

It is easy to adjust values...

[PStechPaul]

This sounds like a relaxation oscillator: https://en.wikipedia.org/wiki/Relaxation_oscillator

It can be made using a unijunction transistor:...

[PStechPaul]

Things like cylinder bores and plain bearing surfaces typically require tighter tolerances as indicated. Inside dimensions and holes will likely have...

[PStechPaul]

Using my EV calculator: http://enginuitysystems.com/EVCalculator.htm

Vehicle weight: 3300 lb
Average speed: 37 MPH
Average acceleration:...

[PStechPaul]

I have always seen +/- 0.005" as default tolerance for dimensions with three decimal places, as on the following from my machine tools class:...

[PStechPaul]

http://www.animatedengines.com/gnome.html

[PStechPaul]

So, "Hoosier Daddy"? "That's dope!", "It's the bomb!", "So sick", "Smoke a fag".

...

[PStechPaul]

Soon after I bought my HF 9x20 lathe, I decided to buy a 4 jaw chuck, and since it had a 9" swing, I figured an 8" chuck would be perfect. So...