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October 23, 2009
about 6 years ago
This reminds me of the Suicide Bunny comics: http://www.youtube.com/watch?v=h8z2Cidrii4
This could be fun, but I don’t quite understand the point other than humor. I’m not sure whether I want to design something that ends up destroying itself.
about 6 years ago
I got both the thumb stick and the breakout board. The Vert and Horz were pretty easy to use since they are just the voltage division value based on the Vcc. If Vcc in 5V, then the center position is 2.5V. I don’t know the rating on the potentiometers so it’s probably safe to not put too much voltage across it. I tried 3.3V and 5V and you get more voltage resolution with the higher voltage.
The SEL wasn’t as straight forward. I thought when you push the button down you just get Vcc at Sel, but it’s actually the opposite with the way the PCB is made. You get “GND” at SEL. I think you could just reverse the GND and VCC to give SEL a logic high. However, all you Horz and Vert voltages will be backward. Anyway, I kept the wiring the way it was intended and just hook select up to a load with Vcc on the other end. I put an I/O pin from an MCU at SEL to check for logic change to low and that works fine.
This thumb stick and the breakout board are great! I now have my servo controllable with the thumb stick and I use SEL to change from fast speed to slow speed.
Tutorial - Beginning Embedded Electronics - 10
about 7 years ago
In fact in Eagle 5.7, if you go to “Grid …” option under “View”, you can set the units and your choices are mic, mm, inch, and mil.
Mil is a unit just like thou and 1 mil equals to 0.001 inch. It’s also referred to as “point”. So you are also correct in calling 0.008" as 8 thou. I think both mil and thou comes from mixing the metric system with the English system. Thou probably comes from “thousand” and Mil probably comes from “milli”. In CAD or PCB layout program, you often work with Mil rather than Thou.
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