@frogandtoad You're right and when you come down to it we don't know the design of the mechanism. If we had enough information on the motor we coul...

Borrow a trick from mine hoist technology-- hang a counterweight on another drum on the same shaft. If the two weights are equal the motor only suppl...

@dronebot-workshop Put me down as interested. I just bought a few as learners and initially to add one to a 4X4 keypad. The initial reaction: H...

Thanks, I guess the problem is that I attached a .pdf, not .jpg

@dronebot-workshop (and others) DIY electrical equipment design for this type of thing is a full blown engineering project and it's probably b...

@robint All right,, you're up on me. The picture you've posted of my attached file is what I wanted to do in the first place but could not figure o...

Here's an example of a graphical method for selecting the series resistor for an LED. The same general approach works for many (or most) non linear de...

@robint OK I think I've got the "attach file" working so I'll whip up an example of the graphic for all to admire

The key difference between "direct" and "independent" is that the direct uses the single power supply to power both meter and load. In the indepen...

@robint and tperry724 Both you and tperry724 leave me very puzzled about what you are talking about, probably because "LED light" is not well...

I haven't used "Keypad.h" but made up my own code to read the keypad. What catches my eye in a quick look at your code is that you've put the action...