AZL Book: Electrical Math - Wide Range Digital Input

in #azlbookslast month

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It doesn’t look like much, but this has to be one of my favorites.

I was fairly green when I designed this circuit, so I had to take a more roundabout approach. I created a spreadsheet that would calculate the outcome of variations to the resistors and input voltages and display them side by side. I used color coding to show the wattage dissipation so I could quickly asses whether or not a potential solution was viable for my desired range.

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As designed, this circuit accepts a signal from 0-150 VDC. If the input is below 12V, it will output 0. All input voltages above 12VDC will be output as 12VDC. This output is intended to be wired to a 12V digital input.

This circuit has been built into modular terminal blocks and used on many projects of varying functionality.

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In the above picture, each pair of terminal blocks joined by a red jumper represents a block circuit, as shown below:

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This cheap and simple circuit creates a novel solution to an otherwise complicated issue, particularly in the field of universal automation.



Thanks for checking out some more of my work! As always, I hope you enjoyed witnessing as much as I enjoyed creating!

© Photos and words by @albuslucimus, except where otherwise indicated.


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