Discover how to build a simple device that converts light into electricity using LEDs and diodes. This step-by-step guide ...
Discover how to build a magnetic repulsion motor capable of lighting LED bulbs using only magnets and basic components. This ...
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A converter that tapers off a 4 mA input to zero, and adds the input and the tapered off 4mA signal to create a 2-wire 4-20 mA output loop.