A single general-purpose tri-state I/O pin serves to both control and measure U1's time-out. The pin is programmed for output and pulsed positive to start conversion, then tri-stated for timer input. Conversion time (T) is 10 ms for V_IN = 0, de

Authors	Stephen Woodward
Main Document	Article «Microvolts to kilovolts in milliseconds with one I/O pin»
Description	Figure 2
File Format / Size	PDF / 7 Kb
Document Language	English

Other Materials from the Main Document

Figure 1. U1 works with R1, R2, and C1 to logarithmically digitize 0 kV to 1 kV inputs while tying up only one microcontroller I/O pin
Figure 2. A single general-purpose tri-state I/O pin serves to both control and measure U1's time-out. The pin is programmed for output and pulsed positive to start conversion, then tri-stated for timer input. Conversion time (T) is 10 ms for V_IN = 0, de
Figure 3. The conversion time (T) in milliseconds for V_INfrom 0.01 V to 1000 V

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