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I recently made a pulse timer with an LCD display to measure servo pulses. It then occurred to me that the unit could be modified to display frequency as a frequency counter or tachometer. The relationship between period and frequency is frequency = 1/time period so the challenge was to use...

TLR Voltmeter Project. I have only just joined the forum and notice that when writing code to drive an LCD most people seem to use the 18M2 chip. I made this voltmeter to use a 14M2 chip to drive the LCD as an experiment and I share the code and circuit it in case it is useful to other...