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How to make a servo tester with a 555 timer IC | JLCPCB

In this project, I'll make a small circuit capable of controlling a servo, it is a servo tester made out of a 555 timer IC.
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Tune 555 frequency over 4 decades

Using the LMC555 CMOS analog timer to set a frequency from < 10Hz to > 100kHz, giving this design a strong dynamic range but ...