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Periodic Spectra
Fourier Principles
Oscilloscope Atlas
Timer 555 Circuit
Oscope Spectra
555 Timer Monostable
555 Timer Astable
7490 Decade Counter
Flashing LED Circuit
This is the schematic I made for the 7490 decade counter circuit. It includes LED's, resistors (680 ohms), an oscilloscope, and a 5 volt power supply.