In this case, the fixed value of the capacitor is 100uF. The value of R consists of a 10KΩ resistor in series with a 1MΩ potentiometer. We can vary the potentiometer to change the time period of the ...
I made a music player that uses RFID cards to play music. The brain is an arduino uno, and the rfid module is a RC-522. The player plays music from a DFPlayer Mini ...