Buttons matrix with input protection

@VaSe7u

5 years ago

https://everycircuit.com/circuit/4506286161657856

Input delay approximation: T = ( ( ln(1) - ln(0.3) ) * tau) T_low = 1.2 * 40k * 22n = 1.06ms T_high = 1.2 * 50k * 22n = 1.32ms Voltage at specified time: V = V_src * (1 - e^(-t/RC) )