Compared to the previous experiment this circuit is relatively easy to build on the breadboard. Nevertheless, I made a mistake. I forgot to connect the output of the second OR gate of the 74HC32 chip to the second 555 timer. As a consequence pushing S3 didn't light up the second LED and the other button was not locked. After comparing the circuit on the breadboard with the schematic I discovered my mistake and corrected it.
I uploaded a video on this experiment to my YouTube channel at https://www.youtube.com/watch?v=NbgLElHG3l8.
|Close-up of the circuit on the breadboard.|
|Overview of the circuit with the two tactile switches, S2 and S3 and the SPDT switch S1.|