I am working through problem 10.33 in the new (third-edition) Art of Electronics textbook. It states:
Design a reaction timer. “A” pushes his button; an LED goes on, and a counter begins counting. When “B” pushes her button, the light goes out and an LED display reads the time, in milliseconds. Be sure to design the circuit so that it will function properly even if A’s button is still held down when B’s button is pushed.
I am assuming that the display is in hexadecimal (as in Fig. 10.90 of the text), and my solution uses a single-pulse generator (“one-shot”) whose circuit diagram is given in Fig. 10.75 of the text. I also am omitting the LED light for simplicity. I’ve come up with a solution that I believe works (attached), but I am new to digital electronics and would therefore appreciate feedback on:
1) whether it is correct
2) how it could be improved
Thank you!
Design a reaction timer. “A” pushes his button; an LED goes on, and a counter begins counting. When “B” pushes her button, the light goes out and an LED display reads the time, in milliseconds. Be sure to design the circuit so that it will function properly even if A’s button is still held down when B’s button is pushed.
I am assuming that the display is in hexadecimal (as in Fig. 10.90 of the text), and my solution uses a single-pulse generator (“one-shot”) whose circuit diagram is given in Fig. 10.75 of the text. I also am omitting the LED light for simplicity. I’ve come up with a solution that I believe works (attached), but I am new to digital electronics and would therefore appreciate feedback on:
1) whether it is correct
2) how it could be improved
Thank you!
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