Quiz Show Buttons -- SR-OR version

119

01:10:35

Basic quiz show logic, i.e.:
- when one button is pressed, turn on its light and disable all other lights and buttons
- master reset (MR) button resets the circuit to the initial state

MR is an N.C. w/ pullup; the "contestant" buttons are all N.O. w/ pulldowns.

Each SR latch will Set via its button (rising edge) and hold Reset on all the other latches.  The Reset pins are all also tied to MR via OR gates.

For this and any other circuit, the logic is:

S1 = B1
S2 = B2
R1 = Q2 OR MR
R2 = Q1 OR MR

(Note: flip-flops with additional enable/reset pins might be preferable IRL)

published 3 years ago

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.