3 ms·
Back in 1986 I was asked to build a set of "game show" buzzers that would allow a number of contestants to hit their button and it would show who pressed first.
by jakedata 3y ago
Back in 1986 I was asked to build a set of "game show" buzzers that would allow a number of contestants to hit their button and it would show who pressed first. I ended up creating a system that used relays that would latch the first button pusher's indicator ON and cut power to the other controllers at the same time. I came up with an improved design to allow an arbitrary number of buzzers to be daisy-chained but they didn't want to pay for version 2.0. It was a fun side-hustle for this high school Radio Shack employee.
- projektfu 3y agoCool, I worked on the same quiz bowl apparatus as a pet project around 20 years later. I remember the available commercial options ca. 1998, generally made by small shops. One popular one must have been a similar S-R latch design, and another was probably based on a microcontroller, as it tested the lights and buzzer when it was turned on. I am impressed with arbitrary daisy chaining. Mine was limited to 4 per side, but had a shared cable.