Game show buzzer automatic reset

Discussion in 'The Projects Forum' started by Ryanmm50, Jul 28, 2016.

  1. Ryanmm50

    Thread Starter New Member

    Jul 28, 2016
    Can anyone help me design this circuit to automatically reset after 5 seconds? I made a game show buzzer circuit for my English class (I'm a English as a second language teacher) but as it is you have to then off and then on to reset.
    Maybe another 555 timer with a capacitor? Included is the wiring diagram that the project came with.
    I'm very new to electronics but it has been a fun hobby so far. I don't know anything except the basics.
  2. AlbertHall

    Well-Known Member

    Jun 4, 2014
    You could do it with the '555s you already have in the circuit.
    For each '555:
    1. disconnect pin 6 from ground
    2. Link pins 6 & 7
    3. Connect 10M resistor from 6 & 7 to positive supply
    4. Connect 47nF capacitor from 6 & 7 to ground.
    This makes each '555 into a 5 second monostable.