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
    1
    0
    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
    1,964
    387
    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.
     
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