Automating button presses with timed delay

Discussion in 'The Projects Forum' started by ixalon, Jan 10, 2011.

  1. ixalon

    Thread Starter New Member

    Jan 10, 2011
    1
    0
    Hi everyone

    I'm trying to automate the start up of an old DLSR I've stripped down. To get it to start up in 'PC control' mode without user-interaction.

    What's needed is for 2 button presses to be simulated (I've tested that I can replace the buttons with simple momentary push buttons) i.e:

    • a circuit that waits around 5 seconds from the time power is applied
    • closes the circuit of the first button for 0.5 seconds
    • pauses for 0.5 seconds
    • closes the circuit of the second button for 0.5 seconds
    • either stops or repeats (further button presses are ignored)
    Does this level of complexity require/benefit-from a microcontroller, or can I achieve it with a couple of 555s, transistors, capacitors, resistors and say a 74HC4066?

    Hoping someone can help!
    Chris
     
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