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
    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!