Hello all, I've been working on a circuit for a while now, and so far my efforts have fallen flat. Here's the background on what I'm working on:
I have a digital video camera that I need to set up to start recording soon after it receives power. The camera does not turn on automatically when power is applied, the power button (contact switch) needs to be pressed. Another contact switch must be pressed to start recording.
What I've designed so far uses a 74HC4066 switch to trigger the camera buttons, that part is simple enough. My problem lies in triggering the 74HC4066 inputs reliably.
So far, I've set up two different monostable multivibrator circuits, my problem with each is that the input for each needs to be in the form of a pulse, and designing something elegant that works has eluded me.
I wouldn't have thought this would be a difficult circuit, my core issue seems to be that my trigger input is going high and staying high. So, rephrasing what I'm needing, I'm looking for a circuit that can use an SPST switch (non-momentary) to generate a single pulse of a desired width.
Thanks!
I have a digital video camera that I need to set up to start recording soon after it receives power. The camera does not turn on automatically when power is applied, the power button (contact switch) needs to be pressed. Another contact switch must be pressed to start recording.
What I've designed so far uses a 74HC4066 switch to trigger the camera buttons, that part is simple enough. My problem lies in triggering the 74HC4066 inputs reliably.
So far, I've set up two different monostable multivibrator circuits, my problem with each is that the input for each needs to be in the form of a pulse, and designing something elegant that works has eluded me.
I wouldn't have thought this would be a difficult circuit, my core issue seems to be that my trigger input is going high and staying high. So, rephrasing what I'm needing, I'm looking for a circuit that can use an SPST switch (non-momentary) to generate a single pulse of a desired width.
Thanks!