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  1. Y

    Signal lenght detection

    Hmmm, no it does not work. I noticed that applying gnd to reset pin turns the output pin to gnd. And I assume that the moment the reset pin is at Vcc again, the cycle starts and output pin is at Vcc...
  2. Y

    Signal lenght detection

    Thank you for the answers. I think I might go with the 555 timer option, as it would take less room on the board, and adjusting the time period is so much easier. As was mentioned before the LM3914 activates the pins by grounding them. So a transistor is needed to convert this to positive...
  3. Y

    Signal lenght detection

    I have a project which I would like to use as a switch to turn on another device. It consists of a microphone, amplifier, a led bar display driver and a transistor as a switch in the end. The idea is that the amplified microphone signal is "filtered" by the bar display driver (LM3914), which...
  4. Y

    Long input activated circuit

    Hmmmm, I've been going through these answers and I have to admit that I can't figure out what you meant. It seems that my understanding of analogue circuits is not at adequate level on this. Could you be so kind and elaborate a little?
  5. Y

    Timer with infinite inputs

    I have an animal trap that is a spring activated device, and I am planning a circuit that would call me when it has been activated. The spring of the trap is part of a circuit, and when the spring retracts it opens the circuit. So I get for example 5V when the device has not been activated...
  6. Y

    Long input activated circuit

    Thanks for all the answers. A simplified picture of my trigger circuit is attached. As you can see I've kept this as analogue circuit, and I'd like to keep it that way. I use PICs for my other projects so I've had the option to add a microcontroller, but decided against it. A very short...
  7. Y

    Long input activated circuit

    I've built a voice operated switch for a clay pigeon thrower. It consists of a microphone, amplifier, bar display driver and a transistor that activates the thrower when a high enough volume is detected by the microphone. The idea is that the shooter could vocally activate the thrower. Now the...
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