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Thread: Scary Terry sound to servo board

  1. #21
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    Is there a way to test voltage on the 3 pins for the servo? To see if output is correct.

  2. #22
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    Default Re: Scary Terry sound to servo board

    Pin 3 of the servo header is a PWM signal and would require a scope to get a proper reading. I have been looking at your picture and am having trouble following the wiring. Its difficult to tell where all of the wires go. I see several very large solder blobs that may be shorts but I cant tell for sure. I think the best thing to do at this point is get a meter out and start taking some readings.

    you should have 5 volts at the following places:
    LM4558 pin #8
    4066 pin #14
    555 pin #4 and 8

    with the power disconnected you should have 0 ohms of resistance to ground at the following places:

    LM4558 pin #4
    4066 pins 2,5,6, and 7
    555 pin 1
    Blinky Flashy on a budget since 2009
    2009: 32 channels of Grench
    2010: 80 channels of home etched Ren-16 Simple and Home etched SSRneons.
    [URL="http://www.vimeo.com/user2720474/videos"]My videos [/URL]

  3. #23
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    Default Re: Scary Terry sound to servo board

    Quote Originally Posted by LightUpMA View Post
    Is there a way to test voltage on the 3 pins for the servo? To see if output is correct.
    Yea 2 pins should be power, and one signal.
    B= -
    R= +
    Y= Signal
    You can use a voltage meter to make sure the voltage is correct by sticking the probes on B and R. But y requires a different tactic.

  4. #24
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    Quote Originally Posted by tstraub View Post
    Pin 3 of the servo header is a PWM signal and would require a scope to get a proper reading. I have been looking at your picture and am having trouble following the wiring. Its difficult to tell where all of the wires go. I see several very large solder blobs that may be shorts but I cant tell for sure. I think the best thing to do at this point is get a meter out and start taking some readings.

    you should have 5 volts at the following places:
    LM4558 pin #8
    4066 pin #14
    555 pin #4 and 8

    with the power disconnected you should have 0 ohms of resistance to ground at the following places:

    LM4558 pin #4
    4066 pins 2,5,6, and 7
    555 pin 1
    Well the big blobs are solder bridges between two points close by that are suppose to be connected. I'm so frustrated lol. I remember reading a while back about a board house that will build small boards I think 3x3 for low fees. About to have one made up.

    I'll do those tests u suggested and then make sure no solder bridges.

    Thanks again Tyler!

  5. #25
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    Quote Originally Posted by tstraub View Post
    .

    you should have 5 volts at the following places:
    LM4558 pin #8
    4066 pin #14
    555 pin #4 and 8

    with the power disconnected you should have 0 ohms of resistance to ground at the following places:

    LM4558 pin #4
    4066 pins 2,5,6, and 7
    555 pin 1

    I have 5 volts at all those places but oddly I tested red and black pins for servo output and found 9v!

  6. #26
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    Quote Originally Posted by tstraub View Post
    Pin 3 of the servo header is a PWM signal and would require a scope to get a proper reading. I have been looking at your picture and am having trouble following the wiring. Its difficult to tell where all of the wires go. I see several very large solder blobs that may be shorts but I cant tell for sure. I think the best thing to do at this point is get a meter out and start taking some readings.

    you should have 5 volts at the following places:
    LM4558 pin #8
    4066 pin #14
    555 pin #4 and 8

    with the power disconnected you should have 0 ohms of resistance to ground at the following places:

    LM4558 pin #4
    4066 pins 2,5,6, and 7
    555 pin 1
    Got it! Looks like the ground to the 3rd pin for servo output wasnt quite right. Thank u sooo much!! I'll send u a pic when its up an running.

    Also can I submit a mirror image of board layout for ur wiki? I think having to reverse what I'm looking at to wire it caused the mistake. As soon as I was looking at the mirror image it became clear.

  7. #27
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    Default Re: Scary Terry sound to servo board

    Here's a picture of the servo board (mirror image), as you would view it from the back for wiring purposes.


    servoboard_reverse.jpg

  8. #28
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    Default Re: Scary Terry sound to servo board

    I'm. Glad to hear you got it working
    Blinky Flashy on a budget since 2009
    2009: 32 channels of Grench
    2010: 80 channels of home etched Ren-16 Simple and Home etched SSRneons.
    [URL="http://www.vimeo.com/user2720474/videos"]My videos [/URL]

  9. #29
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    Default Re: Scary Terry sound to servo board

    Does anyone know what happened to the scary terry boards or did anyone end up making a group of these up ?

  10. #30
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    Default Re: Scary Terry sound to servo board

    I ended up making mine from a breadboard. It worked the first year but since then has not worked right. I would be interested in getting one of these made-up as well.

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