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TTL camera working at 5V not 3.3V

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  • TTL camera working at 5V not 3.3V

    Hi,

    I have just purchased a TTL camera and I used the following cable http://www.coolcomponents.co.uk/catalog/serial-cable-ftdi-cable-p-356.html to first connect it to the PC and run the test software. This worked fine. The VCC from the cable is 5V. I then disconnected VCC and GND and instead used a separate 3.3V power supply to power the camera. I then tried to use the PC test software to send a SYNCH, but got no response from the camera. Putting a scope on the RX camera pin, I could see the SYNCH signal going in ok, but when scoping the TX camera pin, I saw nothing. Now, I am a software engineer, not too hot on hardware and electronics (but learning!), so maybe this is a stupid thing to try, but I would be grateful for any advice.

    Many thanks

  • #2


    If you have a uCAM529 then you need to use 5v.

    Otherwise I'm wondering if you have disconnected the GND from the serial cable, which you shouldn't
    Mark

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    • #3


      Ah yes, I had disconnected the GND from the serial cable. All working now. Many thanks for your help.

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