I have this miniature camera but lost the cable connector. How can I find out which of the leads are positive, negative and video signals?

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  • 1
    \$\begingroup\$ Read the datasheet? \$\endgroup\$
    – Phil Frost
    Feb 6, 2014 at 19:01

1 Answer 1


Looking at the back of the camera (connector side):

Positive - connected to the bottom side (anode) of the tube-looking diode just above the connector. This is a common practice to place diodes on the positive terminal to protect device from reversed polarity. There is also a voltage regulator IC nearby which definitely tells that we are looking at power line.

Negative - connected to all mounting holes and to the negative side of smd capacitors above and below the voltage regulator IC. Grey line marks positive terminal on these capacitors unlike the usual round electrolytic caps.

Video out - most probably pin 4 of the connector if counting from top, you will need to check it yourself by connecting to some video input you have around.

Use buzzer mode of your tester to find out exact pins of the connector.

  • \$\begingroup\$ +1 This makes a good answer because you explained how you determined the pins, with examples. Helpful for more than just this isolated case. \$\endgroup\$
    – JYelton
    Feb 6, 2014 at 21:06

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