stupid mistake. connected power reversed

Home Forums TinyG TinyG Support stupid mistake. connected power reversed

Tagged: 

Viewing 2 posts - 1 through 2 (of 2 total)
  • Author
    Posts
  • #9267
    duke0179
    Member

    Hi.
    I made a stupid mistake!
    V- to V+
    V+ to V-

    I heard sparking noise so I turned the power supply down.
    I realized something was wrong.

    As a result, D13 seemed to burnt badly.
    I had a hope that it would work correctly if I connect power in right way.

    I tried it, red and blue LEDs lighted, but D13 caught fire and lighted.

    I thought only a diode burnt. After D13 removed, there are three points to solder.

    two points seems to be GND and connected each other, opposite side seems to be plus DC Voltage.

    diode

    I have some diodes and might try one of them. but I don’t get what three solder points mean.

    Is there anyone who give me advice?

    #9270
    duke0179
    Member

    I got answer from Carl, and believe I have a solution now.

    Ordered sot-23 in local market.

    And I have to admit that the memo on the picture was wrong.

    two lead side flows plus current. It’s not GND.

    Here is speculation of circuit.

    circuit
    circuit2

    • This reply was modified 8 years, 10 months ago by duke0179.
Viewing 2 posts - 1 through 2 (of 2 total)
  • You must be logged in to reply to this topic.