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No solder method for defective 3.3V regulator for APM

Posted by Franklin Neo on February 27, 2014 at 9:30pm

3V3.jpg?width=300

Discovered a method to provide an alternative 3.3V for powering the onboard Baro, Accelerometer, Compass when the built in 3.3V regulator TPS79133 fails.

I documented the details and equipment required here

http://flight.farbird.com/2014/02/repair-blown-33v-regulator-on-ardupilot.html

No solder method to provide alternative 3.3V source to the onboard sensors.

Tags: 33v, accelerometer, baro, compass, ins, mpu6000, regulator
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Comments

  • Developer
    John Arne Birkeland February 28, 2014 at 2:01am

    The article says:

    1. So if your embedded TPS79133 embedded 3.3V regulator is faulty...
    2. Test + voltage pins at I2C connector and pin 5 of TPS79133 to make sure voltage is no longer 3.3V
    3. Pry and remove the TPS79133 carefully without damaging other equipment (without soldering iron)
    4. Find an alternative 3.3V source to connect to the + voltage pin at the I2C connector of the APM and ensure both sources share the same ground.
    5. Jump in joy for reviving the APM.

    Be VERY careful with step 3. If you pry a component of the PCB board, you risk pulling the PCB solder pads of the board also. Doing so will make it more or less impossible to solder on a new 3.3v regulator later if you want to.

  • lppier February 27, 2014 at 11:54pm

    Awesome la Franklin...

This reply was deleted.