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Step 3Desolder the chip off the PCB
There is one 16 pin chip that does it all for the Tumbler. It takes the inputs from the receiver components and figures out what the signals are, then outputs to the two h-bridges to control the wheels.
Desoldering the chip is straight forward. However you do it, take a little care as the solder pads have other components close by or even on the same pad as the chip itself. You'll have to resolder it all back so they are connected when this is over.
I soldered back on a 16 pin socket because I wanted to put the chip back on the board to test it. Upon reflection, I should have put on standard 0.1" female headers. Something that I could plug jumper wires into easily. The socket works OK but it is not ideal. Once again, YMMV. You could resolder in wires that go directly into your controller. Whatever works, just make sure you resolder the other pins together that perhaps got desoldered on the PCB, the ones that shared the same solder pad with a chip pin.
Desoldering the chip is straight forward. However you do it, take a little care as the solder pads have other components close by or even on the same pad as the chip itself. You'll have to resolder it all back so they are connected when this is over.
I soldered back on a 16 pin socket because I wanted to put the chip back on the board to test it. Upon reflection, I should have put on standard 0.1" female headers. Something that I could plug jumper wires into easily. The socket works OK but it is not ideal. Once again, YMMV. You could resolder in wires that go directly into your controller. Whatever works, just make sure you resolder the other pins together that perhaps got desoldered on the PCB, the ones that shared the same solder pad with a chip pin.
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