In SX Microcontrollers, SX/B Compiler and SX-Key Tool, wchahla wrote:

Hello Bean ,

I found the problem.

Using an oscilloscope, I checked the serial output signal from both boards SX & BS2 and found that the signal from the SX board contains lots of noise , while the BS2 signal is almost perfect square signal.

I traced the voltage supply and found it noisy on the SX and DC stable on the BS2.

I added a 100 uf capacitor on the output of the voltage regualtor , and checked the output signal from the SX board and the result was great , almost a perfect square signal.

i connected the PSC and the motors roared  :) .

Thanks for your valuable tips.

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