how would stepping down the battery's input voltage affect the servos voltage input ? i think i still have some code problems since the servos is hardly not at full load all at once in any case which that can call a power issue or affect the servos functionality

thanks for responding okay so my range is 130 so my middle shifts should set to -65 and the calibs stays at zero right ? note that * nybble with no tail version * is my configration .. moving to the servo operating voltage is that could damage the servos ? i already uploaded various servo constent values to the servos and servos act diffrentely to each one so i knew that the operating voltage is okay , if i'm wrong what could i do if there is something to step down the voltage ?

thanks for the reply so basically the 771~ 2193 rang is only 130 degrees so also i need to change the 150 degrees and i'll benchmark and see the results

this problem considered as solved as there was a shortcut on board between the digital 1 pins

FT232RL , i have tried connect the board with only the uploader or turn on the battery without the uploader and also tried pressing the reset button still don't hear anything from the buzzer just the blue and the red led are light steady up beside the yellow led of the uploader doesn't even blink fast when i try to upload so i'm vry sure it's "on board" problem isn't it ? . what really happend right before that i was just trying to overwrite the writeinstinct to board to calibrate nybble right as the servo pins were switched . can that cause damage to the board by any way ?

ya all set up but i mean the board itself doesn't respond to any thing same thing with the buzzer

@Rongzhong Li yes that was the problem of some other small problems I figured it out thanks to john but what really confuse me now the servo joints wiring and I'M connecting them now based on this doc because it's v1_0 board and i'm not sure it's the right connections the nyboard defined as v1_0 in the code

now it's calibrating the MPU is it ok that it's long time to calibrate it ?

it's working now on115200 buad thanks very much for your help

already did that and in both 57600 buad and 74880 buad in serial monitor still got that weird symbols

that exactly what i get in terms of leds and i downloaded ch341ser i don't know if that is the same "USB-SERIAL CH340 (COM3)" and when i say ports i mean th port in arduino ide i only get com 3 port and then the seriel monitor have that weird symbols so i don't know where's the error here

the fdti uploader blink yellow for a second and then only lighting with red led