Animatronic hand
hi everyone,
i'm building robot hand mimics human hand. i'm using simple glove sewed in flex sensors on each finger , actual robot hand (to move fingers) i'm using 5 servo motors towerpro sg 90.
i wrote simple code processing keep track gloves finger movement. arduino uno reads analog pins (where flex sensors connected) , moves servos accordingly. sends data processing graphs bending of each finger.
the servos connected external power supply. signal pins servos pwm pins on arduino uno.
now, works fine, except small detail. looking @ graph, finger bending smooth when servos aren't connected, when connect them - small pulses appear (more of them attach more servos). results in twitching motion of servo. if attach small diode instead of servo pulses still appear.
i don't understand causing , how remove it. :s
i've attached 2 photos of graphs 1 finger:
1) servos attached arduino (not powered on, though)
2) servos not attached arduino
the grounds connected.
i'm building robot hand mimics human hand. i'm using simple glove sewed in flex sensors on each finger , actual robot hand (to move fingers) i'm using 5 servo motors towerpro sg 90.
i wrote simple code processing keep track gloves finger movement. arduino uno reads analog pins (where flex sensors connected) , moves servos accordingly. sends data processing graphs bending of each finger.
the servos connected external power supply. signal pins servos pwm pins on arduino uno.
now, works fine, except small detail. looking @ graph, finger bending smooth when servos aren't connected, when connect them - small pulses appear (more of them attach more servos). results in twitching motion of servo. if attach small diode instead of servo pulses still appear.
i don't understand causing , how remove it. :s
i've attached 2 photos of graphs 1 finger:
1) servos attached arduino (not powered on, though)
2) servos not attached arduino
the grounds connected.
what plotting there - input flex sensors? suggest post drawing / circuit diagram showing how sensors , servos connected , powered.
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