I'm working on a robotics project right now and my limited DIYer knowledge of electrical circuits is failing me. I need to power 7 Rage Standard Metal Gear Servos (RGRS104-16-6vm) and 4 RadioShack Micro Servos using a Tenergy 6V 3300mAh NiMH Battery Pack. I've made a diagram of the circuit I'd like to make, but I feel like there's more to this type of circuit than I've planned for. There are only 9 servo connections because two pairs of Rage Servos will be wired together to share the same battery and signal connection. I'm also open to using a different battery if that's what it takes to make the robot run smoothly (It has to use a rechargeable battery though; It's meant to be portable.) Also, the Arduino has it's own battery, so no worries there.
Would you please point out what I need to add to my circuit to make sure it works properly?
Thanks in advance!
Servo Power Board Diagram
More Info:
Rage Standard Metal Gear Servo RGRS104-16-6vm
Dimensions: 40.8 ×ばつ 20.1 ×ばつ 38 mm
Weight: 56 g
Operating Speed: 0.18sec/60degree (4.8V), 0.16sec/60degree (6V)
Stall Torque: 9kg.cm/125.2oz.in(4.8V), 10.2kg.cm/141.9oz.in(6V)
Operating Voltage: 4.8V~6V
Control System: Analog
Direction: CCW
Operating Angle: 180degree
Required Pulse: 500us-2500us
Bearing Type: 2BB
Gear Type: Metal
Motor Type: Carbon
Connector Wire Length: 30 cm.
RadioShack Micro Servo
Voltage: 4.8~6.0V
Torque: 1.5kg/cm at 4.8V; 1.8kg/cm at 6.0V
Speed: 0.12/60ТА at 4.8V; 0.10/60ТА at 6.0V
Size: 23x11.5x24mm
Weight: 8.6 g
Use Angle: <=160ТА
Tenergy 6V 3300mAh NiMH Battery Pack
Chemistry: Ni-MH
Cell Size: Sub-C
Nominal Voltage (V): 6
Capacity (mAh): 3300
Max Continuous Discharge Current: 6A
Battery Charging Current:
Standard: 1A
Weight: 10oz.
Dimensions: 112 x 46 x 23mm (LxWxT)
Connector: Hitech
Link to Diagram: https://i.sstatic.net/L4GtP.jpg
the Arduino Uno has (to my knowledge) only has about 6 PWM pins which is what you will need to drive the servo's through the signal pin.- Actually that's not true (and it took me by surprise too when I found out): The Arduino uses timer interrupts not PWM in the servo library. It's set to drive 12 servos per timer, and the '328P has 1 timer allocated to it, so can directly drive 12 servos on any pins of your choice no problem.