Hi, I'm very new to learning Arduino...
I am creating a sweet dispenser using 2 cans which with a servo will spin and rotate to release the sweets. I am planning on using a 9V battery to power this as the standard SM-S2309S isn't powerful enough. What servo would be best?
Thank you for all your help!
Abi
9V block batteries are for smoke alarms, and won't work with servos.
Most servos are rated at 6 or 7 V maximum and require 1 or more Amperes of current when starting.
A 4XAA battery pack is usually good for 1 or 2 servos.
Thank you! What is a good servo to buy? I need to find one more powerful than the SM-S2309S as this one can't turn the can?
First, make sure you are powering the servo properly. Do not use the 5V Arduino output, you can destroy the Arduino that way.
Use a separate servo power supply, like the 4XAA pack mentioned above, and connect the grounds. If the servo still does not have enough power, buy a higher torque servo.
Torque specifications for the SM-S2309S at 4.8V: 13.90 oz-in (1.00 kg-cm), at 6V: 16.70 oz-in (1.20 kg-cm).
jremington:
Use a separate servo power supply, like the 4XAA pack mentioned above, and connect the grounds. If the servo still does not have enough power, buy a higher torque servo.
And up the supply current to match the higher torque servo - they will need much more current.
For some reason the specifications for RC servos tend to omit the current requirement which is
very annoying as peak current draw is hard to measure with just a multimeter.