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Smart & RC Servos

Size by stall torque at your supply voltage, then choose the bus: TTL or RS485 bus servos report their state, PWM servos only take commands.

How to compare smart & rc servos
Stall torque
The most torque the servo gives before it stops, at the stated voltage. Size the working load at a third to a half of it.
Bus servo
A servo with an ID on a shared serial bus (TTL or RS485). One cable chains many servos, and each reports position, speed, load, voltage and temperature.
PWM servo
A servo that takes a pulse-width signal on its own wire. It reports nothing back.
Control & comms
What's included
Rated torque N·m
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Peak torque N·m
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Gear ratio :1
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Weight kg
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Voltage V
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Rated current A
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