FM90 DC Motor in Micro Servo Body
This tiny DC Motor in Micro Servo Body is an interesting motor – it’s the same size and shape as our micro servo (like the FS90, FS90R, SG92R) but it isn’t a servo. It’s more like a DC motor + plastic gear-train in a box. It’s not a super powerful motor, it would do well as a little robot wheel. It’s also a lot less expensive than a micro servo (continuous or non-continuous) because there is no control board inside. Controlling speed is done by PWM’ing the power leads, controlling direction is done by swapping the power polarity – just like any brushed DC motor.
Runs from 4-6VDC, we’ve powered it with a Lipoly and 3 alkaline, or 4 NiMH batteries with success. You cannot control this directly from a microcontroller pin! You must have a H-bridge such as a L293D or motor shield.
No flanges or horns included – it’s intended to mate with wheels. There’s a screw to attach once they’re plugged together. Build a robot vehicle of your own with these little motors driving it!
- Dimensions: 32.3mm x 12.3mm x 29.9mm / 1.3″ x 0.49″ x 1.2″
- Spline Count: 21
- Weight: 8.4g
- No load speed: 110RPM (4.8v) / 130RPM (6v)
- Running Current (at no load): 100mA (4.8v) / 120mA (6v)
- Peak Stall Torque (4.8v): 1.3 kg/cm / 18.09 oz/in
- Peak Stall Torque (6v): 1.5 kg/cm / 20.86 oz/in
- Stall Current: 550mA (4.8v) / 650mA (6v)