Encoder Metal Gearmotor 12V DC Low Speed 35RPM Gear Motor with Encoder for Arduino and 3D Printers

All good

I needed a gearmotor with positional feedback for an automated roller blinds project, so I bought one of these motors for testing. The motor works, and it's performing at an acceptable level. I was able to successfully read positional feedback with a micro-controller. The noise level is somewhat normal for a DC motor of its kind, not silent but not loud. I'd say it's similar to pololu's 25D LP 12V 33RPM gearmotor, but with 75% of the torque at any given current level. My test setup is pictured here. At zero load, the motor draws 12V 50-60mA. When hoisting the 361g measuring tape over a 48mm diameter wheel, it draws 12V 110-120mA. I'd estimate that it draws 12V 0.45A - 0.6A at the rated load in the description (4.5 kg*cm). It's not a bad idea to have a buck/boost converter with a current limiter set to ~0.45A, so that your motor won't burn itself out in case of a stall.