The H8054 Mini PIR motion detection module is designed to provide basic motion detection to your project.
The HC-SR501 is a passive infro-red (PIR) sensor which is used to detect motion based on the infrared heat in the surrounding area.
This is a very small light sensor. A photo resistor (also known as a photodector, or photocell) changes resistance depending on the amount of light it is exposed to.
This set of wheelchair motors makes great heavy duty robot motors. One left motor and one right motor. They are right angle gear drives with a release and electric brakes. They are 24VDC and the operating speed is 120 RPM.
This is powerful wheelchair motor. They make great heavy-duty robot motors. 250W 120RPM motors with 17mm keyed shaft output. They are sold individually and have an electric brake mounted on the back.