Momentum is one of the physics topics that students can better understand with practical activities. The problem found in using the ticker timer as a speed gauge in the collision practicum is that the measurement process interferes with the system being measured. This research develops a collision practicum tool using a microcontroller and ultrasonic sensor as a distance recorder. https://www.bekindtopets.com/best-grab-Pink-Floyd-Relics-T-Shirt-hot-buy/