A motion sensor or an ultrasonic sensor to correctly detect a hand at about 1.3 meters?

Hello everyone I would like to know what would be better to correctly detect a hand at about 1.3 meters? A motion sensor or an ultrasonic sensor?🧐 I have the HC-SR04 and the HC-SR501. It's for my laser harp. Best regards.
Solution:
I think HC-SR04 is the best Solution cuz its working rang is ip to 3m so it will work fine
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3 Replies
Joseph Ogbonna
Joseph Ogbonna5mo ago
It depends on the alignment or position of the hand. Motion sensor might cover a verse area. But precision also is needed. I would go for Ultrasonic sensor though. But it's just based on your used case
Solution
aymen ammari
aymen ammari5mo ago
I think HC-SR04 is the best Solution cuz its working rang is ip to 3m so it will work fine
Camila_99$$
Camila_99$$5mo ago
Hi! Thank you @Joseph Ogbonna @aymen ammari for your input! I’ve decided to go with your suggestion and choose the HC-SR04 👌🏼
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