I am waiting on some ultrasonic module sensors for my robot.
I bought them on eBay:
https://www.ebay.com/itm/5X-Ultrasonic-Module-HC-SR04-Distance-Transducer-Sensor-For-Arduino-Robot/232126163617?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649
The estimated delivery is Wed, Jan 02.
Hope you have a good new year.
