Review on 🏃 Highly Efficient DIYmall HC SR501 Motion Infrared Arduino for Enhanced Arduino Projects by Michael Schafer

They wasted several hours of my time when they didn't work. I tried having them run the Magic Mirror 2 Raspberry Pi to power it up from someone who fits, but got confused when after connecting it showed gpio output with gpio readall in putty high. I hooked it up to my multimeter to measure the ground voltage signal and no matter what I did they never went from 4.47 to 4.55V - ON ALL 5 SENSORS I HAVE. strange that it had to fall eventually, but no. I tried connecting it to "restart config" assuming the diagrams might be wrong, but no. I swapped power and ground, but no, the signal was just zero. I turned the potentiometers fully clockwise and then fully counterclockwise, but no, the signal voltage didn't budge. Every block I received was defective.