Review on DIYmall Pack of 10 HC-SR501 PIR Infrared IR Sensor Body Motion Modules - Arduino Raspberry Pi Compatible by Larry Blanco

Motion sensors work as expected, used similar ones before. Soldered the light sensor in place RL. When there is light, no movement is triggered. When there is no light, movement is triggered. The included delay time potentiometer is 105 (1MΩ), so it can be adjusted from 0.5s to 200s. Though it doesn't seem as fickle as it should be. It is very difficult to narrow down the setting from 1 to 200 seconds. I had pin jumpers, not the solder jumpers listed in the description. However, this doesn't seem to affect the device. It worked as a permanent trigger regardless of the jumper position. I deduct a star for that. Consumes 130uA at 5V supply voltage, so a decent 3.3V LDO voltage regulator is used.