Sensor default out analog value 0~4.5V Digital output or amplified output by LM358-DAT

jumper select:

  • D: LM3528 channel 1 as comprator
    • digital threashold output, LED on
    • tuning on-board trim-pot for the threashold.
  • D': LM3528 channel 1 as amplifier
    • you can use arduino analog read data, normal aroun 65x, block at 5-10


  • few boards' LED may not work, but the rest functions work well