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Mini low cost PIR Sensor - PIR_YX-358A

AHT20_BMP280 logo AHT20_BMP280 logo

  • cheap +/- 1$
  • small
  • easy to use
  • easy to modify

Details

  • Working voltage:100-240V
  • Load power: 40W
  • Static current: < 50μA
  • Time delay: 45s
  • Induction angle: 110 °
  • Induction distance: 4-6M

know problem

Many devices have only a delay of ~20sec There are different versions of the PCB

kown facts

  • all versions have the same, very simple AC/DC PCB
  • all versions use the chip called SP015 A

The version that I got, possibly the newest one

  • 230V side

AHT20_BMP280 logo AHT20_BMP280 logo AHT20_BMP280 logo

  • 3.3V side (C1 is accidentally missing ^^)

AHT20_BMP280 logo AHT20_BMP280 logo AHT20_BMP280 logo AHT20_BMP280 logo

ONTIME MOD

technical details AHT20_BMP280 logo AHT20_BMP280 logo

how to mod, I use a 260K resistor and got around 45 secounds AHT20_BMP280 logo AHT20_BMP280 logo

Other Version

AHT20_BMP280 logo

Here the resistor R10 is responsible for the delay. To change the delay

  • 160K Ohm - 23 seconds
  • 220K Ohm - 30 seconds
  • 300K Ohm - 1 minute
  • 470K Ohm - 3 minutes

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