PIR Sensor

Link to PIR Sensor Schematic

Link to BiSS0001 - 1 Application Note

Link to BiSS0001 - 2 Application Note.

Link to BiSS0001 Schematic

Desensitizing the PIR and changing the output to 5V for MCU’s


When modified the V+ is not used and the V-- is + 5V output OUT V+ 5 volts at 50 ma maximum.



Remove the 51K resistor and replace it with 1K



Remove the 2 * 3055 transistors     Link the Base and Collector

Output positive 5 volts will now be on the output V-- terminal when the PIR
is activated and will stay on for about 1 second unless continually triggered.



The right end terminal is now the 5V+ output.
Output is now 5V+ when sensor triggered, 50ma maximum.