Hi houston, I replaced C33 by 1uf because you propose to me but this modification not affect. You know when is in test mode, the sensor get any movement. That why, this part of circuit included C33 have no delay. The signal on pin 3 of EM78P15E/S is instant. the pin 14 send the data burst to RF section every 20 seconds. Everythings is in the microprocessor program.
Hi Brian, The specification of SP554A is said, the motion wait 20 second between each trigger. Thank you any for suggestions.
