Remote Control Customized Alarm System
One of our customers wants to customize an alarm system. He presented his own idea to us. He needs two receivers on the PCB, using transistor in the receiver instead of relay to reduce the consumption because he wants low consumption version when using that alarm. The PCB should be as small as possible. The alarm working current will be about 270ma. When press button one on the keyfob, receiver 2 is to open the switch to turn on receiver 1. Receiver 2 is to close the normally open contact(turn on the alarm) when receiver 2 receives a signal from the PIR and closed the alarm after 2 minutes. Press button 1 again to open the contact (SILENCE THE ALARM) Press button 2 to momentarily close the normally open contact (Test Alarm). Requirement: Receiver must be acceptable for the first signal only no matter how many signals are sent during alarming time. It will receive signal again after reopening. (Picture 1: original picture) As for his requirement, we retrofit one kind of our produc...