jbelectric777
Member
Hey all, I tried to post this a couple weeks ago but it hadda be changed to a JPEG, anyway here it is:
The 9V charges the capacitor and holds the output on terminal 3 low (0V) when the magnetic door/window contact/s is broken (open circuited) the discharge brings pin 3 (output) high, sending 9V to the base of the NPN resistor which in turn goes to a common relay that will latch and send power to a digital dialer and a loud db siren. This is the circuit I wanna use for all zones including door entry and exit and 24 hour tamper, in the case of the entry circuit/s I'll have a 30 to 60 second time delay to disarm the system using a higher value resistor (external) if the code isnt entered in the time allowed the system will go into alarm mode. As usual I'm a novice and want you guys/gals input on what ya think. Thanks in advance and looking forward to your thoughts and or idea's. Happy belated St Patricks Day !!! Jim
The 9V charges the capacitor and holds the output on terminal 3 low (0V) when the magnetic door/window contact/s is broken (open circuited) the discharge brings pin 3 (output) high, sending 9V to the base of the NPN resistor which in turn goes to a common relay that will latch and send power to a digital dialer and a loud db siren. This is the circuit I wanna use for all zones including door entry and exit and 24 hour tamper, in the case of the entry circuit/s I'll have a 30 to 60 second time delay to disarm the system using a higher value resistor (external) if the code isnt entered in the time allowed the system will go into alarm mode. As usual I'm a novice and want you guys/gals input on what ya think. Thanks in advance and looking forward to your thoughts and or idea's. Happy belated St Patricks Day !!! Jim