Being able to enable/disable alarm zones.
Bunch of LEDs to show sensor/zone status.
These are good ideas
.... but will be quite tricky
Door chime mode option when user is home.
Selftest feature.
Auomatic lockout of a failed sensor.
Memory feature to let the user know that the alarm as tripped but had reset.
this is for GCSE not security for a bank
lol
need at least 2 chips for a grade a or b
ive got 4 and thats just for when the front door is opened...
555 monostable>555 astable>4510 up/down counter>4511 binary to display driver>7 seg display (gives 6 seconds for the user to de-activate alarm when front door is opened before the alarm goes off)
i need to link the output from the monostable to a NOT gate then to the alarm.... im going to get stuck on that part because i want the alarm to go off after the time period (after pin 3 goes back to low) so i will need a not gate to invert the signal to high but then before the door is opend, pin 3 will be low which will be inverted to high which will make the alarm go off!!!!! oops!