Hey guys I just found this site. I am having trouble with my Project for school. I have to design a burglar alarm circuit. The requirements are: must not exceed 9volts, alarm must sound 10secs after it is triggered and go off for 10 sec. It must be cheap like under $20-$30 to construct. And no 555 timers may be used.
So far I have a 9 volt battery, 1 - 1M Ohm Resistor in series with a 10-micro farad Capacitor. My siren is connected across my capacitor. and i have a switch at the positive terminal of the battery ran in series with the resistor. but every time i hit the switch i get no delay. Please help.
Thanks in adv.,
D
So far I have a 9 volt battery, 1 - 1M Ohm Resistor in series with a 10-micro farad Capacitor. My siren is connected across my capacitor. and i have a switch at the positive terminal of the battery ran in series with the resistor. but every time i hit the switch i get no delay. Please help.
Thanks in adv.,
D