First, I want to mention my limited understanding of all this. I want to make a simple circuit for my car. Currently, my car has a headlamp switch independent of ignition, which can result in battery drain if headlamps are accidentally left lit. I want to add a circuit so that if ignition is off and the headlamps are lit there is a buzzer sound and LCD displaying warning. The buzzer and LCD should go to sleep after 30 seconds of ignition turning off.
As I am dealing with a 12V car battery and my circuit comprise of microcontroller operating at 5V I have a bit of problem where I am adding 3 voltage regulators. In my opinion a much better design is out there which is why I am posting this thread. (I know a microcontroller is an overkill given simple nature of problem, but I am a programmer and I plan to add a gps coupled with the same microcontroller and LCD in the near future).
Attached is the concept that I need improvement on as a jpeg image. Thanks in advance.
As I am dealing with a 12V car battery and my circuit comprise of microcontroller operating at 5V I have a bit of problem where I am adding 3 voltage regulators. In my opinion a much better design is out there which is why I am posting this thread. (I know a microcontroller is an overkill given simple nature of problem, but I am a programmer and I plan to add a gps coupled with the same microcontroller and LCD in the near future).
Attached is the concept that I need improvement on as a jpeg image. Thanks in advance.
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