I'm trying to find a circuit that when it detects light will continuously light up an LED, will be low DC voltage (3-6v, preferably 5v), and has a reset.
What I really want is a "You've Got Mail" indicator. So, when the mail person opens the mailbox the ambient sunlight will trigger the LED inside our house to go on and stay on. After, when I pick up the mail, I can reset the LED to off (for next time).
I kind of imagine having and LDR light sensor (or other) and 2 or more jellybean transistors to do the latching.
Is this possible and better yet how exactly?
NOTE: I've actually tried numerous times (and days) and went down numerous rabbit holes trying to find this exact circuit. I can find circuits that 2/3 does, but nothing that exactly does what I want. I'm trying to avoid latch circuits that need the LED pointed close and directly at the LDR, or latch circuits that need an electrical/mechanical relay switch.