CD4049 Hex Inverter
I seemed to be cursed to "randomly" pick up hex inverters from the buckets and try to make unique circuits from them.
So far I have made an uninspiring but surprisingly popular blinker (CD4069), and a cool train crossing indicator (CD40106).
Fortunately I found another great circuit this time - using the CD4049.
The premise of the circuit is a "cupboard light" that uses minimal power until it is activated by a momentary switch, and then it shines only for a pre-determined amount of time.
It's a pretty cool idea and it worked really well, although the timing for the "on" part of the ciruit seemed a bit "off".
I didn't explore the discrepancy between calculated time and measured time - perhaps NOT tying down the other inputs caused the issue. Not that it was really a problem for me, I would just experimentally change the values until I had the time I needed.
I think a potentiometer for R1 might be "vary" useful to change these times as well.
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