krogersaurus
New Member
i made a circuit:
the blue part is an astable multivibrator with a 555 timer IC. the blue part is a singing hallmark card. the purple thing, described as "the thingy", is actually a solid-state relay.
is it possible to figure out how long my 9V battery will last, supposing that it is completely new?
https://s835.photobucket.com/albums...current=scanof555timercardedited.jpg&newest=1
the blue part is an astable multivibrator with a 555 timer IC. the blue part is a singing hallmark card. the purple thing, described as "the thingy", is actually a solid-state relay.
is it possible to figure out how long my 9V battery will last, supposing that it is completely new?
https://s835.photobucket.com/albums...current=scanof555timercardedited.jpg&newest=1
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