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Electronic counter help Answered

I need some help, the basis of my invention is that my friend is always having countdowns (going away, birthday ect,) and i wanted to build a countdown clock for her. I was planning on using the countdown kit from qkit http://store.qkits.com/moreinfo.cfm?Product_ID=1679 and was gonna wire it up with buttons so she can manually move the counter up/down. my question is for saving power how wud i wire it so that it wud turn on when there is light but shuts down when there isnt (ex. when she opens her locker it turns on, closes it, no light, so it turns off), and i was also gonna have it say her name so any suggestions on where i can get a good easy to bulid/program led text screen,

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Jfaranda7

10 years ago

thanks lemonie that helped a lot. But i have a new general question, wouldn't turning it off reset the counter? so would i just have to find a way to just dim the screen but keep the rest of the counter powered?

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Jfaranda7

10 years ago

yes but how wud i get it reversed? i want the light to go on when it sense light, the oppisite of a night light

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its a lion

10 years ago

For the solar senor, you could probably just pull one out of a nightlight. I cannot remember the name of the piece right now. The programmable LED screen, I cannot really help you with.