ELECTRONICS QUESTION: Light sensor makes RR clock silent at night

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Robert Gift

former OL presenter
#1
At a garage sale a railroad-themed quartz clock was given to me.

Every daylight hour it sounds distorted train sounds: choo-choo, bell, etc. (Now I know why they got rid of it!)

Also, a mee-mool light (o)T(o) on the face flashes.

I removed the speaker. Mee-mool light still flashes but not after dark. I want it to flash on every hour.

If I short the light detector, will that represent daylight and the (o)T(o) flashes?

Or should that detector lead be opened?

Thank you.
 

kenw

5th Generation Texian
#2
It's hard to tell as they can be made to work either way. try this: attach some test wire across the leads of the sensor and see it that works. If it doesn't, remove the test wire and clip/cut one of the sensor leads. One almost has to work. Let us know.
 



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