Hi everyone I had an idea to make an audible alarm that tells you where a cold spot ie on an inside window sill compared to say 100mm away where the curtains are and this could start off with maybe a very slow click click but the minute that a very cold spot is detected then the circuits frequency increases rapidly along with the volume..i would appreciate any help as yet i.ve not come up with a circuit yet as I am just starting out trying to developing my ideas. thanks in advance.
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