to insert the keys in the front door on a dark landing, and requires some kind of illumination. Well, when a box of matches or a lighter. This problem will not arise, if the door closer to the lock pin miniature flashlight button: fortunately now there are many suitable options fobs illuminated.
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If your old moped or motorcycle there is a warning light that tells the driver about turning on lights, it is not necessary to open the harness wiring and to connect additional warning...
AND CHARGES, AND THE CASE
Familiar to many hams, the situation: once the scheme is built, configured, but... to Squeeze it into some kind of "soap" not want to, but new to "diamond" the right frame there is...
