Sometimes you need to control the lights (or other devices) of two points far remote from each other. It may be required in the long corridor, and in the garden, or even in a small modern apartment. This task will help to solve the proposed circuit. For Assembly you will need two toggle switches and a three-core cable. The rest is clear from the driven circuit.Recommend to read
THE LIGHT WILL ACTIVATE THE SIREN
The proposed German magazine "Funkamateur" light relay is activated when light falls on the photoresistor R1 (see diagram) — when this occurs, a loud siren sound. Transistors VT1, VT2...
FOURTH — ONCE
Usually mention the proverbial fifth wheel. However, some automakers use a formula, reflected in the name of our material. They really believe the fourth wheel in the car superfluous....
