All Circuit Components Are Controlled By One Switch. R 1 10 ωand r 2 20 ω. In describing this circuit you would say that each switch is in series with a lamp and the two switch lamp combinations are in parallel with each other.
You can also add as many 4 way switches as you like in place of any one shown in the circuits that follow. Various electrical or electronic circuits use switches to control or trigger the owl circuit. All the lights and beacon and power supplies are 12v the outsides including the switches are the timer circuit section while the middle part is the beacon and its power.
A good example of this type of control is the single phase manual starter shown in figure 3 1.
The simplest form of the circuit i m visualizing is shown below. Here is an example of a light in the middle of the run. Control circuits can be divided into two major types. All the lights and beacon and power supplies are 12v the outsides including the switches are the timer circuit section while the middle part is the beacon and its power.
