Touch lighting switch circuit 5

(5) Touch lighting switch circuit 5
    The circuit is shown in Figure 2-55. When the hand touches the conductive sheet Mi,
the electric lamp EL lights up. To turn off the light, just touch the conductive sheet
M2. Through the contacts of relay KA, high-power
electric lights can be driven.
    Normally, the electric light EL does not light up. When the hand touches the conductive sheet Mi
, the relay KA is closed and the lamp EL lights up; when the light is turned off,
the hand touches the conductive sheet Mz, KA loses power and is released, and the lamp EL
goes out.