Electric circuit with swtich control

摘要

An electric circuit comprises a battery 1 supplying direct current, a switch 2 and at least one component 5. A code transmitter 3 is present between the switch 2 and the component 5 together with a code receiver 6, the circuit being arranged so that until the code is verified by the code receiver 6 the component 5 is not enabled. Receiver 6 consumes current only during a code-verification period following closing of switch 2.