Automatic control circuit

Abstract

The invention relates to an automatic control circuit. The automatic control circuit comprises a relay control switch (K) with an input end electrically connected with an alternating current power supply fire wire (L) and an output end electrically connected with a load, wherein one end of a relay coil in the relay control switch (K) is connected with an alternating current power supply earth wire (N) and the other end of the relay coil is electrically connected with a fire wire (L) via a first diode (D1) and a starting switch (K1) in sequence or is electrically connected with the output end of the control switch (K) via the first diode (D1) and a normally closed detection switch (K2) in sequence; and the control switch also comprises a first capacitor (C1) connected with the coil in parallel. The automatic control circuit has simple structure and low cost, is combined with various detection switches, has wide application range and greatly meets the automatic control requirements of old electrical appliance improvement or the traditional electrical appliances.

Description

technical field [0001] The invention relates to electronic circuits, in particular to an automatic control circuit. Background technique [0002] Now, most smart appliances with single-chip or digital circuits have realized automatic control and protection, but there are still a large number of traditional appliances that do not have automatic control or use their own unique circuits to achieve individual control. At present, there is no automatic control circuit with simple structure, low cost and wide applicability for conventional electrical appliances or such an automatic control circuit has been disclosed. Contents of the invention [0003] The technical problem to be solved by the present invention is how to provide an automatic control circuit with simple structure, low cost and wide application. [0004] The technical problem of the present invention is solved in this way: build an automatic control circuit, including the control switch whose input end is electric...

AI Technical Summary

Problems solved by technology

[0002] Now, most smart electrical appliances with single-chip or digital circuits have realized automatic control and protection, but there are still a large number of traditional electrical appliances that do not have automatic control or use their own unique circuits to achieve individual control

At present, there is no simple structure, low cost and widely applicable automatic control circuit for traditional electrical appliances or such automatic control circuit is disclosed

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