Three-wire forward and reverse LED lamp string control circuit

Abstract

The invention is applicable to the technical field of LED lamp control, and provides a three-wire forward and reverse LED lamp string control circuit. The circuit comprises an external power supply, asingle chip microcomputer, a driving circuit and an LED lamp bank circuit, wherein the driving circuit comprises a first field effect transistor, a third field effect transistor, a fifth field effecttransistor and a seventh field effect transistor of a P-type channel, and a second field effect transistor, a fourth field effect transistor and a sixth field effect transistor of an N-type channel;a first port is formed in the wire between the drain electrode of the second field effect transistor and the drain electrode of the third field effect transistor, a second port is formed in the wire between the drain electrode of the fourth field effect transistor and the drain electrode of the fifth field effect transistor, and a third port is formed in the wire between the drain electrode of thesixth field effect transistor and the drain electrode of the seventh field effect transistor; and the LED lamp bank circuit is connected with the first port, the second port and the third port. By adopting the technical scheme provided by the invention, three-path, four-path, five-path or six-path LED light emitting can be realized.

Description

technical field [0001] The invention belongs to the technical field of LED lamp control, and in particular relates to a three-wire forward and reverse LED lamp string control circuit. Background technique [0002] Decorative lantern is a kind of decorative lamp that is connected in series or in parallel by multiple lamp beads. However, in the prior art, five-wire and four-way methods are mostly used to realize four-way driving, which requires 5 wires, and six-wire and five-way methods are mostly used to realize five-way driving, which requires 6 wires, and 7 wires are needed to realize six-way driving. This kind of circuit wiring structure is complicated, which correspondingly causes the use cost of the LED light string to be too high. Moreover, it is difficult for the LED colored lights currently on the market to achieve the effect of changing the colors of various colored lights through a single control circuit, and the light emitting mode is single. Therefore, it is nec...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the embodiments of the present invention is to provide a three-wire forward and reverse LED light string control circuit, aiming to solve the problem of complex wiring structure and high cost in the prior art when the LED light string control circuit realizes multi-channel drive

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