Classroom blackboard LED lamp band driving circuit possessing protection effect

Abstract

The invention discloses a classroom blackboard LED lamp band driving circuit possessing a protection effect. The circuit comprises a bridge type rectification circuit, a voltage detection circuit, a power supply circuit, a microcontroller and a power conditioning circuit. A positive output terminal of the bridge type rectification circuit is connected to an input terminal of the voltage detectioncircuit, an input terminal of the power supply circuit and a positive input terminal of a blackboard LED lamp band. An output terminal of the voltage detection circuit and an output terminal of the power supply circuit are connected to the microcontroller. An output terminal of the microcontroller is connected to a signal control terminal of the power conditioning circuit. A negative output terminal of the bridge type rectification circuit is connected to an input terminal of the power conditioning circuit. An output terminal of the power conditioning circuit is connected to a negative input terminal of the blackboard LED lamp band. The voltage detection circuit comprises a first resistor, a second resistor, a third resistor, a first capacitor, a second capacitor, a first diode, a first power supply and a first voltage output terminal. In the invention, the circuit structure is simple, cost is low, and safety and reliability of the circuit are high.

Description

technical field [0001] The invention relates to the field of education, in particular to a classroom blackboard LED light strip driving circuit with protective functions. Background technique [0002] Classroom blackboard LED light strip is a lamp professionally used in classroom blackboard lighting. It is positioned in ordinary classrooms, music classrooms, natural classrooms, science and technology classrooms, psychological consultation rooms, offices, meeting rooms, art rooms, laboratories and other environments, and can replace the original lighting places using fluorescent tubes. The use of environmentally friendly high-tech LED light source and special optical design makes the lamp an integrated lamp with anti-glare, high energy saving, corrosion resistance and beautiful curve shape. LED light strips on blackboards in classrooms need to be driven by a drive circuit to work normally. The drive circuit structure of traditional blackboard LED light strips in classrooms i...

AI Technical Summary

Problems solved by technology

Classroom blackboard LED light strips all need the driving circuit to work normally. The driving circuit structure of traditional classroom blackboard LED light strips is relatively complicated, and the hardware cost is relatively high.

In addition, the drive circuit of the traditional classroom blackboard LED light strip lacks the corresponding circuit protection function, resulting in low circuit safety and reliability.

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