CN2884785Y - An ice strip light control circuit - Google Patents

Abstract

The utility model discloses a control circuit for an ice strip lamp. The power supply of the control circuit adopts a DC power supply, and the power supply is firstly filtered by resistance and capacitance and then connected to the power supply pin of a micro-processing chip MCU, and the input pin of the micro-processing chip MCU is passed through an adjustable resistance VR1. It is connected with the control button of the ice strip light string, and the signal output by the output pin of the micro-processing chip MCU is connected with the light bulb of the light string after being amplified. The control circuit provided by the utility model adopts a DC power supply to avoid flickering due to voltage fluctuations. The differential input terminal of the micro-processing chip MCU of the control circuit is connected to the adjustable resistor controlled by the control button, which is convenient for adjusting the light string. Shiny, changing its dynamic effect. The control circuit of the utility model has low power consumption and high safety.

Description

An ice strip light control circuit

technical field

The utility model relates to the technical field of decorative lighting, in particular to a control circuit of decorative lamp strings connected in series.

Background technique

Decorative colored light strings are more and more popular among people as a kind of festive decorative lighting supplies. In recent years, in order to increase the festive atmosphere of the light strings, people often arrange the light strings in various shapes, such as zigzag, circular, mesh shapes and so on. Some also install control circuits in the light strings to realize the brightness switching of different bulbs in the light strings and increase the dynamic effect.

The currently used LED colored light strings generally use alternating current to directly connect the light strings, resulting in the LED bulbs often flickering due to alternating voltages, and at the same time, the alternating current will cause the LED bulbs to generate reverse voltage, thereby reducing the life of the bulbs.

Chinese Patent No. CN03211402.8 Patent "Single Line Controls Multiple Variations of the Light Strip" discloses a variety of variable light strips. The plastic outer layer is equipped with several control circuits and light emitters, and several control circuits are controlled by one control line. , The luminous body and the control circuit form a light-emitting unit, the light strip is composed of multiple light-emitting units, and the multiple light-emitting units are connected by three wires, including two power lines and one control line. It can realize the chasing and flashing of multiple street lamps, but the structure is relatively complicated, which makes the energy consumption of the entire lamp strip high and increases the production cost, so the practicability is not strong.

Utility model content

The technical problem to be solved by the utility model is to provide a control circuit structure with simple structure, low power consumption and the ability to realize dynamic jumping of light strings.

The utility model is achieved through the following technical solutions:

Design a control circuit for an ice strip light. The power supply of the control circuit adopts a DC power supply. The power supply is first filtered by a resistor and capacitor and then connected to the power supply pin of the micro-processing chip MCU. The input pin of the micro-processing chip MCU is connected to the ice strip light through an adjustable resistor VR1. The control button of the string is connected, and the signal output by the output pin of the micro-processing chip MCU is connected with the light bulb of the light string after being amplified.

Compared with the prior art, the utility model has the following significant advantages:

The control circuit provided by the utility model adopts a DC power supply to avoid flickering due to voltage fluctuations, and the differential input terminal of the control circuit microprocessing chip MCU is connected to an adjustable resistor controlled by a control button, which is convenient for adjusting the flickering of the light string. Bright, change its dynamic effect. The control circuit of the utility model has low power consumption and high safety.

Description of drawings

Fig. 1 is the schematic diagram of circuit principle of the present utility model;

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail through embodiment.

Referring to Figure 1, an ice strip light control circuit includes a light bulb and a power supply connected to the light bulb. The power supply of the control circuit is powered by a DC power supply VCC, and a power supply signal is drawn out to be directly connected to the light bulb L1 to provide work for the light bulb L1. power supply. The other power supply is connected to the power supply pin 1 of the micro-processing chip MCU after current limiting and voltage dividing by the resistors R1 and R2 to provide working power for the micro-processing chip MCU. The signal sent by the trigger signal terminal X is superimposed to the power supply pin of the micro-processing chip MCU through the capacitors C2 and C3.

The adjustable resistor VR1 is connected between the input pins 2 and 3 of the micro-processing chip MCU, and the adjustable resistor VR1 is connected with the control button of the ice strip light string, and the signal output from the output pin 5 of the micro-processing chip MCU is amplified by the transistor Q3 Afterwards, the light bulb L2 is turned on by driving the thyristor Q7.

When working, the light bulb L1 is powered on and the light is always on. At the same time, the power pin of the microprocessor chip MCU is connected, and the adjustable resistor VR1 is in a certain position. button to change the input value between the differential input terminals 2 and 3 of the micro-processing chip MCU, the micro-processing chip receives the signal and processes it, outputs the changed signal from the output terminal 5, and sends it to the thyristor Q7 after being amplified by the triode Q3, which can be The thyristor Q7 conducts and works, the bulb L2 lights up, and the thyristor does not conduct and the bulb L2 goes out. The light bulb L1 is always on, and the light bulb L2 is flashing, thus forming a dynamic effect.

Claims (2)

1, a kind of ice bar lamp control circuit, the power supply that includes bulb and be connected with bulb, it is characterized in that: also be provided with little process chip MCU between described power supply and the bulb, the regulation and control button of the input pin of little process chip MCU and ice bar lamp string links, and the signal of the output pin output of little process chip MCU connects with the bulb of lamp string after amplifying.

2, ice bar lamp control circuit according to claim 1, it is characterized in that: described power supply is DC power supply VCC, be connected with divider resistance R1, R2 between DC power supply VCC and the little process chip MCU supply pin, the regulation and control button of ice bar lamp string connects with the input pin of little process chip by adjustable resistance VR1, the output pin of little process chip MCU is connected in series with triode Q3, and the output of triode Q3 connects bulb L2 by controllable silicon Q7.