KR910007919Y1 - Apparatus for lighting system of vending machine - Google Patents

Abstract

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Description

Flashing Circuit of Vending Machine Using Photoconductive Effect and Microprocessor

1 is a lamp driving circuit using cds.

2 is a circuit diagram of the present invention.

3 is a program input flow diagram for driving a soft control unit.

4 is an on and off display of the operation display unit.

* Explanation of symbols for main parts of the drawings

1: cds 2: sensor driver

3: toggle switch 4: transistor

5: operational amplifier 6: inverter

7: 1 needle microprocessor 8: Relay

9: soft control unit 10: operation display and signal input unit

12: seven segment 13: setting switch

14: set switch 15: LED

16: fluorescent lamp 17: lamp

The present invention relates to a flashing circuit of a fluorescent lamp attached to a vending machine, and a circuit that enables the power saving of a microprocessor to solve the problem that the problem of the fluorescent lamp flashing circuit using the photoconductive effect cannot be turned off in the absence of a night user.

In the related art, a relay-driven fluorescent lamp is turned on when the ambient environment becomes dark by using a variable resistance value of a semiconductor device (eg, cds cell, cdse cell) to which electric resistance changes when light is applied. Referring to FIG. 1 showing the circuit operation, when the light hits cds (1), the cds (1) is turned off and the resistance value is several kW, so that no voltage is applied to the base of the transistor (4). It is not driven.

At this time, when the ambient environment becomes dark and the cds (1) is turned on, the resistance value of the cds (1) is about 200 kV, the 51K and 12V are divided, and a voltage of about 2.4V is applied to the base of the transistor 4.

When this voltage is applied, the transistor 4 is turned on so that the relay 8 is driven and the fluorescent lamp connected to the relay contact is turned on.

In this way, the fluorescent lamp blinker circuit applying the photoconductive effect cannot turn on and off without changing the environment around the cds. Especially in the case of vending machines, the lighting of the fluorescent lamp is unnecessary power consumption when there is no late night user. Since it is not necessary to turn on and off the light at a certain time because flickering by cds is unnecessary, a function of lighting and turning off is required at a certain time. This function is impossible for a circuit applying the photoconductive effect. In order to solve the conventional problems, the present invention merges the sensor driver 2 applying the photoconductive effect and the shaft control unit 9 applying the microprocessor as shown in FIG. 2 to the externally connected toggle switch 3. It is configured to select auto, manual off by 3 functions. The main operation function of the toggle switch (3) is the fluorescent lamp flashing by setting cds and power saving time in toggle switch automatic mode, and the power saving time in toggle switch on mode. Fluorescent lamp flashing by setting (disappearing of cds function) and fluorescent lamp complete sword (disappearing function by setting of cds function and power saving time) in toggle switch off mode. The operation is explained in detail through the circuit diagram of FIG. .

In the first cds drive unit (toggle switch auto mode), the cds (1) has a resistance of about 200K due to the operation of the cds (1) first, and the resistor R ₁ and the direct current 12V are divided to apply about 10V to the base of the transistor 4. And the transistor 4 is turned on. When the transistor 4 is turned on is applied to the Y ₁ is about 2.7V higher than the electric potential of about 1.3V association amplifier 5 of Y ₂ is off. When the operational amplifier 5 is turned off, since Y ₃ is normally high (about 5 V), the output of the inverter 6 becomes low (OV), so the relay 8 is driven and the fluorescent lamp is turned on. C ₁ is an electrolytic cone sensor for delaying the operation time of the associative amplifier 5. Second, since the output of the 1-chip microprocessor (7) becomes low (OV) and the inverter (6) becomes high (12V) at the time to turn off by the power saving time input in the microprocessor application driver (toggle switch-on mode), the relay Is not driven.

Third, fluorescent light off (toggle switch off mode) By placing the toggle switch 3 in the off position, the input of the inverter 6 remains low (OV), so the output of the inverter 6 remains high (12V) for cds and microprocessor applications. It is not operated by driving.

Fourth, driving by cds and driving by microprocessor application (toggle switch auto mode) If the position of the toggle switch 3 is in the auto mode, the single-chip microcomputer is operated in the state where the relay 8 is driven by the cds operation at night. When the output of the processor 7 goes low (OV), the input of the inverter 6 goes low (OV) and the output of the inverter 6 becomes high (+ 12V), so the relay 8 is turned off and the fluorescent lamp is turned off. do. Next, the program input method for driving the soft control unit 9 (refer to the flowchart of FIG. 3) will be described in detail. When the timer mode is selected by the mode switch 11 in the operation display and signal input unit 10 of FIG. The currently set contents are displayed as shown in FIG. 4 a. Here, the off time can be set by the switch 13, and when the set switch 14 is pressed after the off time is set, the off time is input and the operation display unit 10 is in the on time input mode as shown in FIG.

As described above, the present invention can obtain the effect of reducing the power consumption by turning off the time when the user does not need to turn on the fluorescent lamp since the user can turn on the fluorescent lamp any time by a program input.

Claims (1)

cds (1) through resistor (R ₁ ) and transistor (4) to resistors (R ₂ ), (R ₄ ), (R ₅ ), (R ₆ ) capacitor (C ₁ ) and operational amplifier (5) Connect a 1-chip microprocessor, resistor R ₈ , inverter 6, relay 8 to the sensor driver 2, operation display and signal input 10, and connect resistor R ₇ and capacitor C ₂ ) The vending machine fluorescent lamp flashing circuit characterized in that the soft control unit (9) connected in parallel configuration to enable the automatic, manual, off function by the toggle switch (3).