JPH0132083Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a flashing device using a transistor.

Conventional configurations and their problems Various flashing devices using transistors have been devised in the past.

The conventional neon bulb flashing device as described above will be described below with reference to the drawings.

FIG. 1 shows a conventional neon bulb flashing device. In FIG. 1, 1 and 2 are power supplies, 3 is a neon bulb, 4, 5, and 6 are transistors, 7, 8, and 9 are capacitors, and 10, 11, 12, 13, and 14 are resistors.

In the neon bulb flashing device constructed as described above, the circuit A surrounded by the dotted line is an unstable multivibrator oscillation circuit, and its operation is known. The transistor 4 is driven by the circuit A, and the neon bulb blinks.

However, the above configuration requires three transistors and three capacitors, so
It is expensive and requires considerable space. Further, the neon bulb 3 had the disadvantage that it could only be used for blinking purposes, blinking only when the circuit A oscillated.

On the other hand, there has been a desire for a low-cost, space-saving flashing device in which the light-emitting element for regular lighting can also be used for flashing.

Purpose of the invention In view of the above-mentioned drawbacks, the present invention aims to provide a low-cost, space-saving flashing device in which the light emitting element for regular lighting can also be used for flashing.

Structure of the Invention In order to achieve the above object, the present invention connects a series circuit of a resistor and a light emitting element to a first power supply, connects the collector of the first transistor to the connection point of the resistor and the light emitting element, and connects the collector of the first transistor to the connection point of the resistor and the light emitting element. The emitter of the first transistor is connected to one end of the first and second power supplies via a resistor, the base of the first transistor is connected to the collector of the second transistor, and the emitter of the second transistor is connected to one end of the first and second power supplies through a resistor. The emitter of the first transistor is connected through a resistor, and the base of a second transistor is connected through another resistor, and the base of the second transistor is connected to a capacitor. The configuration is such that it is connected to the other end of the second power supply via the power supply.

Configuration of Embodiment Hereinafter, an embodiment of the present invention will be described with reference to FIG. 2 of the drawings.

Reference numeral 15 denotes a DC power source which is a first power source. A series circuit of a resistor 21 and a light emitting element 17 which is a load is connected to this DC power source 15. The collector of transistor 18 is connected. The emitter of the first transistor 18 is connected to one side of the DC power supply 15 via a resistor 25, and the base is connected to the collector of the second transistor 19. 2nd above
The emitter of the transistor 19 is connected via a resistor 22 to the + side of the processing circuit output 16, which is a second power source, and is also connected to the base via resistors 23 and 24, and the connection point between the resistors 23 and 24 is 1st
The emitter of the transistor 18 is connected to the emitter of the transistor 18. Further, the base of the second transistor 19 is connected to the + side of the processing circuit output 16 via a capacitor 20, and one side of the processing circuit output 16 is connected to one side of the DC power supply 15. The above light emitting element 1
The following explanation will be given assuming that 7 is a neon bulb.

The operation of the flashing device configured as above will be described below.

First, when the processing circuit output 16 is zero, the circuit B surrounded by the dotted line does not operate, and the DC power supply 15 and the resistor 2
1. Since the circuit includes only the neon bulb 17, the neon bulb 17 is lit. Next, when the processing circuit output 16 is applied, the second transistor 19 is off while the capacitor 20 is being charged, and therefore the first transistor 18 is also turned off at the same time, and the neon bulb 17 is turned on at the same time. When the capacitor 20 starts discharging, the second transistor 19 turns on, and at the same time the first transistor 18 turns on, and the current from the DC power supply 15 flows through the resistor 21, the collector-emitter of the first transistor 18, and the resistor 25. , the neon bulb 17 goes out and continues until the capacitor 20 starts charging again. As above, capacitor 20
The charging and discharging of is repeated, and the neon bulb 17 blinks.

As described above, according to this embodiment, the blinking circuit is configured with two transistors, one capacitor, and five resistors, thereby achieving low cost and space saving, and furthermore, it is possible to achieve low cost and space saving. It can be used both for flashing bulbs and flashing bulbs.

Effects of the Invention As described above, the present invention achieves low cost and space saving by configuring the blinking device with an oscillation circuit consisting of two transistors and one capacitor. In addition, by adding the circuit device of the present invention to a neon bulb for constant lighting, it is possible to control blinking and constant lighting depending on the presence or absence of DC voltage application.
It has great practical effects, such as warnings when equipment is abnormal.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a conventional neon bulb flashing device, and FIG. 2 is a circuit diagram of a flashing device according to an embodiment of the present invention. 15...first power supply, 16...second power supply, 1
7... Light emitting element, 18... First transistor,
19...Second transistor, 20...Capacitor, 21, 22, 23, 24, 25...Resistor.

Claims (1)

[Scope of utility model registration request] A series circuit of a resistor and a light emitting element is connected to a first power supply, a collector of a first transistor is connected to a connection point between the resistor and the light emitting element, and the emitter of the first transistor is connected to the first transistor through the resistor. The base of the first transistor is connected to the collector of the second transistor, the emitter of the second transistor is connected to the other end of the second power supply through a resistor, and the emitter of the second transistor is connected to one end of the second power supply through a resistor. through the series circuit of the second
The connection point of the two resistors is connected to the emitter of the first transistor, and the base of the second transistor is connected to the other end of the second power supply via a capacitor. Flashing device.