CN203787011U

CN203787011U - Crystal triode controlled pumping demonstrator

Info

Publication number: CN203787011U
Application number: CN201420150327.2U
Authority: CN
Inventors: 雷建设
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-03-31
Filing date: 2014-03-31
Publication date: 2014-08-20
Anticipated expiration: 2024-03-31

Abstract

The utility model relates to a pumping water supply device which is controlled by crystal triodes. The device comprises a water tower, a water tank, a motor and a water supply control circuit. One end of the water supply control circuit is connected with the water tower, and the other end is orderly connected with the motor and the water tank. A number of sensing probes are arranged on the water tower. The sensing probes are respectively electrically connected with the water supply control circuit. A voltage identifier and four crystal triodes are arranged in the water supply control circuit. Four crystal triodes are respectively a crystal triode B1, a crystal triode B2, a crystal triode B3 and a crystal triode B4. The first sensing probe, the crystal triode B1, the crystal triode B2 and the crystal triode B3 are orderly connected with the input end of the voltage identifier. The output end of the identifier is orderly connected with the crystal triode B4 and the motor. The output end of the crystal triode B4 is connected with the input end of the crystal triode B2. According to the utility model, the crystal triodes in the water supply control circuit can be used to control the motor to add water into the water tower.

Description

Transistor control pumping demonstration machine

Technical field

The utility model relates to a kind of water supply installation, particularly a kind of taking out type water supply installation that utilizes transistor control.

Background technology

Transistor is most important device in electronic circuit, its topmost function is that electric current amplifies and on-off action, at present in teaching demonstration, the amplification of transistor is very common, in the process of demonstrating and tell about, understood by student than being easier to, the on-off action of transistor is not too common, easily causes student's fascination, the education demonstrator that does not directly utilize the on-off action control pumping motor of transistor to make.

Summary of the invention

The utility model is intended to outstanding a kind of education demonstrator that utilizes transistor on-off action to realize.

Transistor control pumping demonstration machine described in the utility model, comprise water tower, water tank, motor and water supply control circuit, described water supply control circuit one end connects water tower, the other end connects motor and water tank successively, described water tower is provided with some inductive probes, described inductive probe is connected electrically on water supply control circuit respectively, in described water supply control circuit, be provided with a voltage identification device and four transistors, described four transistors are respectively transistor B1, transistor B2, transistor B3 and transistor B4, wherein the first inductive probe, transistor B1, transistor B2, transistor B3 is connected in turn with the input end of voltage identification device, the output terminal of voltage identification device connects transistor B4 and motor in turn, the output terminal of transistor B4 connects the input end of transistor B2, the second inductive probe is connected with the input end of voltage identification device, the 3rd inductive probe is connected with transistor B4 successively with power supply.。

Preferably, described the first inductive probe is upper limit inductive probe, the second inductive probe lower limit inductive probe, and the 3rd inductive probe is earth terminal inductive probe.

Preferably, described power supply is that output voltage is common No. 1 dry cell, accumulator jar or the voltage-stabilizing working power supply of 12V.

Or preferably, described motor is 12V electric pump.

Or further preferably, described transistor B1 is 9012PNP type triode, and B2 is 9012PNP type triode, and B3 is 9013NPN type triode, B4 is C3807 type NPN triode.

Preferably, described voltage identification device is composed in series by 1/2W5.1V voltage stabilizing diode (positive pole) and 1/4W4.7 resistance, and wherein the negative pole of voltage stabilizing diode is input end.

Triode control pumping demonstration machine described in the utility model, by water supply control circuit, water tower and water tank are linked together, when the inductive probe on water tower sense wait add water or stop adding water signal time, add water or stop adding water to water tower by water supply control circuit control water tank.

Brief description of the drawings

Fig. 1 is syndeton schematic diagram of the present utility model.

Fig. 2 is circuit connection diagram of the present utility model.

1-water tank in figure; 2-water tower; 3-motor; 4-water supply control circuit.

Embodiment

5 liters of plastics oil drums that intercept entirety 2/3 make underground water tank, 4/5 Huiyuan Orange Juice Beverage pail does water tower, power electric pump 12V difficult to understand does pumping motor, control circuit transistor B1 is that 9012 types, transistor B2 are that 9012 types, transistor B3 are that 9013 types, transistor B4 are that C3807 type, recognizer are that 5.1V voltage stabilizing diode and 1000 Ohmages are composed in series, use wire bonds on omnipotent wiring board the element of controller, they are separately fixed on the plank of the wide 20CM of long 40CM, water tower with iron sheet tea caddy do base by it higher than simulate formation water tank.Make a call to the fixing two-screw of two apertures at the parallel 2CM of being separated by of the high 3CM in the bottom of water tower and do earth terminal inductive probe and lower limit inductive probe 2, the top suitable position of water tower is played an aperture fixed screw as upper limit inductive probe, the correspondence position of their line line attachment plate.With flexible rubber hose connect water outlet of water tank in the water inlet of water tower top.It is common No. 1 dry cell, accumulator jar or the voltage-stabilizing working power supply of 12V that power supply selects voltage.

Transistor control pumping demonstration machine described in the utility model, transistor control pumping demonstration machine described in the utility model, comprise water tower, water tank, motor and water supply control circuit, described water supply control circuit one end connects water tower, the other end connects motor and water tank successively, described water tower is provided with some inductive probes, described inductive probe is connected electrically on water supply control circuit respectively, in described water supply control circuit, be provided with a recognizer and four transistors, described four transistors are respectively transistor B1, transistor B2, transistor B3 and transistor B4, wherein upper limit inductive probe, transistor B1, transistor B2, the input end of transistor B3 and recognizer is connected in turn, the output terminal of recognizer connects transistor B4 and motor in turn, the output terminal of transistor B4 connects the input end of transistor B2, lower limit inductive probe is connected with the input end of recognizer, earth terminal inductive probe is connected with transistor B4 successively with power cathode, and described power supply is that output voltage is common No. 1 dry cell, accumulator jar or the voltage-stabilizing working power supply of 12V.

The course of work, when cistern water level is during lower than lower limit inductive probe, the output of voltage identification device is greater than the high potential signal of 1v, transistor B4 conducting, pumping motor energising is drawn water, transistor B2 obtains low spot position signal conduction and makes transistor B3 conducting simultaneously, allow voltage identification device keep noble potential output, in order to avoid lower limit inductive probe contact water reduces recognizer current potential, transistor B4 is always in conducting state like this, motor draws water always, in the time that cistern water level rises to upper limit inductive probe, the base stage conducting of transistor B1, transistor B2 is ended to noble potential, transistor B3 does not work, recognizer output low spot position, motor stops pumping.When cistern water level is during lower than lower limit inductive probe, recognizer output high potential signal, transistor B4 conducting again, electrical power starts again to draw water, and moves in circles like this and carries out, and reaches the object of auto-controlled water-pumping.This circuit adopts the transistor composition of four different models, it in work, is all the principle of utilizing its switch performance, and the triode that shows NPN type is when base stage is during in noble potential, its collector and transmitter saturation conduction are when base stage is during in electronegative potential, the cut-off of its collector and transmitter, positive-negative-positive triode is when base stage is during in electronegative potential, its collector and transmitter saturation conduction, when base stage is in noble potential, its collector and transmitter cut-off.

When use, first pour 4/5ths water of volume into water tank 1, opening power, access direct current 12V electricity, in the time that water tower 2 is anhydrous, earth terminal inductive probe 1 is in high value state, transistor B4 base stage has operating voltage collector and emitter switch closure, and pumping for water pump, when water tower level is higher than lower limit inductive probe, during lower than upper limit inductive probe, transistor B3 base stage presents noble potential collector and emitter switch closure, allows recognizer keep noble potential output, and water pump continues to draw water; In the time that water level in water tower contacts with upper limit inductive probe, transistor 1 base stage obtains the conducting of low spot position, makes transistor B2 to noble potential, and transistor B3 does not work, recognizer output low spot position, and motor stops pumping.

Claims

1. transistor control pumping demonstration machine, comprise water tower (1), water tank (2), motor (3) and water supply control circuit (4), described water supply control circuit (4) one end connects water tower (1), the other end connects motor (3) and water tank (2) successively, it is characterized in that: described water tower (1) is provided with some inductive probes, described inductive probe is connected electrically on water supply control circuit (4) respectively, in described water supply control circuit (4), be provided with a voltage identification device and four transistors, described four transistors are respectively transistor B1, transistor B2, transistor B3 and transistor B4, wherein the first inductive probe, transistor B1, transistor B2, the input end of transistor B3 and recognizer is connected in turn, the output terminal of recognizer connects transistor B4 and motor in turn, the output terminal of transistor B4 connects the input end of transistor B2, the second inductive probe is connected with the input end of recognizer, the 3rd inductive probe is connected with transistor B4 successively with power supply.

2. transistor control pumping demonstration machine as claimed in claim 1, is characterized in that: described the first inductive probe is upper limit inductive probe, the second inductive probe lower limit inductive probe, and the 3rd inductive probe is earth terminal inductive probe.

3. transistor control pumping demonstration machine as claimed in claim 1, is characterized in that: described power supply is that output voltage is common No. 1 dry cell, accumulator jar or the voltage-stabilizing working power supply of 12V.

4. transistor control pumping demonstration machine as described in claim 1 or 2 or 3, is characterized in that: described motor (3) is 12V electric pump.

5. transistor control pumping demonstration machine as claimed in claim 4, is characterized in that: described transistor B1 is 9012PNP type triode, B2 is 9012PNP type triode, and B3 is 9013NPN type triode, and B4 is C3807 type NPN triode.

6. transistor control pumping demonstration machine as claimed in claim 1, is characterized in that: described voltage identification device is for to be composed in series by 1/2W5.1V voltage stabilizing diode and 1/4W4.7 resistance, and wherein the negative pole of voltage stabilizing diode is input end.