CN206639479U - 555 integrated package multiplication of voltage function presentation instrument - Google Patents

Abstract

A kind of 555 integrated package multiplication of voltage function presentation instrument are the utility model is related to, belong to Technical Teaching instrument field, it is characterized in that：Circuit is by dc source E, switch S, adjustable resistance R₁, resistance R₂, resistance R₃, integrated package I, capacitor C₁, capacitor C₂, capacitor C₃, capacitor C₄, diode D₁, diode D₂, voltmeter V₁, voltmeter V₂, oscillograph Q composition, integrated package I NE555, adjustable resistance R₁For changing voltmeter V₁Reading, oscillograph Q is used for demonstrating integrated package I 3 pin waveforms, voltmeter V₂Display and voltmeter V₁Multiple proportion, advantage and good effect are possessed by the utility model：Simple in construction, operation demonstration is convenient.

Description

555 integrated block voltage doubling function demonstrator

technical field

The utility model relates to a 555 integrated block voltage doubling function demonstration instrument, which belongs to the field of electronic technology teaching instruments.

Background technique

At present, in the teaching of electronic technology, there is no demonstration instrument for the voltage doubling function of the 555 manifold, and students cannot deeply understand the voltage doubling function of the 555 manifold. This demonstration instrument can demonstrate the voltage doubling function of the 555 manifold.

Utility model content

The purpose of the utility model is to provide a 555 integrated block voltage doubling function demonstrator, which can demonstrate the 555 integrated block voltage doubling function.

The purpose of this utility model is achieved in this way: the circuit consists of DC power supply E, switch S, adjustable resistance R ₁ , resistance R ₂ , resistance R ₃ , integrated block I, capacitor C ₁ , capacitor C ₂ , capacitor C ₃ , capacitor C ₄ , diode D ₁ , diode D ₂ , voltmeter V ₁ , voltmeter V ₂ , and oscilloscope Q. It is characterized in that: integrated block I, capacitor C ₁ , capacitor C ₂ , resistor R ₂ , and resistor R ₃ form a multivibrator, and the adjustable resistor R ₁ is used to change the reading of voltmeter V ₁ to +5 volts, and the integrated block I use NE555 to convert the +5 volt power supply voltage into a square wave pulse, which is output from the 3-pin of the integrated block I. When the 3-pin output of the integrated block I is "0", the +5 volt power supply voltage passes through the diode D ₁ to make the capacitor C ₃ is fully charged, the voltage on capacitor C ₃ is 5 volts, the left is negative and the right is positive; when the output of pin 3 of integrated block I is "+5 volts", the voltage at the left end of capacitor C ₃ rises from "0" to "+5 volts"", because the voltage at _both ends _of capacitor C3 cannot change abruptly, the voltage at the right end _of capacitor C3 rises from "+5 volts" to "+10 volts", and charges capacitor _C4 through diode D2, and the voltage at the left end of capacitor _C4 is " +5 volts", and the right end is "+10 volts", which realizes the double voltage output. The oscilloscope Q is used to demonstrate the 3-pin waveform of the integrated block I, and the voltmeter V ₂ shows the multiple relationship with the voltmeter V ₁ .

Due to the adoption of the above technical scheme, the utility model has the advantages and positive effects: it can demonstrate the voltage doubling function of the 555 integrated block, the structure is simple, intuitive and accurate, and the operation and demonstration are convenient.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a schematic circuit diagram of the utility model.

Fig. 2 is a schematic diagram of the overall structure of the utility model.

In the figure E. DC power supply S. Switch R ₁ . Adjustable resistor R ₂ . Resistor R ₃ . Resistor I. Manifold C ₁ . Capacitor C ₂ . Capacitor C ₃ . Capacitor C ₄ . _Capacitor D ₁ . Diode V _1. Voltmeter V _2. Voltmeter Q. Oscilloscope 1. Base 2. Demo Board

detailed description:

In Figure 1, the positive pole of the DC power supply E is connected to one end of the switch S, the other end of the switch S is connected to _one end of the adjustable resistor R1, and the other end of the adjustable resistor R1 is simultaneously connected to _one end _of the voltmeter V1 and the resistor _R2 One end of integrated block I, pin 8 of integrated block I, pin ₄ of integrated block _I , the positive pole of diode D1, the negative end of capacitor _C4 , the other end _of voltmeter V1 is connected to the negative pole of DC power supply E, the other end of resistor R2 Simultaneously connect pin 7 of manifold I, one end of resistor _R3 , and the other end of resistor _R3 connect pin 2 of manifold I, pin 6 of manifold I, _one end of capacitor C1, and the other end of capacitor C1 Pin 1 of the integrated block I and the negative pole of the DC power supply E, pin 5 of the integrated block I are connected to one end of the capacitor C2, pin ₃ of the integrated block I is connected to one end _of the oscilloscope Q, the negative end _of the capacitor C3, and the capacitor C3 _The positive terminal is connected to the negative pole _of diode D1 and the positive pole of diode _D2 at the same time, the negative pole of diode D2 is connected to the positive terminal of capacitor _C4 and one terminal of voltmeter _V2 at the same time, and the other terminal of voltmeter _V2 is connected to the other terminal of oscilloscope Q at the same time _One end, the other end of the capacitor C2, the negative pole of the DC power supply E. Manifold I uses NE555, resistor R ₂ is 3.3 kΩ, resistor R ₃ is 18 kΩ, capacitor C ₁ and capacitor C ₂ are both 0.01 microfarads, capacitors C ₃ and capacitor C ₄ are both 10 microfarads, adjustable Resistor R1 is used to change the reading _of voltmeter V1, oscilloscope Q is used to demonstrate the waveform of pin ₃ of integrated block _I , and voltmeter _V2 shows the multiple relationship with voltmeter V1.

In Figure 2, the DC power supply E, switch S, integrated block I, adjustable resistor R ₁ , voltmeter V ₁ , voltmeter V ₂ , and oscilloscope Q are fixed on the front of the demo board 2, and other components are fixed on the demo board 2 On the opposite side, connect it with a wire.

Demonstration method: turn on the switch S, adjust the adjustable resistor R ₁ so that the reading of the voltmeter V ₁ is 5 volts, at this time, the oscilloscope Q shows that the waveform of pin 3 of the integrated block I is a square with a frequency of 3.6 kHz and a peak value of +5 volts Wave pulse, the voltmeter V2 shows ₁₀ volts, that is, the multiple relationship between the _{voltmeter V2} and the voltmeter V1.

Claims (1)

1. A 555 Manifold Voltage Doubling Function Demonstrator, the circuit consists of DC power supply E, switch S, adjustable resistance R ₁ , resistance R ₂ , resistance R ₃ , Manifold I, capacitor C ₁ , capacitor C ₂ , capacitor C _3. Composed of capacitor C ₄ , diode D ₁ , diode D ₂ , voltmeter V ₁ , voltmeter V ₂ , and oscilloscope Q, the feature is: the anode of the DC power supply E is connected to one end of the switch S, and the other end of the switch S is connected to Adjust _one end of resistor R1, and connect the other end of adjustable resistor R1 to _one end of voltmeter V1, _one end of resistor R2, pin ₈ of integrated block I, pin 4 of integrated block _I , positive electrode of diode D1, The negative terminal of the capacitor _C4 , the other terminal _of the voltmeter V1 is connected to the negative terminal of the DC power supply E, the other terminal of the resistor R2 is connected to the pin ₇ of the integrated block I, one terminal of the resistor _R3 , and the other terminal of the resistor _R3 is connected to Pin 2 of manifold I, pin 6 of manifold I, one end of capacitor _C1 , the other end of capacitor C1 is connected to pin ₁ of manifold I and the negative pole of DC power supply E at the same time, pin 5 of manifold I is connected to capacitor C One end of ₂ , pin ₃ of integrated block I are connected to one end of oscilloscope Q and the negative end _of capacitor C3 at the same time, the positive end of capacitor C3 is connected to the negative pole _of diode _D1 and the positive pole of diode _D2 at the same time, and the negative pole of diode D2 is connected at the same time Connect the positive end of the capacitor _C4 , one end of the voltmeter V2, and the other end of the voltmeter V2 to the other end of the _oscilloscope Q, the other end of the capacitor _C2 , and the negative pole of the DC power supply E. _The integrated block I uses NE555.