CN213518866U

CN213518866U - Light-operated LED lamp experiment circuit board

Info

Publication number: CN213518866U
Application number: CN202022823726.9U
Authority: CN
Inventors: 杨翠云; 王艳玲
Original assignee: Guilin Normal College
Current assignee: Guilin Normal College
Priority date: 2020-11-28
Filing date: 2020-11-28
Publication date: 2021-06-22
Anticipated expiration: 2030-11-28

Abstract

The utility model provides a light-operated LED lamp experimental circuit board contains components such as integrated operational amplifier, photo resistance, emitting diode, adjustable resistance on the circuit board, and fixed connection has been done to whole pin or the part pin of some wherein components, and whole pin or the part pin of other some components then only are connected to the probe. The integrated operational amplifier on the circuit board is used as a voltage comparator, and students can quickly and flexibly design various light-operated LED lamp circuits so as to deepen the understanding of the voltage comparator and improve the teaching effect.

Description

Light-operated LED lamp experiment circuit board

Technical Field

The utility model relates to a light-operated LED lamp experiment circuit board belongs to analog electron technical field.

Background

The voltage comparator is one of the main contents of the analog electronic technology course, and in order to deepen the understanding of students on the voltage comparator, experiments with the voltage comparator are also arranged in teaching. However, most of the traditional teaching is to develop a verification experiment aiming at the voltage comparator, which is difficult to attract the interest of students and has poor teaching effect.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the utility model provides a light-operated LED lamp experimental circuit board contains components such as integrated operational amplifier, photo resistance, emitting diode, adjustable resistance on the circuit board, and fixed connection has been done to whole pin or part pin of some wherein components, and whole pin or part pin of other components then only are connected to the probe. The integrated operational amplifier on the circuit board is used as a voltage comparator, and students can quickly and flexibly design various light-operated LED lamp circuits so as to deepen the understanding of the voltage comparator.

The utility model discloses the concrete technical scheme who takes does:

a light-operated LED lamp experiment circuit board comprises an operational amplifier U1, triodes Q1 and Q2, a light-emitting diode D1, resistors R1-R4 and an adjustable resistor RV1, wherein a positive power supply end of the operational amplifier U1 is connected with +5V, a negative power supply end is grounded, an output end is connected with one end of a resistor R3, a positive phase input end is connected with a probe 5, a reverse phase input end is connected with a probe 6, and the other end of the resistor R3 is connected with the probe 7; one end of the resistor R1 is connected with the probe 1, the other end is connected with one end of the resistor R2 and the probe 2, and the other end of the resistor R2 is connected with the probe 3; one fixed end of the adjustable resistor RV1 is connected with +5V, the other fixed end is grounded, and the movable end is connected with the probe 4; the emitter of the triode Q1 is connected with +5V, and the base and the collector are respectively connected with the probe 8 and the probe 9; the emitter of the triode Q2 is grounded, and the base and the collector are respectively connected with the probe 10 and the probe 11; one end of the resistor R4 is connected with the probe 12, the other end is connected with the anode of the light emitting diode D1, and the cathode of the light emitting diode D1 is connected with the probe 13; the probe 14 and the probe 15 are connected with +5V, and the probe 16 and the probe 17 are grounded; r2 is a photoresistor, and the operational amplifier U1 is LMV 358.

The utility model has the advantages that: the utility model provides a light-operated LED lamp experiment circuit board is applied to the experiment teaching of the voltage comparator content of simulation electron technology course. By using the experimental circuit board, students can rapidly and flexibly design various light-operated LED lamp circuits, the enthusiasm of the students participating in experimental teaching can be improved, the understanding of the voltage comparator is deepened, and the teaching effect is improved.

Drawings

Fig. 1 is a circuit diagram of the present invention;

fig. 2 is a light-controlled LED lamp experimental circuit 1;

fig. 3 is a light-controlled LED lamp experimental circuit 2.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1, the light-operated LED lamp experimental circuit board comprises an operational amplifier U1, triodes Q1 and Q2, a light-emitting diode D1, resistors R1 to R4, and an adjustable resistor RV1, wherein a positive power supply terminal of the operational amplifier U1 is connected to +5V, a negative power supply terminal is grounded, an output terminal is connected to one end of a resistor R3, a positive phase input terminal is connected to a probe 5, an inverse phase input terminal is connected to a probe 6, and the other end of the resistor R3 is connected to a probe 7; one end of the resistor R1 is connected with the probe 1, the other end is connected with one end of the resistor R2 and the probe 2, and the other end of the resistor R2 is connected with the probe 3; one fixed end of the adjustable resistor RV1 is connected with +5V, the other fixed end is grounded, and the movable end is connected with the probe 4; the emitter of the triode Q1 is connected with +5V, and the base and the collector are respectively connected with the probe 8 and the probe 9; the emitter of the triode Q2 is grounded, and the base and the collector are respectively connected with the probe 10 and the probe 11; one end of the resistor R4 is connected with the probe 12, the other end is connected with the anode of the light emitting diode D1, and the cathode of the light emitting diode D1 is connected with the probe 13; probe 14 and probe 15 are connected to +5V, and probe 16 and probe 17 are connected to ground.

R2 is a photo-resistor connected in series with a resistor R1 for detecting the change of ambient light brightness; the operational amplifier U1 adopts LMV358, LMV358 is an output rail-to-rail operational amplifier, and when +5V is supplied, the output high level is +5V, and the output low level is 0V.

By using the experimental circuit board shown in fig. 1, a plurality of light-operated LED lamp circuits can be designed rapidly and flexibly, and experimental verification is performed.

Probe 1 and probe 14, probe 2 and probe 5, probe 3 and probe 16, probe 4 and probe 6, probe 7 and probe 10, probe 11 and probe 13, and probe 12 and probe 15 are connected by, for example, a dupont wire, to form the light-controlled LED lamp circuit shown in fig. 2. In the daytime, the resistance of the photoresistor R2 is small, the voltage of the positive phase input end of the operational amplifier U1 is lower than that of the negative phase input end, the output end of the operational amplifier U1 sends out low level, the triode Q2 is cut off, and the light-emitting diode D1 is turned off; at night, the resistance value of the photoresistor R2 is increased, the voltage of the positive phase input end of the operational amplifier U1 is higher than that of the negative phase input end, the output end of the operational amplifier U1 sends out high level, the triode Q2 is conducted, and the light-emitting diode D1 is bright.

Or, the light-controlled LED lamp circuit shown in fig. 3 is formed by connecting

probes

1 and 14,

probes

2 and 6,

probes

3 and 16,

probes

4 and 5,

probes

7 and 8,

probes

9 and 12, and

probes

13 and 17 with dupont wires. In the daytime, the resistance of the photoresistor R2 is small, the voltage of the inverting input end of the operational amplifier U1 is lower than that of the non-inverting input end, the output end of the operational amplifier U1 sends out high level, the triode Q1 is cut off, and the light-emitting diode D1 is turned off; at night, the resistance value of the photoresistor R2 is increased, the voltage of the inverting input end of the operational amplifier U1 is higher than that of the non-inverting input end, the output end of the operational amplifier U1 sends out low level, the triode Q1 is conducted, and the light-emitting diode D1 is bright.

Or connecting the probe 1 and the probe 16, the probe 2 and the probe 5, the probe 3 and the probe 14, the probe 4 and the probe 6, the probe 7 and the probe 8, the probe 9 and the probe 12, and the probe 13 and the probe 17 by using a DuPont wire, so as to form another light-controlled LED lamp circuit. In the daytime, the resistance value of the photoresistor R2 is small, the voltage of the positive phase input end of the operational amplifier U1 is higher than that of the negative phase input end, the output end of the operational amplifier U1 sends out high level, the triode Q1 is cut off, and the light-emitting diode D1 is turned off; at night, the resistance value of the photosensitive resistor R2 is increased, the voltage of the positive-phase end of the operational amplifier U1 is lower than the voltage of the negative-phase end, the output end of the operational amplifier U1 sends out low level, the triode Q1 is conducted, and the light-emitting diode D1 is bright.

Or connecting probe 1 and probe 16, probe 2 and probe 6, probe 3 and probe 14, probe 4 and probe 5, probe 7 and probe 10, probe 11 and probe 13, and probe 12 and probe 15 by using a dupont wire, so as to form another light-controlled LED lamp circuit. In the daytime, the resistance of the photoresistor R2 is small, the voltage of the inverting input end of the operational amplifier U1 is higher than that of the non-inverting input end, the output end of the operational amplifier U1 sends out low level, the triode Q2 is cut off, and the light-emitting diode D1 is turned off; at night, the resistance value of the photosensitive resistor R2 is increased, the voltage of the inverting input end of the operational amplifier U1 is lower than that of the non-inverting input end, the output end of the operational amplifier U1 sends out high level, the triode Q2 is conducted, and the light-emitting diode D1 is bright.

Claims

1. The utility model provides a light-operated LED lamp experiment circuit board, characterized by: the circuit board comprises an operational amplifier U1, triodes Q1 and Q2, a light-emitting diode D1, resistors R1-R4 and an adjustable resistor RV1, wherein the positive power supply end of the operational amplifier U1 is connected with +5V, the negative power supply end is grounded, the output end is connected with one end of the resistor R3, the positive phase input end is connected with the probe 5, the reverse phase input end is connected with the probe 6, and the other end of the resistor R3 is connected with the probe 7; one end of the resistor R1 is connected with the probe 1, the other end is connected with one end of the resistor R2 and the probe 2, and the other end of the resistor R2 is connected with the probe 3; one fixed end of the adjustable resistor RV1 is connected with +5V, the other fixed end is grounded, and the movable end is connected with the probe 4; the emitter of the triode Q1 is connected with +5V, and the base and the collector are respectively connected with the probe 8 and the probe 9; the emitter of the triode Q2 is grounded, and the base and the collector are respectively connected with the probe 10 and the probe 11; one end of the resistor R4 is connected with the probe 12, the other end is connected with the anode of the light emitting diode D1, and the cathode of the light emitting diode D1 is connected with the probe 13; the probe 14 and the probe 15 are connected with +5V, and the probe 16 and the probe 17 are grounded; r2 is a photoresistor, and the operational amplifier U1 is LMV 358.