Demonstrating instrument for automatic control circuit of common photoelectric device
A technology of automatic control circuits and photoelectric devices, applied in the direction of instruments, educational tools, teaching models, etc., can solve the problems that there is no demonstration instrument demonstration, students cannot intuitively understand the automatic control function, etc., and achieve strong intuitiveness and low cost Effect
Inactive Publication Date: 2011-10-19
NANJING COLLEGE OF CHEM TECH
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Problems solved by technology
[0002] At present, in the teaching of electronic circuits, when teaching common photoelectric devices such as photoresistors, phototransistors, photodiodes, photothyristors, and photocouplers can play an automatic control role in electronic circuits, there is no demonstration instrument demonstration, and students cannot intuitively understand Its automatic control function in electronic circuit
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[0010] in figure 1 Among them, pin 4 and pin 14 of the 556 integrated circuit (I) are connected to the positive pole of the DC power supply (E) through the power switch (K), pin 7 of the 556 integrated circuit (I) is connected to the negative pole of the DC power supply (E), and the 556 integrated circuit (I) pins 8 and 12 pass through the second capacitor (C 2 ) Is connected to the negative pole of the DC power supply (E), pin 13 of the 556 integrated circuit (I) passes through the fifth resistor (R 5 ) And the power switch (K) are connected to the positive pole of the DC power supply (E), the 13th pin of the 556 integrated circuit (I) passes through the sixth resistor (R 6 ) Connect pin 8 and pin 12 of 556 integrated circuit (I), connect the third resistor (R 3 ), the power switch (K) and the DC power supply (E) are connected in series, the switch (K 2 ) And the first resistance (R 1 ) In series, photo thyristor (G 2 ), photodiode (G 3 ), phototransistor (G 4 ), photoresistor (R...
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The invention relates to a demonstrating instrument for an automatic control circuit of a common photoelectric device, belonging to the technical field of electronic control demonstration. The demonstrating instrument is characterized in that: after parallel connection, one end of a photoelectric thyristor, one end of a photoelectric diode, one end of a photoelectric triode and one end of a photo resistor are connected with the anode of a direct-current power supply through a power supply switch, and the other ends of the photoelectric thyristor, the photoelectric diode, the photoelectric triode and the photo resistor are connected with the pin 2 and the pin 6 of a 556 integrated circuit through a change-over switch respectively; one end of the input end of a photoelectric coupler is connected with the anode of the direct-current power supply through the power supply switch, and the other end of the input end of the photoelectric coupler is connected with the cathode of the direct-current power supply through a switch and a first resistor; and one end of the output end of the photoelectric coupler is connected with the anode of the direct-current power supply through the power supply switch, and the other end of the output end of the photoelectric coupler is connected with the pin 2 and the pin 6 of the 556 integrated circuit through the change-over switch. Due to the adoption of the technical scheme, the demonstrating instrument has the advantages that: the automatic control functions of the photo resistor, the photoelectric triode, the photoelectric diode, the photoelectric thyristor and the photoelectric coupler in an electronic circuit can be demonstrated respectively according to the change of the reading of a voltmeter and the working states of a light-emitting diode and a loudspeaker, high intuition is achieved, and the manufacturing cost is low.
Description
Technical field [0001] The invention relates to a commonly used photoelectric device automatic control circuit demonstration instrument, belonging to the technical field of electronic control demonstration. Background technique [0002] At present, in the teaching of electronic circuits, students are taught that photoresistors, phototransistors, photodiodes, photothyristors and photocouplers and other commonly used optoelectronic devices can play an automatic control role in electronic circuits. There is no demonstration instrument demonstration, and students cannot understand intuitively Its automatic control function in electronic circuits. Summary of the invention [0003] The technical problem to be solved by the present invention is to provide a commonly used photoelectric device automatic control circuit demonstration instrument, which can demonstrate the photoresistor, phototransistor, photodiode, photothyristor and photoelectric through the change of the reading of the vol...
Claims
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IPC IPC(8): G09B23/18
Inventor 葛宇宏
Owner NANJING COLLEGE OF CHEM TECH