Automatic control circuit demonstration instrument of common photoelectric device
A technology of automatic control circuits and photoelectric devices, applied to instruments, educational tools, teaching models, etc., can solve the problems that students cannot intuitively understand the function of automatic control, and there is no demonstration instrument demonstration, etc. high effect
Inactive Publication Date: 2010-08-18
YANCHENG TEACHERS UNIV
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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] exist figure 1 Among them, pin 4 and pin 8 of the 555 integrated circuit (I) are connected to the positive pole of the DC power supply, pin 1 of the 555 integrated circuit (I) is connected to the negative pole of the DC power supply, and pin 5 of the 555 integrated circuit (I) passes through the capacitor (C 2 ) is connected to the negative pole of the DC power supply, and the light-emitting diode (G 5 ), the 2 pins of the 555 integrated circuit (I) are connected to the 6 pins and passed through the capacitor (C 1 ) is connected to the negative pole of the DC power supply, the power switch (K) is connected in series with the power supply (E), and the switch (K 2 ) and resistance (R 1 ) in series, the photoresistor (R 4 ), Phototransistor (G 4 ), photodiode (G 3 ), Photothyristor (G 2 ) and optocoupler (G 1 ) after the parallel connection, one end is connected to the positive pole of the DC power supply, and the other end passes through the transfer switch (K 1 )...
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The invention relates to an automatic control circuit demonstration instrument of a common photoelectric device, belonging to the technical field of automatic control circuit demonstration. A circuit consists of a voltmeter, a change-over switch, a photoresistor, a phototriode, a photodiode, a photoelectric thyristor, a photoelectric coupler, a 555 integration circuit, a resistor, a capacitor and a light emitting diode. The automatic control circuit demonstration instrument of the common photoelectric device is characterized in that the photoresistor, the phototriode, the photodiode, the photoelectric thyristor and photoelectric coupler are connected in parallel to form a parallel-connection circuit, one end of the parallel-connection circuit is connected with the anode of a direct current power supply, and the other end is connected with the second pin and the sixth pin of the 555 integration circuit. Due to the adoption of the technical scheme, the invention has the advantages that the automatic control functions of the photoresistor, the phototriode, the photodiode, the photoelectric thyristo and the photoelectric coupler in the electronic circuit can be respectively demonstrated through the reading variation of the voltmeter and the working state of the light emitting diode, thereby having strong visual impression and low manufacture cost.
Description
technical field [0001] The invention relates to a commonly used photoelectric device automatic control circuit demonstration instrument, which belongs to the technical field of automatic control circuit demonstration. Background technique [0002] At present, in the teaching of electronic circuits, when teaching common optoelectronic 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 circuits. Contents of the invention [0003] The purpose of the present invention is to provide a common photoelectric device automatic control circuit demonstrator, which can respectively demonstrate the functions of photoresistors, phototransistors, photodiodes, photothyristors and photocouplers in electronic circuits through changes in voltmeter read...
Claims
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IPC IPC(8): G09B23/18
Inventor 周殿凤
Owner YANCHENG TEACHERS UNIV