Multifunctional single-chip microcomputer learning board

Abstract

The utility model relates to a multifunctional one-chip microcomputer learning board, comprising a control chip U1, a power supply module, an AD conversion module, a motor module and an LED display module, the AD conversion module, the motor module and the LED display module are all connected with the control chip U1, and the power supply module is respectively connected with the control chip U1, the AD conversion module, the motor module and the LED display module. The single-chip microcomputer training device can be used for single-chip microcomputer learning, can also be used for practical operation training and examination of single-chip microcomputer modules of electricians and technicians, and is small in area, small in occupied space, convenient to carry and store, low in cost and high in cost performance.

Description

Technical Field

[0001] The utility model relates to the technical field of single-chip computers, in particular to a multifunctional single-chip computer learning board. Background Art

[0002] At present, the functions of conventional MCU learning boards on the market are only used for MCU learning and have single functions. In the practical assessment of senior electricians and technicians, there are assessments of MCU modules. The existing assessment equipment is large in size, with many and complex hardware circuits, low efficiency, many functional modules are abandoned, and it takes up a large training space, which is high in training costs. Summary of the invention

[0003] The utility model provides a multifunctional single-chip computer learning board, aiming to solve the problem that the existing single-chip computer learning board has single function and low use efficiency.

[0004] The utility model provides a multifunctional single-chip computer learning board, comprising a control chip U1, a power module, an AD conversion module, a motor module and an LED display module, wherein the AD conversion module, the motor module and the LED display module are all connected to the control chip U1, the power module is respectively connected to the control chip U1, the AD conversion module, the motor module and the LED display module, the AD conversion module comprises an A / D conversion chip U7, a 1 pin of an OR gate U6A is connected to a 16 pin of the control chip U1, a 2 pin of the OR gate U6A is connected to a 1 pin of an interface P9 Pins 3 of the OR gate U6A are connected to pin 11 of the inverting amplifier U4E, pin 10 of the inverting amplifier U4E is connected to pins 6 and 22 of the A / D conversion chip U7, pin 4 of the OR gate U6B is connected to pin 1 of the interface P9, pin 5 of the OR gate U6B is connected to pin 17 of the control chip U1, pin 6 of the OR gate U6B is connected to pin 13 of the inverting amplifier U4F, pin 12 of the inverting amplifier U4F is connected to pin 9 of the A / D conversion chip U7, and pin 7 of the A / D conversion chip U7 is connected to pin 2 of the interface P9.

[0005] As a further improvement of the utility model, the power module includes a USB port JP1, an interface P13 and an interface P1, the interface P1 outputs a -12V voltage, the interface P13 outputs a +12V voltage, pin 1 of the USB port JP1 outputs a 5V voltage, the cathode of the light-emitting diode D1 is grounded, the anode of the light-emitting diode D1 is connected to one end of the resistor R1, the other end of the resistor R1 is connected to pin 3 of the switch SW1, and pin 2 of the switch SW1 is connected to pin 1 of the USB port JP1.

[0006] As a further improvement of the present utility model, the AD conversion module also includes a D / A conversion chip U8 and an amplifier chip U9, pin 1 of the D / A conversion chip U8 is connected to pin 3 of the interface P9, pin 2 of the D / A conversion chip U8 is connected to pin 16 of the control chip U1, pin 1 of the amplifier chip U9 is connected to pin 9 of the D / A conversion chip U8, pin 2 of the amplifier chip U9 is connected to pin 11 of the D / A conversion chip U8, pin 3 of the amplifier chip U9 is connected to pin 12 of the D / A conversion chip U8 and grounded, pin 4 of the amplifier chip U9 is connected to pin 2 of the interface P10, pin 1 of the interface P10 is connected to a +12V voltage, pin 3 of the interface P10 is connected to a 5V voltage, pin 11 of the amplifier chip U9 is connected to pin 2 of the interface P11, pin 1 of the interface P11 is connected to a -12V voltage, and pin 3 of the interface P11 is grounded.

[0007] As a further improvement of the present invention, the motor module includes an interface P8, a motor JP2 And the motor chip U5, pin 1 of the motor chip U5 is connected to pin 2 of the inverting amplifier U4A, pin 2 of the inverting amplifier U4A is connected to pin 1 of the interface P8, pin 2 of the motor chip U5 is connected to pin 4 of the inverting amplifier U4B, pin 3 of the inverting amplifier U4B is connected to pin 2 of the interface P8, pin 3 of the motor chip U5 is connected to pin 6 of the inverting amplifier U4C, pin 5 of the inverting amplifier U4C is connected to pin 3 of the interface P8, pin 4 of the motor chip U5 is connected to pin 8 of the inverting amplifier U4D, pin 7 of the inverting amplifier U4D is connected to pin 4 of the interface P8, pin 1 of the motor JP2 is connected to pin 9 of the motor chip U5 and is connected to a 5V voltage, pin 2 of the motor JP2 is connected to pin 16 of the motor chip U5, pin 3 of the motor JP2 is connected to pin 15 of the motor chip U5, pin 4 of the motor JP2 is connected to pin 13 of the motor chip U5, and pin 5 of the motor JP2 is connected to pin 13 of the motor chip U5.

[0008] As a further improvement of the utility model, the LED display module includes an interface P4, a light-emitting diode D2, a light-emitting diode D3, a light-emitting diode D4, a light-emitting diode D5, a light-emitting diode D6, a light-emitting diode D7, a light-emitting diode D8 and a light-emitting diode D9, and the light-emitting diode D2, the light-emitting diode D3, the light-emitting diode D4, the light-emitting diode D5, the light-emitting diode D6, the light-emitting diode D7, the light-emitting diode D8 and the light-emitting diode D9 are respectively connected to pins 9, 8, 7, 6, 5, 4, 3 and 2 of the interface P4, and pin 1 of the interface P4 is connected to the photoresistor R12.

[0009] As a further improvement of the utility model, it also includes a reset button module, which is connected to the control chip U1. The reset button module includes an interface P5, a button SW3, a button SW4, a button SW5, a button SW6, a button SW7, a button SW8, a button SW9 and a button SW10. The buttons SW3, SW4, SW5, SW6, SW7, SW8, SW9 and SW10 are respectively connected to pins 1, 2, 3, 4, 5, 6, 7 and 8 of the interface P5.

[0010] As a further improvement of the utility model, it also includes a printer module, which is connected to the control chip U1. The printer module includes a printer interface P6 and an interface P12. Pin 1 of the printer interface P6 is connected to pin 1 of the interface P12, pin 11 of the printer interface P6 is connected to pin 2 of the interface P12, and pin 14 of the printer interface P6 is connected to a 5V voltage.

[0011] As a further improvement of the utility model, it also includes a digital tube module, which is connected to the control chip U1. The digital tube module includes a digital tube chip U2, a digital tube DS, an interface P7 and a drive chip U3. Pins 1 and 2 of the digital tube chip U2 are connected to pin 1 of the interface P7, pin 8 of the digital tube chip U2 is connected to pin 2 of the interface P7, pin 5 of the digital tube DS is connected to pin 3 of the digital tube chip U2, pin 9 of the digital tube DS is connected to pin 5 of the digital tube chip U2, and pin 1 of the digital tube DS is connected to pin 2 of the interface P7. Pin 6 of the digital tube chip U2 is connected, pin 2 of the digital tube DS is connected to pin 10 of the digital tube chip U2, pin 4 of the digital tube DS is connected to pin 11 of the digital tube chip U2, pin 6 of the digital tube DS is connected to pin 12 of the digital tube chip U2, pin 7 of the digital tube DS is connected to pin 13 of the digital tube chip U2, pin 3 of the digital tube DS is connected to the driver chip U3, and pins 1, 2, 3, 4, 5, 6, 7, and 8 of the driver chip U3 are respectively connected to pins 3, 4, 5, 6, 7, 8, 9, and 10 of interface P7.

[0012] As a further improvement of the present invention, it also includes a counting input module and a music module, which are connected to the control chip U1, and the counting input module includes a NAND gate U10A, a NAND gate U10B and a switch SW11, pin 3 of the NAND gate U10A and pin 5 of the NAND gate U10B are both connected to pin 2 of the interface P15, pin 2 of the NAND gate U10A is connected to pin 4 of the NAND gate U10B, pin 1 of the NAND gate U10A is connected to the switch SW11, and pin 6 of the NAND gate U10B is connected to the switch SW11; the music module includes a music chip U12 and a speaker, pin 3 of the music chip U12 is connected to the speaker, and pin 2 of the music chip U12 is connected to pin 3 of the interface P15.

[0013] As a further improvement of the utility model, it also includes a relay control module, which is connected to the control chip U1. The relay control module includes an inverting amplifier U11A, a coil LS2 and a diode D12. Pin 1 of the inverting amplifier U11A is connected to pin 1 of the interface P15, pin 1 of the inverting amplifier U11A is connected to pin 2 of the coil LS2, pin 1 of the coil LS2 is connected to the cathode of the diode D12, and the anode of the diode D12 is connected to pin 1 of the inverting amplifier U11A.

[0014] The beneficial effects of the utility model are: it can be used for single-chip microcomputer learning, and can also be used for practical training and assessment of single-chip microcomputer modules for senior electricians and technicians; it has a small area, occupies a small space, is easy to carry and store, has low cost, and is cost-effective. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a connection relationship diagram of each module of the utility model;

[0016] Figure 2 It is the control chip U1 and its auxiliary circuit of the utility model;

[0017] Figure 3 It is a circuit connection diagram of the power module of the utility model;

[0018] Figure 4 It is a circuit connection diagram of the AD conversion module of the utility model;

[0019] Figure 5 It is a circuit connection diagram of the motor module of the utility model;

[0020] Figure 6 This is a circuit connection diagram of the LED display module of the utility model;

[0021] Figure 7 This is a circuit connection diagram of the reset button module of the utility model;

[0022] Figure 8 This is the circuit connection diagram of the digital tube module of the utility model;

[0023] Fig. 9 It is the circuit connection diagram of the printer module of the utility model;

[0024] Fig.10 The utility model is a circuit connection diagram of a counting input module, a music module and a relay control module. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] like Figure 1-10 As shown, the utility model provides a multifunctional single-chip learning board, including a control chip U1, a power module, an AD conversion module, a motor module and an LED display module, wherein the AD conversion module, the motor module and the LED display module are all connected to the control chip U1, the power module is respectively connected to the control chip U1, the AD conversion module, the motor module and the LED display module, the AD conversion module includes an A / D conversion chip U7, a 1 pin of an OR gate U6A is connected to a 16 pin of the control chip U1, a 2 pin of the OR gate U6A is connected to a 1 pin of the OR gate U6A is connected to the 11 pin of the inverting amplifier U4E, the 10 pin of the inverting amplifier U4E is connected to the 6 and 22 pins of the A / D conversion chip U7, the 4 pin of the OR gate U6B is connected to the 1 pin of the interface P9, the 5 pin of the OR gate U6B is connected to the 17 pin of the control chip U1, the 6 pin of the OR gate U6B is connected to the 13 pin of the inverting amplifier U4F, the 12 pin of the inverting amplifier U4F is connected to the 9 pin of the A / D conversion chip U7, and the 7 pin of the A / D conversion chip U7 is connected to the 2 pin of the interface P9.

[0027] As an embodiment of the utility model, the power module includes a USB port JP1, an interface P13 and an interface P1, the interface P1 outputs a -12V voltage, the interface P13 outputs a +12V voltage, pin 1 of the USB port JP1 outputs a 5V voltage, the cathode of the light-emitting diode D1 is grounded, the anode of the light-emitting diode D1 is connected to one end of the resistor R1, the other end of the resistor R1 is connected to pin 3 of the switch SW1, and pin 2 of the switch SW1 is connected to pin 1 of the USB port JP1.

[0028] As another embodiment of the utility model, the AD conversion module also includes a D / A conversion chip U8 and an amplifier chip U9, pin 1 of the D / A conversion chip U8 is connected to pin 3 of the interface P9, pin 2 of the D / A conversion chip U8 is connected to pin 16 of the control chip U1, pin 1 of the amplifier chip U9 is connected to pin 9 of the D / A conversion chip U8, pin 2 of the amplifier chip U9 is connected to pin 11 of the D / A conversion chip U8, pin 3 of the amplifier chip U9 is connected to pin 12 of the D / A conversion chip U8 and grounded, pin 4 of the amplifier chip U9 is connected to pin 2 of the interface P10, pin 1 of the interface P10 is connected to a +12V voltage, pin 3 of the interface P10 is connected to a 5V voltage, pin 11 of the amplifier chip U9 is connected to pin 2 of the interface P11, pin 1 of the interface P11 is connected to a -12V voltage, and pin 3 of the interface P11 is grounded.

[0029] As another embodiment of the present utility model, the motor module includes an interface P8, a motor JP2 And the motor chip U5, pin 1 of the motor chip U5 is connected to pin 2 of the inverting amplifier U4A, pin 2 of the inverting amplifier U4A is connected to pin 1 of the interface P8, pin 2 of the motor chip U5 is connected to pin 4 of the inverting amplifier U4B, pin 3 of the inverting amplifier U4B is connected to pin 2 of the interface P8, pin 3 of the motor chip U5 is connected to pin 6 of the inverting amplifier U4C, pin 5 of the inverting amplifier U4C is connected to pin 3 of the interface P8, pin 4 of the motor chip U5 is connected to pin 8 of the inverting amplifier U4D, pin 7 of the inverting amplifier U4D is connected to pin 4 of the interface P8, pin 1 of the motor JP2 is connected to pin 9 of the motor chip U5 and is connected to a 5V voltage, pin 2 of the motor JP2 is connected to pin 16 of the motor chip U5, pin 3 of the motor JP2 is connected to pin 15 of the motor chip U5, pin 4 of the motor JP2 is connected to pin 13 of the motor chip U5, and pin 5 of the motor JP2 is connected to pin 13 of the motor chip U5.

[0030] As another embodiment of the utility model, the LED display module includes an interface P4, a light-emitting diode D2, a light-emitting diode D3, a light-emitting diode D4, a light-emitting diode D5, a light-emitting diode D6, a light-emitting diode D7, a light-emitting diode D8 and a light-emitting diode D9, and the light-emitting diode D2, the light-emitting diode D3, the light-emitting diode D4, the light-emitting diode D5, the light-emitting diode D6, the light-emitting diode D7, the light-emitting diode D8 and the light-emitting diode D9 are respectively connected to pins 9, 8, 7, 6, 5, 4, 3 and 2 of the interface P4, and pin 1 of the interface P4 is connected to the photoresistor R12.

[0031] As another embodiment of the utility model, it also includes a reset button module, which is connected to the control chip U1. The reset button module includes an interface P5, a button SW3, a button SW4, a button SW5, a button SW6, a button SW7, a button SW8, a button SW9 and a button SW10. The buttons SW3, SW4, SW5, SW6, SW7, SW8, SW9 and SW10 are respectively connected to pins 1, 2, 3, 4, 5, 6, 7 and 8 of the interface P5.

[0032] As another embodiment of the utility model, it also includes a printer module, which is connected to the control chip U1. The printer module includes a printer interface P6 and an interface P12. Pin 1 of the printer interface P6 is connected to pin 1 of the interface P12, pin 11 of the printer interface P6 is connected to pin 2 of the interface P12, and pin 14 of the printer interface P6 is connected to a 5V voltage.

[0033] As another embodiment of the utility model, it also includes a digital tube module, which is connected to the control chip U1. The digital tube module includes a digital tube chip U2, a digital tube DS, an interface P7 and a driver chip U3. Pins 1 and 2 of the digital tube chip U2 are connected to pin 1 of the interface P7, pin 8 of the digital tube chip U2 is connected to pin 2 of the interface P7, pin 5 of the digital tube DS is connected to pin 3 of the digital tube chip U2, pin 9 of the digital tube DS is connected to pin 5 of the digital tube chip U2, and pin 1 of the digital tube DS is connected to pin 2 of the interface P7. Pin 6 of the digital tube chip U2 is connected, pin 2 of the digital tube DS is connected to pin 10 of the digital tube chip U2, pin 4 of the digital tube DS is connected to pin 11 of the digital tube chip U2, pin 6 of the digital tube DS is connected to pin 12 of the digital tube chip U2, pin 7 of the digital tube DS is connected to pin 13 of the digital tube chip U2, pin 3 of the digital tube DS is connected to the driver chip U3, and pins 1, 2, 3, 4, 5, 6, 7, and 8 of the driver chip U3 are respectively connected to pins 3, 4, 5, 6, 7, 8, 9, and 10 of interface P7.

[0034] As another embodiment of the utility model, it also includes a counting input module and a music module, which are connected to the control chip U1, and the counting input module includes a NAND gate U10A, a NAND gate U10B and a switch SW11, pin 3 of the NAND gate U10A and pin 5 of the NAND gate U10B are both connected to pin 2 of the interface P15, pin 2 of the NAND gate U10A is connected to pin 4 of the NAND gate U10B, pin 1 of the NAND gate U10A is connected to the switch SW11, and pin 6 of the NAND gate U10B is connected to the switch SW11; the music module includes a music chip U12 and a speaker, pin 3 of the music chip U12 is connected to the speaker, and pin 2 of the music chip U12 is connected to pin 3 of the interface P15.

[0035] As another embodiment of the utility model, it also includes a relay control module, which is connected to the control chip U1. The relay control module includes an inverting amplifier U11A, a coil LS2 and a diode D12. Pin 1 of the inverting amplifier U11A is connected to pin 1 of the interface P15, pin 1 of the inverting amplifier U11A is connected to pin 2 of the coil LS2, pin 1 of the coil LS2 is connected to the cathode of the diode D12, and the anode of the diode D12 is connected to pin 1 of the inverting amplifier U11A.

[0036] The utility model provides a multifunctional single-chip microcomputer learning board, the purpose of which is to develop a multifunctional single-chip microcomputer learning board. The single-chip microcomputer learning board can be used for conventional single-chip microcomputer learning, and can also be used for practical training of electrician professional qualification (senior worker or technician) and practical assessment of electrician professional qualification (senior worker or technician). The single-chip microcomputer learning board contains both typical single-chip microcomputer learning circuits and circuits for practical assessment of single-chip microcomputer modules for senior electricians in Shenzhen and circuits for practical assessment of single-chip microcomputer modules for technicians in Shenzhen. It is powered by a USB interface and fixed by an acrylic plate shell.

[0037] The specific circuit of the single chip microcomputer circuit board is as follows:

[0038] The power module provides a DC5V working power supply to the single-chip circuit board through the USB interface, has a power switch and a power indicator light, and provides a DC positive and negative 12V power supply through the terminals on the circuit board for D / A conversion. A light-emitting diode D1 is also provided in the power module to indicate the working status.

[0039] The control chip U1 circuit has a reset circuit and an external crystal oscillator circuit to ensure the normal operation of the main control MCU. In the embodiment of the utility model, the control chip U1 adopts the model 80C51.

[0040] LED display circuit, 8-way LED display, easy to realize the cycle light function; photoresistor circuit, can monitor the brightness of light and realize related control functions, see the attached manual Figure 6 As can be seen in the figure, an adjustable resistor R13 is also provided in the circuit, which can control the resistance value of the photoresistor to adjust the brightness.

[0041] Digital tube display circuit, 8 digital tubes, digital tube chip U2 model uses 74LS164 driver, and uses driver chip U3ULN2803 for segment selection, which can realize digital tube static display function and digital tube dynamic display function.

[0042] Key input circuit. Eight reset keys can easily realize the input function of external signals.

[0043] The motor module adopts a stepper motor, and the motor chip U5 model adopts ULN2003. By integrating the drive of the Darlington tube ULN2003, the drive control of the stepper motor can be realized.

[0044] A / D conversion circuit. The A / D conversion function can be realized through the 8-channel 8-bit A / D conversion chip A / D conversion chip U7, and the A / D conversion chip U7 model adopts ADC0809.

[0045] D / A conversion circuit. The D / A conversion function can be realized through the 8-bit D / A conversion chip D / A conversion chip U8, and the D / A conversion chip U8 model adopts DAC0832.

[0046] Printer communication circuit. Standard printer interface circuit, can realize simple printing function.

[0047] Music circuit. It controls the operation of the music chip by outputting high and low levels.

[0048] Counting input circuit. Through two NAND gates and related circuits, the input signal of the mechanical key can be filtered to achieve the counting input function.

[0049] Relay control circuit. By outputting high and low levels, it controls whether the relay coil is energized, thereby controlling the on and off of the relay contacts.

[0050] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A multifunctional single-chip computer learning board, characterized in that: The invention comprises a control chip U1, a power module, an AD conversion module, a motor module and an LED display module. The AD conversion module, the motor module and the LED display module are all connected to the control chip U1. The power module is respectively connected to the control chip U1, the AD conversion module, the motor module and the LED display module. The AD conversion module comprises an A / D conversion chip U7. The 1st pin of the or gate U6A is connected to the 16th pin of the control chip U1. The 2nd pin of the or gate U6A is connected to the 1st pin of the interface P9. Pin 3 is connected to pin 11 of the inverting amplifier U4E, pin 10 of the inverting amplifier U4E is connected to pins 6 and 22 of the A / D conversion chip U7, pin 4 of the OR gate U6B is connected to pin 1 of the interface P9, pin 5 of the OR gate U6B is connected to pin 17 of the control chip U1, pin 6 of the OR gate U6B is connected to pin 13 of the inverting amplifier U4F, pin 12 of the inverting amplifier U4F is connected to pin 9 of the A / D conversion chip U7, and pin 7 of the A / D conversion chip U7 is connected to pin 2 of the interface P9.

2. A multifunctional single chip computer learning board according to claim 1, characterized in that: The power module includes a USB port JP1, an interface P13 and an interface P1, the interface P1 outputs a -12V voltage, the interface P13 outputs a +12V voltage, pin 1 of the USB port JP1 outputs a 5V voltage, the cathode of the light-emitting diode D1 is grounded, the anode of the light-emitting diode D1 is connected to one end of the resistor R1, the other end of the resistor R1 is connected to pin 3 of the switch SW1, and pin 2 of the switch SW1 is connected to pin 1 of the USB port JP1.

3. A multifunctional single chip computer learning board according to claim 2, characterized in that: The AD conversion module also includes a D / A conversion chip U8 and an amplifier chip U9. Pin 1 of the D / A conversion chip U8 is connected to pin 3 of the interface P9, pin 2 of the D / A conversion chip U8 is connected to pin 16 of the control chip U1, pin 1 of the amplifier chip U9 is connected to pin 9 of the D / A conversion chip U8, pin 2 of the amplifier chip U9 is connected to pin 11 of the D / A conversion chip U8, pin 3 of the amplifier chip U9 is connected to pin 12 of the D / A conversion chip U8 and grounded, pin 4 of the amplifier chip U9 is connected to pin 2 of the interface P10, pin 1 of the interface P10 is connected to a +12V voltage, pin 3 of the interface P10 is connected to a 5V voltage, pin 11 of the amplifier chip U9 is connected to pin 2 of the interface P11, pin 1 of the interface P11 is connected to a -12V voltage, and pin 3 of the interface P11 is grounded.

4. A multifunctional single chip computer learning board according to claim 2, characterized in that: The motor module includes an interface P8, a motor JP2 And the motor chip U5, pin 1 of the motor chip U5 is connected to pin 2 of the inverting amplifier U4A, pin 2 of the inverting amplifier U4A is connected to pin 1 of the interface P8, pin 2 of the motor chip U5 is connected to pin 4 of the inverting amplifier U4B, pin 3 of the inverting amplifier U4B is connected to pin 2 of the interface P8, pin 3 of the motor chip U5 is connected to pin 6 of the inverting amplifier U4C, pin 5 of the inverting amplifier U4C is connected to pin 3 of the interface P8, pin 4 of the motor chip U5 is connected to pin 8 of the inverting amplifier U4D, pin 7 of the inverting amplifier U4D is connected to pin 4 of the interface P8, pin 1 of the motor JP2 is connected to pin 9 of the motor chip U5 and is connected to a 5V voltage, pin 2 of the motor JP2 is connected to pin 16 of the motor chip U5, pin 3 of the motor JP2 is connected to pin 15 of the motor chip U5, pin 4 of the motor JP2 is connected to pin 13 of the motor chip U5, and pin 5 of the motor JP2 is connected to pin 13 of the motor chip U5.

5. A multifunctional single chip computer learning board according to claim 1, characterized in that: The LED display module includes an interface P4, a light-emitting diode D2, a light-emitting diode D3, a light-emitting diode D4, a light-emitting diode D5, a light-emitting diode D6, a light-emitting diode D7, a light-emitting diode D8 and a light-emitting diode D9. The light-emitting diode D2, the light-emitting diode D3, the light-emitting diode D4, the light-emitting diode D5, the light-emitting diode D6, the light-emitting diode D7, the light-emitting diode D8 and the light-emitting diode D9 are respectively connected to pins 9, 8, 7, 6, 5, 4, 3 and 2 of the interface P4, and pin 1 of the interface P4 is connected to the photoresistor R12.

6. A multifunctional single chip computer learning board according to claim 1, characterized in that: It also includes a reset button module, which is connected to the control chip U1. The reset button module includes an interface P5, a button SW3, a button SW4, a button SW5, a button SW6, a button SW7, a button SW8, a button SW9 and a button SW10. The buttons SW3, SW4, SW5, SW6, SW7, SW8, SW9 and SW10 are respectively connected to pins 1, 2, 3, 4, 5, 6, 7 and 8 of the interface P5.

7. A multifunctional single chip computer learning board according to claim 2, characterized in that: It also includes a printer module, which is connected to the control chip U1. The printer module includes a printer interface P6 and an interface P12. Pin 1 of the printer interface P6 is connected to pin 1 of the interface P12, pin 11 of the printer interface P6 is connected to pin 2 of the interface P12, and pin 14 of the printer interface P6 is connected to a 5V voltage.

8. A multifunctional single chip computer learning board according to claim 1, characterized in that: It also includes a digital tube module, which is connected to the control chip U1. The digital tube module includes a digital tube chip U2, a digital tube DS, an interface P7 and a driving chip U3. Pins 1 and 2 of the digital tube chip U2 are connected to pin 1 of the interface P7, pin 8 of the digital tube chip U2 is connected to pin 2 of the interface P7, pin 5 of the digital tube DS is connected to pin 3 of the digital tube chip U2, pin 9 of the digital tube DS is connected to pin 5 of the digital tube chip U2, and pin 1 of the digital tube DS is connected to pin 2 of the digital tube chip U2. The 6th pin of the digital tube DS is connected to the 10th pin of the digital tube chip U2, the 4th pin of the digital tube DS is connected to the 11th pin of the digital tube chip U2, the 6th pin of the digital tube DS is connected to the 12th pin of the digital tube chip U2, the 7th pin of the digital tube DS is connected to the 13th pin of the digital tube chip U2, the 3rd pin of the digital tube DS is connected to the driving chip U3, the 1, 2, 3, 4, 5, 6, 7, 8th pins of the driving chip U3 are respectively connected to the 3, 4, 5, 6, 7, 8, 9, 10 of the interface P7.

9. A multifunctional single chip computer learning board according to claim 1, characterized in that: It also includes a counting input module and a music module, which are connected to the control chip U1. The counting input module includes a NAND gate U10A, a NAND gate U10B and a switch SW11. Pin 3 of the NAND gate U10A and pin 5 of the NAND gate U10B are both connected to pin 2 of the interface P15, pin 2 of the NAND gate U10A is connected to pin 4 of the NAND gate U10B, pin 1 of the NAND gate U10A is connected to the switch SW11, and pin 6 of the NAND gate U10B is connected to the switch SW11; the music module includes a music chip U12 and a speaker, pin 3 of the music chip U12 is connected to the speaker, and pin 2 of the music chip U12 is connected to pin 3 of the interface P15.

10. A multifunctional single chip computer learning board according to claim 9, characterized in that: It also includes a relay control module, which is connected to the control chip U1. The relay control module includes an inverting amplifier U11A, a coil LS2 and a diode D12. Pin 1 of the inverting amplifier U11A is connected to pin 1 of the interface P15, pin 1 of the inverting amplifier U11A is connected to pin 2 of the coil LS2, pin 1 of the coil LS2 is connected to the cathode of the diode D12, and the anode of the diode D12 is connected to pin 1 of the inverting amplifier U11A.

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