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Analog and digital laboratory equipment

The equipment is developed according to the latest syllabus of the State Education Commission, and this product is developed in accordance with the requirements of the syllabus of higher education and vocational education in China. It is the most advanced technology in the country, and all the experimental components have been installed on the component box. The component box is inserted into the universal nine-hole universal board during the experiment. There are multiple layouts of the same experiment, which can effectively improve the practical ability, so that students have a complete, practical, and close to the actual experimental process, learn and master the operations involved, strengthen students 'understanding of related theoretical knowledge, train and improve students' practical Hands-on ability; on this basis, through the design of relevant innovative experiments, students 'initial ability to discover, analyze, and solve problems is provided; in addition, it provides a support platform for teachers' scientific research. The transparent component box body is adopted, and the built-in components are clear at a glance. The box cover can be opened when the component is replaced, which is convenient for maintenance. ( Teaching Equipment | Teaching Instruments )

Features of this product:
The experimental bench has more complete safety protection measures and more complete functions. The center of the experimental table is equipped with a universal circuit board. The circuit board is injection molded. The surface is evenly distributed with nine holes to form a set of interconnected jacks. The component box is randomly inserted into the experimental circuit. The component box box is transparent and intuitive. Well, the box lid is printed with the symbol of the element that never fades, and the lines are clear and beautiful. The box body and the box cover adopt a more scientific press card structure, which can be disassembled and repaired right. The components are placed in the left and right cabinets under the experiment table, which greatly improves the management level and the degree of planning, which greatly reduces the teacher's experiment preparation work.
※ Scope of application:
It is applicable to the experiment of electrical engineering, electrical engineering principles, electronic technology and other courses in colleges and universities, technical secondary schools, technicians, and vocational schools. Can complete AC and DC oscillation, magnetic circuit, operational amplifier, rectifier circuit, AC and DC amplifier circuit, digital logic circuit and other circuit experiments. This equipment is an ideal product for upgrading or existing laboratory equipment. Its equipment is an important sign of school level and grade.

Detailed description of complete sets of analog and digital electronic circuit laboratory equipment
※ Experiment bench structure: (The structure of the experiment bench and operation table of electrical, analog, and digital laboratory equipment is the same.)
I. Composition and equipment of experimental equipment: (Twenty-four seats as an example)
(1) Teaching console: It consists of teaching experiment operation table, electricity experiment table and demonstration control screen, which can control the power of 12 student experiment tables respectively. The demonstration screen stands on the experimental platform for explanation and demonstration.
(II) Experimental operation part for students: There are 12 experimental operation tables, one table and two seats, and a universal circuit board (size: 35 × 90CM) is set in the center of the operation table, and the component box is randomly inserted into the experimental circuit according to the experimental circuit. The component box is transparent and intuitive. The internal components are clear at a glance. The box cover is printed with the component symbol that never fades. The lines are clear and beautiful. The color structure of the box cover and the box is easy to maintain, disassemble, replace. Each operating table is equipped with a rubber sheet to protect the desktop of the universal circuit board (such as placing a motor, soldering, etc. on the table). The experimental operation table is made of double-sided decorative panels. The structure is sturdy, beautiful, non-fading, and unchanged. There are drawers in the middle to store tools. There is a component storage cabinet on the left and right sides of the experimental table for placing experimental components and storage boards. . Specifications: 160 × 70 × 80cm.
(3) Electricity test benches: There are 13 sets in total, one set for each student's experimental operation table and teaching table.
(4) Equipment:
39 pointer type 1.5 DC ammeters, 13 MF500 multimeters, 13 digital multimeters, 13 180W three-phase motors, 26 time relays, 26 thermal relays, 78 AC contactors, 25 sets of electric iron and smelting iron frames , 13 sets of wire strippers, needle-nose pliers, screwdrivers and other tools, 13 sets of resistors, potentiometers, inductors, capacitors, transformers, strip magnets, integrated sockets and other component unit boxes (the components have been installed in the unit box) ), 91 integrated sockets, 39 current test sockets, etc., 25 stools.
(V) User-supplied or replacement: oscilloscope, power meter, sliding line rheostat.
Composition and performance of the test bench:
1. Power and parameters
1.1 Input power: Three-phase four-wire power, the indicator lights when input.
1.2 Power output: There are secondary protection functions of fuse and leakage protection switch.
Group A: Single and three-phase adjustable AC power supply, providing three-phase 0-430V continuously adjustable AC power, and 0-250V single-phase adjustable power supply (equipped with a 1.5KVA three-phase self-coupling voltage regulator) Device), equipped with three pointer AC voltmeters, indicating the output voltage of the regulator.
Group B: Low voltage AC voltage 3-24V is adjustable in seven steps, the maximum output current is 1.5A, and the flow meter indicates.
Group C: Low voltage DC stabilized power supply, voltage 5V, current 0.5A, indicated by ammeter.
Group D: Dual stable current regulated power supply, both output voltages are 0 ~ 0.3V, continuously adjusted by multi-turn potentiometer, the maximum output current is 1.5A, each power output has 0.5 level digital ammeter and voltmeter indication . Voltage stability <10-2, load stability <10-2, ripple voltage <5mV.
Group E: Single-phase AC mains output for users to prepare their own equipment.
2. Function signal generator:
2.1 Waveform: Sine wave, triangle wave, square wave, pulse wave, sawtooth wave, TTL square wave. .
2.2 Frequency range: From 0.1Hz to 2MHz, there are seven frequency steps.
2.3 Sine wave distortion: 10-30Hz <3% 30Hz-100KHz≤1%
2.4 Square wave response: leading edge / back edge≤100nS (open circuit)
2.5 Maximum output amplitude (open circuit): f <1MHz amplitude ≤20Vp-p 1M <f≤2MHz amplitude ≤16Vp-p
2.6 DC bias (open circuit): ± 10V
2.7 Output impedance Z: Z0 = 50Ω ± 5Ω
2.8 Duty cycle: The rising and falling edges of the pulse and sawtooth wave can be continuously changed, ranging from 10% to 90%.
2.9 Voltage Controlled Oscillation (VCF): When the applied DC voltage changes from 0 to ± 5V, the corresponding frequency change is greater than 100: 1.
2.10 Output attenuation: 20dB 40dB 60dB.
3. Frequency counter:
3.1 Frequency measurement range: 1Hz ~ 100MH.
3.2 Gate time: 0.01S, 0.1S, 1S, 10S.
3.3 Input impedance (AC coupling): The resistance component is about 500KΩ, and the parallel capacitance is about 100P.
4. Single pulse: A pair of positive and negative pulses can be output each time.
5. Audio power amplifier: The input audio voltage is not less than 10mV, the output power is not less than 1W, the volume is adjustable, there is a speaker, which is used to amplify the sound of the circuit, and can also be used for signal tracking.
6. Seven-segment decoder: Three sets of seven-segment decoders respond to the decoding display digital tube in time.
7. External test AC and DC dual-use ammeter: accuracy class 0.5, three and a half digital display, measurement range: 0 ~ 1000mA.
8. Externally used AC and DC voltmeters: accuracy class 0.5, three and a half digital display, measurement range: 0 ~ 99.9V.

模拟、数字电子电路实验室设备

3. Experimental items:
(2) Analog electronics:
1.The forward and reverse characteristics of the diode
2. Input and output characteristics of the transistor
3.Transistor common emitter single tube amplifier
4.Two-stage resistance-capacitance coupling amplifier circuit
5. The effect of homogenous feedback on amplifier performance
6, FET amplifier
7.Differential amplifier circuit
8.Operational amplifier index test
9. Basic applications of integrated operational amplifiers (various analog operational circuits)
10. Non-linear application of integrated operational amplifier (various waveform generators)
11.Transformer-coupled push-pull power amplifier
12.OTL power amplifier
13.Integrated power amplifier
14.Single-phase bridge rectifier circuit
15. Series-transistor DC regulated power supply (design experiment)
16.Integrated DC stabilized power supply
17.Single-junction transistor characteristics
18.Single-junction transistor trigger circuit
19.Simple test of thyristor
20.Thyristor controllable rectifier circuit
Using the above 20 experimental components can also complete the following experimental items:
1.Voltage negative feedback bias circuit
2.Voltage-divided current negative feedback bias
3. Use a diode to stabilize the operating point
4.Common base amplifier circuit
5.Common collector amplifier circuit
6.Common source basic amplifier circuit
7, MOSFET common drain circuit
8.Field effect transistor common gate circuit
9.Single tube RC amplifier circuit
10.Transformer coupling amplifier circuit
11.Class A power amplifier circuit
12.Series current negative feedback circuit
13.Series voltage negative feedback circuit
14. Parallel voltage negative feedback circuit
15. Parallel current negative feedback circuit
16.Common base common emitter amplifier circuit
17.Boot emitter output circuit
18.NPN-PNP direct coupling amplifier circuit
19. Eliminate self-excited oscillation with negative feedback
20.Transistor switching
21.Transformer feedback circuit
22.Capacitor three-point oscillation circuit
23.Inductive three-point oscillation circuit
24. Basic form of differential amplifier circuit
25.Long tail differential amplifier circuit
26. Dual power long tail differential amplifier circuit
27. The op amp is used as an exchange scale amplifier
28. Inverting input protection measures
29. In-phase input protection measures
30.Protection of wrong polarity of power supply
31.RC high-pass circuit
32. Use transistors to protect devices
33.Differential input arithmetic circuit
34.Fast integration circuit
35.Simulate a first-order differential equation circuit
36.Simulate second-order differential equation circuits
37.Basic logarithmic operation circuit
38.Practical Differential Circuit
39. Basic circuit of anti-log amplification
40.Simple zero-cross comparison circuit
41.Using a diode as the upper limit detection amplitude selection circuit
42, lower limit amplitude selection circuit
43.Low-pass filter circuit in RC passive network
44, non-inverting input first-order low-pass filter circuit
45.Inverting input first-order low-pass filter circuit
46, simple second-order RC filter circuit
47.Typical second-order RC active low-pass filter circuit
48.Typical second-order high-pass active filter circuit
49. Basic band-pass filter circuit
50.Typical band-pass filter circuit
51.Rectangular wave oscillation circuit
52.Rectangular wave generator with adjustable amplitude and frequency
53.Sawtooth wave generator with adjustable amplitude and frequency
54 、 Single-phase half-wave rectifier circuit
55.Single-phase full-wave rectifier circuit
56, capacitor filter circuit
57 、 Capacitive filter with resistive load
58 、 RC filter circuit
59.Basic LC filter circuit
60 、 Double voltage rectifier circuit
61 、 Triple voltage rectifier circuit
62.Basic voltage regulator circuit
63.Basic pass tube regulator circuit
64.Regulator circuit with amplification link
65.Single-phase half-wave thyristor rectifier
66.Electronic voltage regulating circuit
67, electronic hypnosis-fun experiment one
68. Electronic doorbell circuit-interesting experiment two
69.Electronic alarm circuit-interesting experiment three
(3) Digital electronics:
1.Parameter test of TTL integrated logic gate
2.Parameter test of CMOS logic gate
3.Application of TTL integrated electrode open circuit gate and tri-state output gate
4.AND, NOT, OR, and NOT gate experiments
5. Half adder circuit experiment
6.Full adder circuit experiment
7.RS trigger experiment
8.D trigger experiment
9, JK trigger experiment
10.T-Trigger Experiment
11, JK type flip-flops are converted into D flip-flops
12, D-type flip-flops into JK triggers
13.Counter experiment
14. MSI shift register and its application
15.Decoders and transformation methods
16. MSI data selector and logic design
17, differential monostable circuit
18.Ring multivibrator
19.Using gate circuits to form encoders, distributors, and selectors
20, one of the design of the combination circuit-code conversion
21. Design of Combined Circuit 2-Display Circuit
22.Design of synchronous sequential circuits
23.Design of computer sequential circuits
24.Integrated timer test and application
25.CMOS integrated A / D, D / A conversion circuit experiment
26.Diode NOT gate or NOR gate circuit
27. Triode NOT gate, NAND gate, or NOR gate circuit
28.Asynchronous decimal subtraction counter
29.Asynchronous decimal addition counter
30. Comprehensive ability training experiment-electronic stopwatch

Digital,
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