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[Introduction to Simulation] Demonstration Case

Overview

In order to familiarize developers who are new to simulation software or who have used other simulation software before with the simulation functions of EasyEDA, four cases are provided below.

1 LED lighting experiment

Simulate a 5V DC voltage source V1 in the Easy EDA simulation canvas, and place four groups of LED lighting paths composed of a resistor and an LED lamp. The four resistors are set to 100Ω, 1000Ω, 100kΩ and 1Meg (mega) respectively. Ω, after running the simulation, it is found that the red and yellow lights are on, but the green and blue lights are not on. This is because the previous resistor voltage divider setting is too large, and the voltage across the diode is too small, which cannot reach the conduction voltage of the diode. So it won't shine.

2 Multi-channel power supply simulation circuit

Use Easy EDA simulation mode to draw the following circuit. Use a 12V DC voltage source for power supply, divided into two outputs, one of which is adjustable through LM317. The calculation formula is: Vout=1.25x (1+R8/R7). Different voltages are output by adjusting the resistance of the R8 potentiometer. value; the other channel is stepped down to 5V through LM7805 and then outputs 3.3V voltage through LM1117-3.3V.

3 transistor common emitter circuit

Draw the following triode common-emitter circuit in the Easy EDA simulation mode. Use a signal generator to output a 1KHz sine wave signal with an amplitude of 100mV. The DC component is filtered through the capacitor and then amplified by the triode. The amplified output signal is viewed with an oscilloscope.

4 Three-person voting circuit

Lichuang EDA can also perform simulation analysis of digital circuits and draw the following circuit in simulation mode. Set up three switches to simulate the voting situation of three people. When indicating approval, the switch is closed and grounded, and the judgment is made through the 74HC128 decoder and 74HC20 NAND gate circuit. When any two or three switches are pressed, the green light lights up and the buzzer sounds (simulated by an LED); when only one switch is pressed or no switch is pressed, it indicates failure, the red light lights up, and the buzzer sounds. The buzzer doesn't sound.

Video explanation link: https://www.bilibili.com/video/BV1jo4y1X7tF

Design Files

All reference designs on this site are sourced from major semiconductor manufacturers or collected online for learning and research. The copyright belongs to the semiconductor manufacturer or the original author. If you believe that the reference design of this site infringes upon your relevant rights and interests, please send us a rights notice. As a neutral platform service provider, we will take measures to delete the relevant content in accordance with relevant laws after receiving the relevant notice from the rights holder. Please send relevant notifications to email: bbs_service@eeworld.com.cn.

It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

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Update:2025-06-19 04:55:13

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