1. Introduction This morning, I conducted experimental tests on the output linear errors of different channels in the circuit DAC network. A friend commented on the video, suggesting an analysis of the internal resistance of the microcontroller on the output linear error. Below, I hope to obtain the impact of the microcontroller’s internal resistance on … Read more
The editorial department of Automotive Engineering will recommend three papers in the 8th issue of 2020 to readers, aiming to stimulate industry attention and discussion on these papers and related technologies. Research Background The State of Charge (SOC) represents the remaining battery capacity, and estimating the battery SOC is a crucial part of the Battery … Read more
Recently, we studied the relationship between the current in various parts of a voltage divider circuit and the movement of the sliding contact, drawing the relationship graph with the help of Geogebra. Now, we use Phyphox for experimental exploration to see if the theory matches the practice. Maker Jiaozuo Early Research Using Geogebra to explore … Read more
1 Introduction After conducting the “Plotting the Power Supply Volt-Ampere Characteristic Curve” experiment, the microcontroller successfully replicated Teacher Mei’s experiment on “Plotting the Relationship Curve Between Power Output and External Resistance” using the existing circuit with only minor modifications to the source code. 2 Circuit Experiment Setup Connect a 10-ohm fixed resistor in series with … Read more
1 Introduction Recently, during the joint examination, there was a question about measuring the electromotive force (EMF) and internal resistance of a power source using the voltage-resistance method. Considering the authenticity of this experimental background, we validated the experiment using ESP32 and Phyphox. 2 Question Review and Reference Analysis 3 Experimental Validation In this validation … Read more
Recently, while studying the relationship between the resistance of a thermistor and temperature using Phyphox and ESP32 Bluetooth, the author needed to plot the relationship between the thermistor resistance and time. By pinching or releasing the thermistor, they observed changes in the resistance-time graph, thus understanding the effect of temperature on the thermistor. The thermistor … Read more
Recently, inspired by a high school physics exam experiment question, I decided to use the voltage-resistance method to measure the electromotive force (EMF) and internal resistance of a dry battery. A few days ago, I used the ESP32 and Phyphox to measure the EMF and internal resistance of a simulated power supply using the voltage-resistance … Read more