Circuit Design

Using Phyphox and ESP32 Bluetooth to Plot Power Supply Voltage vs. External Resistance

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Using Phyphox and ESP32 Bluetooth to Plot Power Supply Voltage vs. External Resistance

1 Introduction After conducting the experiment “Plotting the P-R Characteristic Curve of the Power Supply,” using the existing circuit and making a few modifications to the experimental source code, the microcontroller successfully performed the experiment “Plotting the Relationship Curve between Power Supply Output Voltage and External Resistance.” 2 Circuit Setup for the Experiment Connect a … Read more

Wheel-Leg Robot Design and Implementation

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Wheel-Leg Robot Design and Implementation

Overall Scheme Design Overall Structure Design The wheel-leg robot (LeTian-robot2) utilizes a linkage mechanism (see Figure 1), with the linkage controlled by servos. By controlling the servos on both sides, the overall tilt and lift of the body can be achieved. The feet are directly driven by a 4010 brushless motor without any reduction gear. … Read more

Step-by-Step Guide to IoT Smart Faucet Circuit and ESP32 Programming

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Step-by-Step Guide to IoT Smart Faucet Circuit and ESP32 Programming

1. Circuit Completion Plan In the previous chapter, we identified the circuit modules required for the smart faucet. Next, we will determine how these circuit modules connect to form a complete “system”. Since our system structure is simple and the components are relatively few, it can be roughly divided into three parts: • Power supply … Read more

Understanding MCU Pins XIN and XOUT

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Understanding MCU Pins XIN and XOUT

Before we begin: 1. This article will focus on Microchip’s products. I believe Microchip has the most articles on clocks among MCU companies. The terminology used by Microchip may differ from that of other companies, but the usage is the same and does not affect understanding. 2. The term “clock source” is used to distinguish … Read more

Overview of Microcontroller Minimal System Circuit and Its Functions

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Overview of Microcontroller Minimal System Circuit and Its Functions

First, let us briefly introduce the specific functions of each pin of the 51 microcontroller, and then we will focus on the concept of the microcontroller minimal system, its composition, and the practical uses of the circuit diagrams of its various parts. According to the pin identification method of integrated circuits, with the notch facing … Read more

Analysis of a Classic Microcontroller Power Supply Circuit

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Analysis of a Classic Microcontroller Power Supply Circuit

Today we analyze a classic microcontroller power supply circuit, the schematic diagram of the circuit is shown below: ▲ Simplified switch circuit Before powering the circuit, the switch “TEST” is open, and the microcontroller is not powered through VCC. At this point, the base of T1 is grounded through R9 (100k), putting it in the … Read more

Classic Microcontroller Power Supply Circuit Analysis

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Classic Microcontroller Power Supply Circuit Analysis

Click the blue text to follow us Today, we will analyze a classic microcontroller power supply circuit. The circuit schematic is shown in the figure below: ▲ Simplified switch circuit Before powering the circuit, the switch “TEST” is open, and the microcontroller is not powered through VCC. At this time, the base of T1 is … Read more

Common Peripheral Circuit Design References and Insights for Microcontrollers

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Common Peripheral Circuit Design References and Insights for Microcontrollers

Having worked in the embedded industry for seven or eight years, I would like to share some hardware circuit design schemes and insights for those who are new to embedded systems. 1. Key Circuit R1 Pull-up Resistor: It clamps the uncertain signal to a high level through a resistor, maintaining it in a non-triggered state … Read more

Master These 8 Key Points to Learn Microcontrollers Easily!

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Master These 8 Key Points to Learn Microcontrollers Easily!

With the development of the times, microcontrollers have become one of the essential learning topics for many electronic engineers. However, learning microcontrollers is not easy. If you master the following eight knowledge points or techniques, learning microcontrollers will be much more efficient! 1. Choosing Pull-Up ResistorsIn microcontroller circuits, the choice of pull-up resistors is very … Read more

10 Easy and Practical Microcontroller Circuits

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10 Easy and Practical Microcontroller Circuits

1. Choosing Pull-Up Resistors for Microcontrollers As can be seen in the reset circuit, when resistor R1=10k, RST is high, but when R1=50, RST is low. Clearly, R1=10k is incorrect, as the microcontroller remains in the reset state and cannot function. This occurs because the RST pin contains a transistor, which allows a small cutoff … Read more