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| # | Post Title | Result Info | Date | User | Forum |
| DIY an RF power meter Based on STM32F103 + MAX4003 | 10 Relevance | 1 month ago | anselbevier | Hardware/Schematic | |
| ... for beginners who are new to RF like me, and even the cheapest RF power meters cost hundreds of RMB. For electronics enthusiasts who follow the principle of "spend when you should, save when you can", DIYing an RF power meter is a great alternative. The first step WAs to define the functions and Design the hardware circuit. To test RF power, a chip called a detector is required. I had not found a suitable option for a long time as it WAs my first time working with an RF detector, until I saw the power detection module on the E25-C test baseboard, which use ... | |||||
| Why hasn't Arduino added a USB-C port to the UNO R3? | 4 Relevance | 2 years ago | Yvette | Hardware/Schematic | |
| Hello everyone, Arduino still uses USB Type-B instead of the latest USB-C, and to me, it doesn't seem like there's a particular reason for sticking with the older port. Why haven’t they changed it? Are there specific technical or Design considerations that have influenced this decision? | |||||
| RE: What is bandwidth in oscilloscope? | 3 Relevance | 9 months ago | Rashid | Equipments | |
| You're right—3x can be fine for clean sine WAves. The 5x rule is mainly for digital signals or sharp edges where higher harmonics matter more. Depends on the signal Type and what you're measuring. | |||||
| Can I use Analog pins as digital output pin? | 3 Relevance | 10 months ago | Rahav | Programming | |
| Is it possible to use analog pins as digital output? If yes, how to do this? I mean what command should I Type? | |||||
| Answer to: How do you design a PCB for high-frequency circuits? | 10 Relevance | 11 months ago | LogicLab | Theoretical questions | |
| You're absolutely right—when moving into high-frequency PCB Design (in the MHz to GHz range), layout becomes critical for ensuring signal integrity and performance. At these frequencies, traces behave like transmission lines, so maintaining controlled impedance is essential. For most RF applications, a 50-ohm microstrip or stripline trace is standard, and you’ll need to calculate trace width based on your PCB stack-up, dielectric material, and copper thickness. Trace layout should avoid right-angle bends, use 45° angles or curves, and keep high-speed traces as short and direct as possible. Differential signals (like USB or LVDS) require matched trace lengths and consistent spacing to maintain impedance and minimize skew. The PCB stack-up plays a huge role in high-frequency performance. It's best to place signal layers adjacent to solid ground planes to provide a continuous return path and minimize loop area, which helps reduce EMI. A 4-layer or higher board with dedicated power and ground planes is generally recommended. When choosing a stack-up, consult your PCB fabricator to ensure the dielectric thicknesses and materials support your impedance requirements. Common mistakes in high-speed PCB Design include failing to provide a solid ground reference under signal traces, using excessive or poorly placed vias that introduce unwanted inductance, and improperly terminating high-speed lines, which can result in reflections and ringing. Power integrity is also crucial—decoupling capacitors should be placed close to power pins, and using a mix of values helps cover a wider frequency range. Lastly, improper grounding between analog and digital sections can lead to noise coupling, so careful partitioning or single-point grounding is advised. With proper attention to these details and the use of simulation tools, Designing high-frequency PCBs becomes much more manageable and repeatable. | |||||
| How do you design a PCB for high-frequency circuits? | 7 Relevance | 11 months ago | Nitin arora | Theoretical questions | |
| I’ve mostly worked with low-frequency analog and digital circuits so far, but now I’m starting to explore high-frequency Designs (in the MHz to GHz range), and I’m realizing that PCB layout becomes much more critical at these frequencies. I’m looking for practical tips or best practices when Designing printed circuit boards (PCBs) for high-frequency circuits. 1. What factors should I consider for trace layout and impedance control? 2. How important is the PCB stack-up, and how do I decide on it? 3. What are the common mistakes to avoid in high-speed or RF PCB Designs? | |||||
| Answer to: Differences Between LM358 Temperature Sensor and Thermistor? | 6 Relevance | 2 years ago | Jignesh | Theoretical questions | |
| Thermistors cost much less than the LM35 temperature sensor but require calibration due to their non-linear nature. At the same time, a thermistor is more accurate and precise(down to +/- 0.1°C) than an LM35(around +/- 0.5°C). LM35: Very easy to integrate with Arduino. You can read the output voltage directly using an analog pin, and with simple conversion (multiply by 100 to convert from mV to °C), you get the temperature. Thermistors: While they can be integrated, they often require additional components (like a resistor for a voltage divider) and more complex calculations to convert resistance to temperature. This can make them slightly more challenging to set up. Main Differences Feature LM35 Temperature Sensor Thermistor Type Integrated circuit (analog voltage output) Resistor (typically NTC or PTC) Output Outputs a linear voltage (10 mV/°C) Resistance changes non-linearly with temperature Temperature Range Typically -55 to +150 °C Varies, but generally -40 to +125 °C Accuracy Typically ±0.5 °C or better Can be very accurate, but depends on the Type and calibration Response Time Fast response time Generally fast but varies by Design Ease of Use Simple to interface with Arduino (analog input) Requires more complex calculations for linearization Calibration Usually factory calibrated Often requires calibration and look-up tables for accuracy For most projects requiring precise temperature monitoring with reliable readings and ease of integration with Arduino, the LM35 is likely the best option. However, if you need the highest accuracy and can manage the additional complexity, consider using a thermistor P.S.: LM358 is an OP-AMP IC. LM35 is a temperature sensor. | |||||
| How can I build a basic RC car using Arduino? | 3 Relevance | 1 year ago | PCBChronicles | Arduino | |
| I WAnt to create a simple RC car using Arduino and need some guidance on the necessary components and setup. The plan is to control the car wirelessly but am unsure whether Bluetooth, RF, or Wi-Fi would be the best option. Additionally, I would like to know which Arduino board would be most suitable for this project and what Type of motor driver should be used to control the DC motors. If there are any recommended libraries, circuit diagrams, or example codes to help get started, I would appreciate any suggestions. | |||||
| Answer to: STM32 vs Arduino: Which One is Better? | 3 Relevance | 1 year ago | electronicb_brain | Hardware/Schematic | |
| I think it really depends on the Type of projects you're working on. If you're mainly doing simple LED displays, motor control, or basic IoT projects, Arduino boards are perfect. They’re simple and get the job done without much hassle. But if you WAnt to dive into audio processing, real-time data acquisition, or anything that requires heavy computation, STM32 is a beast. I switched over when I started working on a DIY oscilloscope project because I needed faster ADC and more memory. | |||||
| Difference between active and passive buzzer and how to identify them? | 3 Relevance | 2 years ago | Paul | Theoretical questions | |
| I'm working on a project based on a tank WAter level control system. I need to include a buzzer for sound alerts, but I know nothing about buzzers. I've come across active and passive buzzers, but I'm not sure which one would be the best choice for this project. Can anyone provide information on which would be more suitable, the key differences between active and passive buzzers, and how to identify each Type? | |||||
| Answer to: How is the job market for Electrical and Electronics Engineering graduates in the future? | 5 Relevance | 8 months ago | Sebastian | Theoretical questions | |
| Electrical and Electronics Engineering (EEE) continues to offer solid career opportunities, though the nature of jobs is shifting with technology trends. Traditional industries like power generation, electrical utilities, and manufacturing still employ many EEE graduates, but the biggest growth areas are now in renewable energy, electric vehicles, IoT, automation, and semiconductors. For example, governments and companies are investing heavily in semiconductor Design and electronics manufacturing, which is creating strong demand for engineers with VLSI, embedded systems, and hardware Design skills. Similarly, the EV sector is growing quickly, opening up roles in motor control, battery management, and power electronics. Renewable energy and smart grid projects also need skilled engineers for integration, control systems, and energy storage solutions. Arduino, IoT, and automation skills are increasingly valued, as industries move toward Industry 4.0 and smart manufacturing. Compared to IT/software jobs, core engineering salaries can sometimes start lower, but with specialization in areas like VLSI, embedded Design, or power systems, EEE graduates often find higher-paying roles and more stable long-term opportunities. | |||||
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