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| # | Post Title | Result Info | Date | User | Forum |
| Why is LM317 still used over modern switching regulators? | 8 Relevance | 10 months ago | Suraj | Theoretical questions | |
| I’ve noticed that the LM317 linear voltage regulator is still widely used in various hobbyist and even some professional circuits, despite the availability of efficient and compact switching regulators. Considering that switching regulators offer better efficiency, less heat Dissipation, and smaller footprints, what are the reasons engineers or designers still opt for LM317 in certain designs? Is it due to simplicity, cost, noise sensitivity, or something else? | |||||
| Answer to: L293D/L298N heating issue – should I switch to MOSFET-based drivers? | 4 Relevance | 8 months ago | TechPulse | Theoretical questions | |
| Yes, much of the heating behaviour is inherent to older bipolar-driver ICs like the L293D and L298N. Those chips use bipolar transistors (Darlington or bipolar output stages) with large voltage drops, so a significant fraction of motor power is Dissipated in the chip as heat. Wiring and supply issues (thin wires, poor decoupling, undervoltage, high stall currents) can worsen the problem, but replacing the driver with a Modern MOSFET-based H-bridge or dedicated MOSFET motor driver typically reduces losses by orders of magnitude and greatly lowers heat. | |||||
| L293D/L298N heating issue – should I switch to MOSFET-based drivers? | 4 Relevance | 8 months ago | Roshan | Theoretical questions | |
| I’ve been using L293D and L298N motor drivers and noticed they heat up quickly, even under light loads.Is this inherent to these older ICs, or could it be a wiring/power supply issue on my side? How much of a Difference would Modern MOSFET-based drivers make in terms of efficiency and heat Dissipation? | |||||
| Difference between asynchronous and synchronous resets in flip-flops? | 5 Relevance | 10 months ago | J.Smith | Theoretical questions | |
| My teacher mentioned that there's an important Distinction between asynchronous and synchronous resets used in flip-flops, but I’m still a bit confused about how they actually Differ in behavior. From what I understand, both Types reset the flip-flop to a known state, but: How does the timing of an asynchronous reset Differ from a synchronous one? When designing Digital circuits or writing HDL (like Verilog or VHDL), how do I decide which Type to use? Are there any pros, cons, or common pitfalls I should be aware of with either reset Type? I'd appreciate a practical explanation or examples that clarify when and why one might be preferred over the other. | |||||
| Answer to: Difference between active and passive buzzer and how to identify them? | 5 Relevance | 2 years ago | Admin | Theoretical questions | |
| For a tank WAter level control system, both active and passive buzzers can be used for sound alerts, but which one is best depends on your needs. Key Differences:Active Buzzer: This Type comes with an internal oscillating circuit, meaning it generates sound as soon as you power it. You don't need any extra control or signal from a microcontroller—just apply voltage (like 5V), and it will produce a constant tone. This is ideal for simple "on/off" alerts. Pros: Easy to use, no extra coding needed to generate sound. Cons: Fixed tone—no control over pitch or ... | |||||
| Answer to: Why hasn't Arduino added a USB-C port to the UNO R3? | 5 Relevance | 2 years ago | Tech Geek | Hardware/Schematic | |
| ... Additionally, USB-C connectors and cables are generally more expensive than USB Type-B, especially in large quantities. This could increase the production costs of Arduino boards, potentially making them less affordable for hobbyists and students. When the Uno R3 WAs released, USB-C WAs either just emerging or not widely adopted, so using it wouldn't have been practical at the time. However, it's worth noting that the latest Arduino Uno R4 does include a USB-C port, showing that Arduino is gradually moving towards newer standards where it makes sense. | |||||
| Answer to: Differences Between LM358 Temperature Sensor and Thermistor? | 5 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. | |||||
| 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? | |||||
| 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: Best way to protect a motor driver from short circuits? | 4 Relevance | 9 months ago | Janet | Theoretical questions | |
| To protect a motor driver from short circuits, one of the most effective methods is to use a fast-blow fuse or a resettable polyfuse on the power supply line to the driver. This helps cut off the current quickly if a short occurs. Additionally, placing flyback Diodes across the motor terminals (if not already built into the driver) protects against voltage spikes caused by motor inductance. For more advanced protection, a current-sense resistor can be added to monitor current flow, and a microcontroller can Disable the driver if the current exceeds safe limits. Alternatively, using Modern motor driver ICs like the DRV8871 or BTS7960 is highly recommended, as they come with built-in protections such as overcurrent, thermal shutdown, and undervoltage lockout. Ensuring proper cooling and heat Dissipation also helps prevent damage from thermal stress that may result from sustained high current. | |||||
| Answer to: Do I really need anti-static precautions when handling ICs? | 4 Relevance | 10 months ago | Deboojit | Theoretical questions | |
| ... The damage might not be immediate or obvious; it often causes latent failures that show up later during operation. Certain Types of chips are more sensitive than others—CMOS devices, including many logic ICs and virtually all microcontrollers, are especially vulnerable due to their delicate internal structures. In contrast, older TTL logic chips (like the 74LS series) are somewhat more robust but still not immune. If the IC is already soldered onto a board, the risk is lower because the surrounding circuitry and ground planes can help Dissipate any static ... | |||||
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