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| # | Post Title | Result Info | Date | User | Forum |
| RE: What is bandwidth in oscilloscope? | 3 Relevance | 7 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 | 9 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 | 12 months 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. | |||||
| How do I choose the right op-amp for audio applications? | 3 Relevance | 6 months ago | Roshan | Theoretical questions | |
| When it comes to audio circuits, I’ve seen many people emphasize the importance of choosing the right op-amp, since it can significantly affect noise, distortion, and overall sound quality. What factors should be considered when selecting an op-amp specifically for audio applications? For example, how important are parameters like slew rate, input noise, bandwidth, or THD+N (Total Harmonic Distortion + Noise)? Are there certain op-amp families that are generally preferred for high-quality audio, and how do they compare to using general-purpose op-amps? | |||||
| Answer to: What’s the practical limit on daisy-chaining shift registers? | 3 Relevance | 8 months ago | Rahav | Theoretical questions | |
| Daisy-chaining a large number of shift registers, such as the popular 74HC595, is technically possible, but there are practical limitations you need to consider. Each shift register introduces a propagation delay, and as the chain gets longer, these delays accumulate. When chaining around 100 shift registers, the Total propagation delay can become significant, requiring you to slow down the clock frequency considerably to ensure reliable data transfer. High-speed operation becomes nearly impossible at this scale without special measures. Signal integrity is another major concern. Longer chains increase the length of the data and clock lines, which can result in voltage drops, reflections, and noise issues. To maintain clean signals, you will likely need to use buffers or repeaters at certain points in the chain, along with careful PCB layout and proper decoupling. If your design truly requires controlling such a large number of outputs, consider whether a different approach might be more suitable. For example, I²C or SPI GPIO expanders with unique addressing can drastically reduce complexity. Alternatively, you could use multiple smaller chains driven by separate microcontroller pins. | |||||
| Answer to: Shift Register Cascading Issues | 3 Relevance | 8 months ago | Tech Geek | Theoretical questions | |
| This kind of issue is quite common when cascading multiple 74HC595 shift registers. First, make sure you're shifting out the correct number of bits—8 bits per chip—before pulsing the latch pin. Timing can also be a factor, so try adding a small delay (like delayMicroseconds(1)) after the latch pulse. Signal integrity often becomes a problem as more ICs are added, especially with long wires or breadboards—keep connections short, use 100nF decoupling capacitors near each chip, and consider adding 100Ω series resistors on data and clock lines. Also, check that all chips share a common ground and that your power supply can handle the Total current draw. Lastly, ensure your shiftOut() direction (MSBFIRST or LSBFIRST) matches your wiring. These steps usually solve most inconsistent behavior when chaining multiple 74HC595s. | |||||
| RE: new to electronics and needing some guidance with a circuit . 555 LED lights | 3 Relevance | 8 months ago | Admin | Circuits and Projects | |
| Hi! I checked the circuit on TinkerCad. There were some mistakes, like wrong capacitor connection and value. Here's the edited one: A couple of points worth mentioning here: 1. On running the simulation, TinkerCad shows too much current drawn from the IC and may damage it. 2. This is true if you are running it continuously. In this case, all LEDs are ON at the same time for a very small duration, so it somehow works. 3. Still, not a good idea in the long run. I will suggest: 1. Use a 220-ohm resistor instead of 100. And connect two LEDs per pin to only one resistor. Meaning a Total of 8 resistors for an 8-pin. This will reduce the overall current draw from the IC and per pin as well. 2. Better use 330 ohm..but not that it will reduce the brightness of the LEDs further. | |||||
| Need help with Power Supply for 12V 4watt Motor | 3 Relevance | 1 year ago | getta | Circuits and Projects | |
| Hi there, I am a Total noob with electronics so figured I'd ask here for some help. I just bought a synchronous motor and need to power it. The motor is 12 volt AC 4 WAtt 50Hz. Can someone point me to what outlet and inverter (if necessary) is needed to power this motor, whether it be an outlet or battery powered? Here is a link to the motor I am using. Thank you for any help you can provide! | |||||
| Difference between active and passive buzzer and how to identify them? | 3 Relevance | 1 year 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? | |||||
| Why hasn't Arduino added a USB-C port to the UNO R3? | 3 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? | |||||
| Answer to: What exactly is PWM resolution ? | 3 Relevance | 1 year ago | catElectronics | Hardware/Schematic | |
| To put this PWM resolution concept into a practical context: If you’re dimming an LED with an Arduino UNO’s 8-bit PWM, you might see noticeable brightness steps when changing the duty cycle. This is because each step is about 0.4% of the Total brightness. With the ESP32’s 16-bit PWM, each step is only 0.0015%, so the LED brightness change is much smoother and almost imperceptible. This is crucial if you’re working on projects that require precise control, like mood lighting or audio signal modulation. But keep in mind, that the lower frequency at higher resolutions might introduce visible flicker in LEDs, so you’ll need to find a balance between resolution and frequency depending on your application. | |||||
| Answer to: What is EEPROM in Arduino and how to use it? | 3 Relevance | 1 year ago | Sebastian | Hardware/Schematic | |
| EEPROM (Electrically Erasable Programmable Read-Only Memory) allows you to store data even after the board is powered off. It's non-volatile. This makes it useful for storing things like settings, calibration values, or any data you WAnt to retain. Let's understand the different memory Types in Arduino: SRAM: Works as temporary storage while the program is running. Data in SRAM is lost when the power is turned off. Flash Memory: The Arduino stores your program code here. Like EEPROM, flash memory is non-volatile, but you can't store or retrieve any data d ... | |||||
| Answer to: How Does an Ultrasonic Sensor Like HC-SR04 Measure Distance? | 3 Relevance | 2 years ago | Alfred Alonso | Theoretical questions | |
| ... ultrasonic WAves propagate through the air until they hit an object, and when the WAves encounter an object, they reflect back towards the sensor. Immediately after the sensor transmit the signal, the Echo pin goes high. This signifies the start of the sensor's listening period. The sensor now awaits the return of the reflected ultrasonic WAve. If an object is within range, the receiving signal will be detected, causing the Echo pin to transition from high to low. The duration the Echo pin remains high corresponds to the Total time taken for the ultrasoni ... | |||||
