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| # | Post Title | Result Info | Date | User | Forum |
| Answer to: Running Arduino Directly from a Solar Panel | 18 Relevance | 7 months ago | Mehjabeen | Arduino | |
| Yes, it’s possible to power an Arduino directly from a solar Panel, but not reliably without extra components. A solar Panel’s voltage and current fluctuate with sunlight, which can cause the Arduino to reset or even get damaged. To make it work safely, you’ll need at least a regulator (buck or buck-boost) to keep the voltage stable, a blocking diode to prevent reverse current at night, and some capacitors or a supercapacitor to smooth out short drops in power. Without a battery, the project may still cut off under clouds or low light, so if continuous operation is required, even a small buffer battery or supercap is highly recommended. | |||||
| Running Arduino Directly from a Solar Panel | 12 Relevance | 7 months ago | SparkLab | Arduino | |
| Is it possible to power an Arduino project directly from a solar Panel without using a battery? I’m concerned about voltage fluctuations and whether the Arduino can handle them, or if additional components are required to make it work safely. | |||||
| Answer to: Raspberry Pi Pico vs ESP32? | 8 Relevance | 9 months ago | MatthewLopez | RPi Pico | |
| Thank you so much for sharing the Info. | |||||
| Answer to: Is a capacitor really linear? | 6 Relevance | 9 months ago | Admin | Theoretical questions | |
| A capacitor is called linear because the relationship between the voltage across it and the current flowing through it is linear. The exponential curve you're seeing is its behavior over time, which is different. Here’s the breakdown: What "Linear" actually means here In circuit theory, a component is linear if it follows the rule of superposition and scaling.1 In simple terms: if you double the cause, you double the effect. For a capacitor, the relationship is defined by the equation 2I=CdtdV.3 This means the current (4I) is directly proportional to the rate of change of voltage (5dV/dt).6 So, if you double the current going into the cap, its voltage changes twice as fast. If you halve the current, its voltage changes half as fast. That direct, proportional relationship is what makes it a linear component. So why the exponential curve? That famous exponential curve shows the capacitor's voltage versus time when it's part of a circuit with a resistor (an RC circuit). It's not a direct graph of voltage vs. current. Think about what happens when you charge it: At the start, the capacitor is empty, so a large current flows in. As it charges, voltage builds up across it. This built-up voltage opposes the source, which reduces the voltage across the resistor, and therefore reduces the current flowing into the cap. So, the charging slows down as it gets fuller. This process of "charging slower and slower as it fills up" is what creates that exponential curve. The capacitor itself is still behaving linearly at any given instant, but the behavior of the whole circuit over time is exponential. So: Component's V-I relationship: Linear. (The physics of the cap itself). Circuit's V-T response: Exponential. (The behavior you see over time in an RC circuit). Hope that clears it up! | |||||
