Arduino Uno and Nano primarily function as control interfaces rather than image processors when working with AI camera modules. These boards have extremely limited resources (2KB RAM on Uno, 32KB flash memory) which makes it impossible to store even a single 320x240 pixel image, let alone process it. Instead, AI modules like HuskyLens, OpenMV, or ESP32-CAM contain dedicated processors (like STM32H7 in OpenMV or ESP32 in ESP32-CAM) that handle all the computationally intensive tasks internally. These modules run neural networks, perform image processing, and extract features, then send only the interpreted results to Arduino - such as "face ID:1 detected at position (150, 120)" or "red line detected at angle 45°". The Arduino then uses these simplified data packets to make decisions, like turning a servo to track the face or adjusting motor speed to follow a line.

I’ve seen WArnings about using the current (amp) setting on a multimeter, and I WAnt to be cautious. I understand that to measure current, the meter has to be placed in series with the load. But I’m unsure about the risks involved when doing this on a live circuit, especially with higher voltages like AC mains or even 12V DC systems with decent current. Is it safe to switch to the amp mode while the circuit is powered?

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.