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Test an INA226 circuit with a controlled low-voltage load, verified shunt path, raw voltage readings, correct calibration units and configuration restored after restart.

Choose an SHT31 digital humidity module by interface suffix, supply and pull-up limits, address selection, environment, heater behaviour and data integrity.

Integrate a DS3502 with Arduino by verifying bias supplies, selecting volatile adjustment mode, checking wiper readback and saving startup values deliberately.

Build an LDR sensor Arduino voltage divider, read raw light-dependent values and use two adjustable thresholds to reduce built-in LED flicker.

Integrate an ADS1220 with Arduino using verified logic levels, SPI mode one, valid PGA settings and fresh signed conversions with explicit error handling.

Learn the LM358 pinout and distinguish classic and newer suffixes. Check input common-mode range, output headroom, feedback and loading before wiring.

Build an ADS1115 ESP32 voltage test with 3.3 V wiring, an Adafruit library example and checks for gain, I2C address, input limits and stable readings.

Bring up a MAX485 Arduino RS485 link using two documented nodes, fixed direction states and a simple UART test before adding half-duplex replies.

Choose a MAX6675 thermocouple module by probe type, temperature limits, supply and wiring, with Epro prices and checks before a first Arduino project.

Test an LM75 Arduino module using the NXP LM75B format, correct threshold encoding, hysteresis, fault queue and mode-specific output-clearing behaviour.