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Tinker Thoughts Blog

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  • Using EEPROM on the Nano Flip to Make a Button Logger

    TTB #18: [Guest Post] Using EEPROM on the Nano Flip to Make a Button Logger

    The Nano Flip, built on the ATmega328P, includes 1 KB of EEPROM memory that retains data even after power loss. This tutorial demonstrates how to use EEPROM in a simple but practical button press logger. Each press increments a counter which is stored permanently in the EEPROM. The current counter value is displayed on an I2C LCD, making it easy to visualize the data. By leveraging EEPROM, your project can survive resets or power outages, continuing exactly where it left off. This same approach can be extended to countless applications and use cases.

    TTB #18: [Guest Post] Using EEPROM on the Nano Flip to Make a Button Logger

    The Nano Flip, built on the ATmega328P, includes 1 KB of EEPROM memory that retains data even after power loss. This tutorial demonstrates how to use EEPROM in a simple but practical button press logger. Each press increments a counter which is stored permanently in the EEPROM. The current counter value is displayed on an I2C LCD, making it easy to visualize the data. By leveraging EEPROM, your project can survive resets or power outages, continuing exactly where it left off. This same approach can be extended to countless applications and use cases.

  • Li-Po & Li-Ion Battery Charging Calculator with BQ24074

    TTB #17: Li-Po & Li-Ion Battery Charging Calculator with BQ24074

    This calculator helps with Li-Po and Li-Ion single cell batteries by providing key charging values based on the BQ24074. It calculates charging current, termination current, and a suggested battery capacity. The goal is to make datasheet information easier to apply in practical designs. By entering a few parameters, you can see the values needed to set up or check a charging circuit. This tool is intended for straightforward reference and reduces the need to work through the equations manually. It is suited for anyone working with single cell battery charging using the BQ24074 or similar ICs.

    TTB #17: Li-Po & Li-Ion Battery Charging Calculator with BQ24074

    This calculator helps with Li-Po and Li-Ion single cell batteries by providing key charging values based on the BQ24074. It calculates charging current, termination current, and a suggested battery capacity. The goal is to make datasheet information easier to apply in practical designs. By entering a few parameters, you can see the values needed to set up or check a charging circuit. This tool is intended for straightforward reference and reduces the need to work through the equations manually. It is suited for anyone working with single cell battery charging using the BQ24074 or similar ICs.

  • Measuring the Current Draw on BMP280 Sensor Module

    TTB #16: Measuring the Current Draw on BMP280 Sensor Module

    In this post, we measure the current draw of the BMP280/BME280 sensor modules in Normal Mode and Forced Mode using the Nordic PPK2 for precise readings. In Normal Mode, the sensor remains active, averaging 421.94µA continuously. In Forced Mode, the BMx280 enters deep sleep between readings, producing sharp bursts of ~627µA for only 12.38ms and averaging just 3.45µA at a 2-second interval — with deep sleep currents as low as 0.52µA. We used our custom BMx280 Arduino library, optimized for single-burst reads, to achieve these results. This design minimizes I²C/SPI bus time, supports both BMP280 and BME280, and offers simple...

    TTB #16: Measuring the Current Draw on BMP280 Sensor Module

    In this post, we measure the current draw of the BMP280/BME280 sensor modules in Normal Mode and Forced Mode using the Nordic PPK2 for precise readings. In Normal Mode, the sensor remains active, averaging 421.94µA continuously. In Forced Mode, the BMx280 enters deep sleep between readings, producing sharp bursts of ~627µA for only 12.38ms and averaging just 3.45µA at a 2-second interval — with deep sleep currents as low as 0.52µA. We used our custom BMx280 Arduino library, optimized for single-burst reads, to achieve these results. This design minimizes I²C/SPI bus time, supports both BMP280 and BME280, and offers simple...

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