Tag Archives: Logger

Netduino Day 5 – Writing to an SD Card

Expandable memory is always a plus no matter whether it’s a Phone, Camera or a Microcontroller. Even advantageous if we know how to use it. In this fifth day Netduino tutorial, we will learn a few writing operations about an SD card. We will learn how to write to a text file, shown as an example of writing a log. The Logger class is also capable of creating a text file at any given location then writing some text information to it.

SD Card in Netduino Plus

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Simplest Temperature Data Logger based on PIC12F683

This one chip data logger uses PIC12F683 microcontroller to read temperature from a DS1820 sensor and store it inside its internal EEPROM memory. The process is repeated in every 1 sec, 1 min, or 10 min interval as selected by user. The stored values can be transferred to a host PC through serial port. The serial communication uses a transistor based TTL to RS232 Level converter circuit to transfer data to PC.

This logger can store up to 254 temperature measurements in its internal EEPROM. Each data is 8-bit and the temperature resolution is 1 degree C. With three tact switch inputs, the user can control Start, Stop, Send, Reset, and Sampling time set operations. The hardware and firmware is available for free.

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