Aim of this project is to present a way to store a large quantity of data into microSD card in files with FAT32 format. Here, ATmega32 is used for data collection and microSD interface. The data is received from in-build 8-channel ADC of ATmega32. One channel is used for reading temperature from LM35 sensor and remaining channels are used for simply reading voltages and storing them.
microSD ATmega32 Data-Logger - [Link]
Back in February, we wrote a post on Analogue to Digital Conversion. Many people mentioned that it was a bit light and they would like a more advanced tutorial. Well here it is…
In this tutorial we add a second analogue input and use the ADC Conversion Complete interrupt. The circuit we are using is similar to what we used last time but has an extra trimpot and uses an ATmega168A microcontroller. The ATmega168 is now obsolete, but its replacement (ATmega168A) is almost identical.
Analogue to Digital Conversion Interrupts on an ATmega168A – [Link]
Texas Instruments today introduced the industry’s first two-channel, simultaneous-sampling successive approximation (SAR) analog-to-digital converters (ADCs) with two independently controlled internal references for simplified system-level design. [via]
TI intros first 2-channel, simultaneous-sampling ADCs - [Link]
Many AVR microcontrollers are capable of doing Analogue to Digital Conversion. The ATmega168 has 6 ports (8 ports on the SMD packages) that can be used for analogue input. This tutorial shows you how.
Analogue to Digital Conversion on an ATmega168 - [Link]
rsdio presents: MAX11209/MAX11211, ultra-low-power, high-resolution, serial-output ADCs. [via]
- Pin-compatible versions of the 24-/20-/16-bit family
- Low 150µA supply current is ideal for portable sensors
- Includes four GPIOs that can be used for external mux control
- When used with the specified data rates, the internal digital filter provides more than 100dB rejection of 50Hz or 60Hz line noise
MAX11209/MAX11211 18-Bit, ultra-low power, delta-sigma ADCs – [Link]
This project shows how to measure the power supply of your micro-controller that can be very important and critical, specially for battery powered applications. The solution the author explains in this short tutorial don’t need any external components, for all the AVR micro controllers that have an internal ADC. As an example in this article, we are going to use an ATMEGA48 micro controller.
AVR: Monitor power supply voltage, for free! – [Link]
Analog to digital conversion are required in embedded systems because most of their surroundings comprise of analog signals and the embedded processors can process only digital data. This tutorial shows how to use the internal ADC module of a PIC microcontroller to read an external analog signal and convert it to a digital number. The conversion output will be displayed in a character LCD.
Tutorial on Analog to Digital conversion using PIC - [Link]
This project is a digital TouchClock that uses your own handwriting to display the time and days in a graphical LCD. You enter the numbers and day names on the configuration mode and the clock is using them to display the info. It uses a 128×64 BLUE/WHITE TOUCHSCREEN GLCD from CircuitED and the ADCs on a PIC18 microcontroller to translate the X and Y coordinates of touchscreen. [via]
TouchClock : Design your own GLCD Clock – [Link]