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solenoid valve on PCB
Hi, I'm preparing a two layer board which has an ATmega8, some sensors (including two analog pressure sensors), an XBee module, and a ULN2003 (with its own L78S05) for controlling...
Thursday, 27 September 2012 - 16:13
LUFA programming problem
Hi, I'm experimenting with LUFA on the Adafruit ATmega32U4 breakout board, and my system runs Fedora 14. I took the VirtualSerial demo and disabled anything to do with the...
Friday, 15 April 2011 - 16:31
atmega32u4 and LUFA
Hi, I bought the atmega32u4 breakout board from Adafruit and I'm trying to flash it with a simple blinking led program. I'm using this makefile with a few modifications: MCU=...
Sunday, 13 March 2011 - 19:34
ADC problem
Hello, I'm having a somewhat urgent ATmega ADC problem. I'm measuring both temperature (on PC4) and pressure (on PC5), but somehow the values are switched (when I try to measure...
Saturday, 19 February 2011 - 16:34
battery testing
Hi, I'm designing a simple pressure measuring tool, which has an atmega8, an analogue sensor, and a standard 2x16 LCD. It is powered by a 9V battery and a 7805 voltage regulator....
Wednesday, 15 December 2010 - 15:25
calculation problem
Hi, I'm trying to get this calculation right: Below is my code. The types of variables C1-D2 are based on the types found in the 8051 code provided by the sensor manufacturer (...
Tuesday, 21 September 2010 - 02:33
problem interfacing I2C sensor
Hi everyone, I'm trying to interface a atmega328 and a I2C pressure sensor. The datasheet can be found here and example code here. I connected the MCLK pin to PC2 and I'm using...
Thursday, 16 September 2010 - 21:15
compilation problem
This is a problem that I encountered a long time ago, and was solved by using long and cryptic compilation commands. I would like to solve it properly now. I'm trying to send a...
Saturday, 4 September 2010 - 00:21
24LC256 read problem
Hi, I'm trying to write one byte to a 24LC256 and read it back following this guide. The problem is that I always read 0xFF instead of the expected 0x55. This is what the output...
Wednesday, 25 August 2010 - 23:46
kicad to gerber questions
Hi all, I designed a small breakout board in Kicad and would like to subit it to MakePCB for production. I created the following gerber files and inspected them in Gerbv: edges,...
Saturday, 14 August 2010 - 12:01
UART in assembler problem
Hi, As a first attempt at AVR assembler I'm trying to send a character over UART, but nothing happens. This is what I came up with after some reading on the web: .include "m8def...
Friday, 6 August 2010 - 00:46
atmega8 memory problem
Hi, I'm somehow not able to run any example code for writing to the serial port or to an lcd screen, except when I rewrite the code to use PROGMEM. For example: void usart_puts...
Saturday, 8 August 2009 - 16:11