avrm8ledtest-0.6.tar.gz, 25095 bytes, example program to test the GCC AVR programming environment. An a LED connected to PC5 will start to blink after loading of the software.
avrlcdtest-1.0.tar.gz, 15634 bytes, example program for using the tuxgraphics LCD displays with an atmega8 microcontroller. A schematic drawing of the test circuit is included in the tar.gz file.

Guides:

Resistor Color Code Guide, resistor color codes explained, capacitor value codes

Note that there is a huge amount of software and examples which are downloadable at the end of each project/article at http://tuxgraphics.org/electronics/

Datasheets

tuxgr_yellowgreen_transflective_backlight_16x2.pdf, 160377 bytes, datasheet for the yellow-green transflective LCD display, 16x2 characters, with backlight
tuxgr_blue16x2.pdf, 121850 bytes, datasheet for the blue tuxgraphics LCD display with 16x2 characters and ISO 8859-1 character encoding (older version, sold until May 2012)
tuxgr_20x2.pdf, 38996 bytes, datasheet for tuxgraphics LCD display with 20x2 characters
tuxgr_16x2_r2.pdf, 96473 bytes, datasheet for tuxgraphics LCD display with 16x2 characters (older version, sold until June 2011)
tuxgr_16x2.pdf, 27217 bytes, datasheet for tuxgraphics LCD display with 16x2 characters (older display version, sold until Nov. 2006)
Epcos-ntc-B57891M472J.pdf, 433722 bytes, datasheet of the NTC which is included in the kit for article 365/369 (A digital thermometer or talk I2C to your atmel microcontroller), variant: blue grey disk
ntc-article365.pdf, 719872 bytes, datasheet of the NTC which is included in the kit for article 365/369 (A digital thermometer or talk I2C to your atmel microcontroller), variant: color coded drop shape
enc28j60.pdf, 1715036 bytes, version 2004, datasheet of the enc28j60 ethernet controller with SPI interface, from microchip
enc28j60-version2006.pdf, 1497137 bytes, version 2006, datasheet of the enc28j60 ethernet controller with SPI interface, from microchip
enc28j60-B4_errata.pdf, 188088 bytes, hardware errata list from microchip for Rev B4 of the enc28j60. Note: this list looks quite long but it is not really relevant if you follow the design described in the tuxgraphics articles (http://tuxgraphics.org/electronics/)
enc28j60-B7_errata.pdf, 109132 bytes, hardware errata list from microchip for Rev B7 of the enc28j60. Note: this list looks quite long but it is not really relevant if you follow the design described in the tuxgraphics articles (http://tuxgraphics.org/electronics/)
atmega8-complete-revQ.pdf, 2846392 bytes, Datasheet for the atmega8 μC
atmega48_88_168_complete_refF.pdf, 2899213 bytes, Datasheet for the atmega88/atmega168 μC
atmega48p_88p_168p_328p_F.pdf, 8617299 bytes, Datasheet for the atmega88p/atmega168p/atmega328p μC
doc8272.pdf, atmega644a, 26655335 bytes, Datasheet for the atmega644a μC
74hc595-st.pdf, 293333 bytes, Datasheet for the 74hc595 8-bit port expander
magjack-08B0-1X1T-03-F.pdf, 110073 bytes, Datasheet for 08B0-1X1T-03-F Magjack (RJ-45 with 10/100 Magnetics, 1:1 Turns Ratio, LED1 = Yellow, LED2 = dual Green/Orange), suitable for the enc28j60
magjack-08B0-1X1T-06-F.pdf, 117015 bytes, Datasheet for 08B0-1X1T-06-F Magjack (RJ-45 with 10/100 Magnetics, 1:1 Turns Ratio, LED1 = Yellow, LED2 = dual Green/Orange, AutoMDIX), suitable for the enc28j60
mpx4115A-freescale.pdf, 752751 bytes, Datasheet for mpx4115A, calibrated absolute pressure sensor
sht10_Data_Sheet_humidity_sensor_SHT1x_SHT7x_E.pdf, 673659 bytes, Datasheet for sht11, calibrated temperature and humidity sensor
ds18s20 high precision 1-wire digital thermometer, ds18s20.pdf, 279162 bytes, Datasheet for the ds18s20, calibrated temperature sensor
RECOM R-783.3-05 datasheet, 107664 bytes, Datasheet for the switching voltage regulator R-783.3-05
RECOM R-78E3.3-05 datasheet, 380957 bytes, Datasheet for the switching voltage regulator R-78E3.3-05

Documents

Resistor and capacitor codes guide, how color codes for resistors and value encoding on capacitors work.
tuxgraphics.org electronics section (exit shop), a collection of atmel microcontroller tutorials and articles.

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