Monthly Archives:: August 2008
Uncanny Resemblance….
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 image (C) Max Cannnon click to go to redmeat |
That would explain a lot wouldnt it?
Clear as Mud.
I am regularly sending ordinary people to look a the application sections of the datasheets for several electronic parts if they want to know how a part should be used. As I was laying out the motor boards for the weekends workshop I came across the following in the datasheet for the L239(not d) clone that Texas Intruments puts out.
Can you tell where the chip begins and the diagram ends? Can you tell that the diodes are (not really) included in the chip or would you add them to your parts count.?
Local Induction.
Build Your own USB to Serial Device
Note: This work is ongoing see the Benito info page for current info…
Introduction
This is a first take on using the Benito board to create an open source USB to Serial converter.
SPI4 USB to SPI converter
Note: This work is ongoing see the Benito info page for current info…
SPI4 is a MyUSB based firmware for the at90usb family of processors.
Missing Links and Moments of Truth.
Missing Links.
One of the joys of the Arduino Cult Induction Sessions is that mistakes and omissions are generally caught on the spot and there is no lag between the steps we forgot to include an the instructions and the person who’s board isn’t working.
NDA-ROX
I just spent the weekend with a few people who knew a lot more about programming the iphone than I did and several people that knew about as much as I did. I can tell you that the Portland group got the best of satellite category for our collectively built app. (If you look behind… Read more »
Arduino Code for Thought (spi slave)
This is something to chew on while I put together some bigger pieces.
See also AVR151 at http://www.atmel.com/dyn/products/app_notes.asp?family_id=607
/*
* This program lights pins 2-9 with data recieved via the spi port.
* it also resends the bytes back through the port.
*
* Based on Atmel application note avr151.
*
* Donald Delmar Davis, Tempus Dictum, Inc.
*/
#define SPI_SCK 13
#define SPI_MISO 12
#define SPI_MOSI 11
#define SPI_SS 10
void SPI_Init(void);