Post Created date
Pulsed slave clocks and dual voltage control with AVR
I use optoFETs. They're a bit more expensive but much easier to interface (just like a LED). If you're worried about simultaneous turnon use two output pins + external logic (NAND...
Wednesday, 31 January 2007 - 03:27
Bulk programming
Dean, That's approx what I was suggesting with some form of error control by comparing MISO from the others with the first (If it goes wrong, they all fail). If I was doing it for...
Monday, 29 January 2007 - 03:24
UART rs-485 (DMX -512) C Implementation
Google of course! http://www.epanorama.net/links/lights.html is a good start.
Tuesday, 23 January 2007 - 04:59
Frustration with SF LCD + atmega8
When I get a new (2nd hand) LCD module, I check the pinout by tracing (with an ohmmeter) from one of the pads that the metal cover's bent tags touch. At least one of them will be...
Thursday, 18 January 2007 - 03:03
Problem in detecting AT90USB1287 as a HID device in windows.
Try Snoopypro http://sourceforge.net/projects/usbsnoop/ and/or have a look at Jan Axelson's site http://www.lvr.com/
Tuesday, 16 January 2007 - 08:08
Bulk programming
Programming is a bi-directional process - but something like the method of detecting conflicting responses used in the one-wire recognition pass might work. [ this is off the top...
Monday, 8 January 2007 - 05:14
Supply Power to small device from phone line?
Quote:(Many years ago; let's just say that it was when we heated our soldering irons on the gas stove in the kitchen.) Glad to hear I'm not the only one I obtained a number of SI...
Monday, 18 December 2006 - 07:03
ATTiny2313 USART Problem
UARTS usually use a 16x clock and the start bit has to be present for about 10 samples out of the 16 (or at least present for the expected centre of the bit) to avoid 'false start...
Thursday, 14 December 2006 - 02:12
registers..
The ST version of the Z8 had 16 banks of 16 registers - you could chose/switch the 'working register' block of 16 but directly address all of them. Only about 20 of them were...
Wednesday, 13 December 2006 - 07:24
Mini Calculator
Have a look at http://www.atmel.com/dyn/products/app_notes.asp?family_id=607 There you will find things like AVR240: 4x4 Keypad-Wake Up on Keypress AVR241: Direct driving of LCD...
Wednesday, 13 December 2006 - 07:16
ATTiny2313 USART Problem
Most Async receivers will handle 25% telegraphic distortion so a slight clock slip is not usually a problem. Quote:Normally, the TXD pin would go through a driver that would...
Wednesday, 13 December 2006 - 07:04
Serial EEPROM Bootloader
You'll find the full spec at http://www.precma.it/download/intelhex.pdf or a simplified one that will do for most *.hex files at http://www.ii.uam.es/~etc1lab/pdf/intel_1.pdf. (...
Tuesday, 5 December 2006 - 12:19

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