Type in the full discussion title or a part of it.
Discussion Title Created date
Choosing a transistor for a one way AVR->24V level conver
I have 3.3V or 5V or similar data signals coming out of my AVR (possibly an Arduino) and I have a device that wants 24V serial data (it's bastardized DMX in a Phillips Color...
Sunday, 13 October 2013 - 17:24
Offset breadboard power rails?
Half of the breadboards I own or use (at makerspaces, etc) have the power rail holes offset by half a row, the other half have them on the same grid as the main holes. Half of all...
Friday, 17 August 2012 - 13:46
Electronics Goldmine surprise boxes
On a whim I ordered a few things from goldmine-elec.com, including a few specific parts for projects I am already working on. Aside from those, I got one Mini Free Surprise Box...
Tuesday, 23 December 2008 - 10:11
640x200 LCD controller
I got my hands on some LCDs, like the one described here. With 4-bit input, it will take 32000 writes to refresh the screen. At 17 cycles per write (a number I saw quoted...
Monday, 22 December 2008 - 21:40
240x160x9bit LCD
http://www.goldmine-elec-product... http://www.datasheetcatalog.org/... I could control this with an AVR with 12 free pins (or less pins, a shift register, and more demanding code...
Thursday, 11 December 2008 - 00:12
attiny261 vs attiny2313
It came up in #avr on freenode that the 261(V) may be a good general-purpose chip to fill the same slot in my parts cabinet that I picked the 2313(V) for. 2313 261 18 16...
Tuesday, 9 December 2008 - 03:33
longer delay implementation
// This function basically wastes time void delay_ms( uint16_t milliseconds) { for( ; milliseconds > 0; milliseconds--) { _delay_ms( 1); } } I assume the...
Saturday, 29 November 2008 - 04:55
logarithmic LED brightness function
I want to take a 0-255 brightness value and convert it to an approximately linear increase in LED brightness for use in PWM. I also wanted to minimize processor usage without...
Tuesday, 18 November 2008 - 04:50
global register variable, used but unused
I have a global variable, foo. I increment it once, then use it as an operand for various bits of comparison and arithmetic. When I make it a global register variable in r5 then...
Tuesday, 11 November 2008 - 19:29
Efficient charlieplexing algorithm?
I am familiar with the concepts of multiplexing and charlieplexing. I am trying to find an algorithm for driving a charlieplexed LED array more efficiently than one LED at a time...
Friday, 31 October 2008 - 22:10
Input schema with just a Vcc toggle
For my current project I have inherited a device layout particularly lacking in inputs, and adding inputs is not an option (for now). The device has a single 3-position switch,...
Tuesday, 28 October 2008 - 02:31
WinAVR in wine, make: Interrupt/Exception at each step
Each time I "Build" from AVR Studio using WinAVR 20080610 I get an exception in make. The step in question succeeds, but this means I have to hit F7 three times (or more) to...
Tuesday, 28 October 2008 - 00:12

Pages