Progromino - Revision history

Cmounts at 20:37, 24 June 2012

2012-06-24T20:37:22Z

Surferdudemi: Added longer description of the new code and limitations of using LEDs as light sensors.

2012-04-27T06:51:57Z

Added longer description of the new code and limitations of using LEDs as light sensors.

Surferdudemi: /* Design */

2012-04-27T06:31:10Z

Design

Surferdudemi: Updated code files with new versions!

2012-04-27T06:28:04Z

Updated code files with new versions!

Surferdudemi: Typo fix

2011-06-03T23:04:19Z

Typo fix

Surferdudemi: Added origin of name, design info, and what to do with them

2011-05-07T03:48:00Z

Added origin of name, design info, and what to do with them

Surferdudemi at 03:46, 7 May 2011

2011-05-07T03:46:43Z

Surferdudemi: Added source code

2011-05-07T03:35:15Z

Added source code

Surferdudemi at 03:32, 7 May 2011

2011-05-07T03:32:26Z

Surferdudemi: Updated TODO list

2011-04-30T04:39:59Z

Updated TODO list

← Older revision		Revision as of 20:37, 24 June 2012
Line 38:		Line 38:
	==What to do With Them==		==What to do With Them==
	The bill of material ended up being fairly expensive to have a whole bunch of these lined up, though it would look very cool. To reduce the cost of having a large light show, the Progrominoes can be combined with a bunch of cheaper Le Dominoux in an arrangement like a model railroad track, where the Progrominoes act as switches between tracks of Le Dominoux.		The bill of material ended up being fairly expensive to have a whole bunch of these lined up, though it would look very cool. To reduce the cost of having a large light show, the Progrominoes can be combined with a bunch of cheaper Le Dominoux in an arrangement like a model railroad track, where the Progrominoes act as switches between tracks of Le Dominoux.
		+	[[Category:HOWTO]]

@@ Line 27: / Line 27: @@
 ==Design==
 This design uses LEDs as inputs.  The LEDs are chosen to minimize crosstalk between colors by taking advantage of the fact that LEDs respond to wavelengths shorter than those they emit.  Hence the blue sense LED is a slightly longer wavelength than the blue LED output.  The green sense LED is more yellow, so it will respond to green light (and blue light, but not red).  The red sense LED responds to all of the colors, unfortunately.  Still there is some separation, and if you line up a series of Progrominos, you'll find that the directionality as well as this separation by wavelength is pretty effective.
-[[File:ProgrominoDelta.asm|100px|thumb|Assembly language source file]]
+Here's the latest source code and programming file for the basic operation.  This new version uses an averaging algorithm to determine when the light level on each LED has increased, rather than using the input voltage level directly.  It also implements a way to flush the sample and hold cap internal to the processor, so that the input from one LED does not bleed over to the next sample for the next LED.  This is accomplished by setting the inputs to outputs and setting them to low.  This discharges the S&H capacitance.  Then the pins are set back to inputs and the input buffers are disconnected, allowing the S&H to charge before the ADC takes the next sample.  Timer 1 is used to set the charge time.
-[[File:ProgrominoDelta.hex|100px|thumb|File for programming device]]
 ==What to do With Them==
 The bill of material ended up being fairly expensive to have a whole bunch of these lined up, though it would look very cool.  To reduce the cost of having a large light show, the Progrominoes can be combined with a bunch of cheaper Le Dominoux in an arrangement like a model railroad track, where the Progrominoes act as switches between tracks of Le Dominoux.

@@ Line 29: / Line 29: @@
 Here's the source code for the basic operation, which simply turns on an LED when the respective input exceeds a threshold.
-[[File:progrominodelta.asm|100px|thumb|Assembly language source file]]
+[[File:ProgrominoDelta.asm|100px|thumb|Assembly language source file]]
-[[File:progrominodelta.hex|100px|thumb|File for programming device]]
+[[File:ProgrominoDelta.hex|100px|thumb|File for programming device]]
 ==What to do With Them==
 The bill of material ended up being fairly expensive to have a whole bunch of these lined up, though it would look very cool.  To reduce the cost of having a large light show, the Progrominoes can be combined with a bunch of cheaper Le Dominoux in an arrangement like a model railroad track, where the Progrominoes act as switches between tracks of Le Dominoux.

@@ Line 29: / Line 29: @@
 Here's the source code for the basic operation, which simply turns on an LED when the respective input exceeds a threshold.
-[[File:progromino.asm|100px|thumb|Assembly language source file]]
+[[File:progrominodelta.asm|100px|thumb|Assembly language source file]]
 ==What to do With Them==
 The bill of material ended up being fairly expensive to have a whole bunch of these lined up, though it would look very cool.  To reduce the cost of having a large light show, the Progrominoes can be combined with a bunch of cheaper Le Dominoux in an arrangement like a model railroad track, where the Progrominoes act as switches between tracks of Le Dominoux.

← Older revision		Revision as of 23:04, 3 June 2011
Line 32:		Line 32:

	==What to do With Them==		==What to do With Them==
−	The bill of material ended up being fairly expensive to have a whole bunch of these lined up, though it would look very cool. To reduce the cost of ~~have~~ a large light show, the Progrominoes can be combined with a bunch of cheaper Le Dominoux in an arrangement like a model railroad track, where the Progrominoes act as switches between tracks of Le Dominoux.	+	The bill of material ended up being fairly expensive to have a whole bunch of these lined up, though it would look very cool. To reduce the cost of having a large light show, the Progrominoes can be combined with a bunch of cheaper Le Dominoux in an arrangement like a model railroad track, where the Progrominoes act as switches between tracks of Le Dominoux.

@@ Line 1: / Line 1: @@
 We don't need no stinking 555 timers!  We have an AVR in the same form-factor!
 The goal of this project is to design an electronic domino using a small AVR chip and minimal components, but at the same time provide a huge amount of flexibility and capability.  Here's the 555 version:
@@ Line 9: / Line 11: @@
 [[File:progromino.png|600px|thumb|left|Schematic for board]]
 TODO
@@ Line 21: / Line 22: @@
 * Demo mode where outputs are turned on in different sequences
 * Use an averaging algorithm to adjust to ambient light conditions
 ==Design==

@@ Line 9: / Line 9: @@
 [[File:progromino.png|600px|thumb|left|Schematic for board]]
 TODO
@@ Line 15: / Line 16: @@
 . For the initial version, was not able to incorporate the switch (too expensive for switch and PCB space). Need to come up with a suitable H/W and S/W solution.  Springy wire?  Using ATTiny44A provided a complete SPI interface and one extra unused pin!
-. Update schematic.  The LEDs used for sensing the light input are upside down!
+. Write some more demo programs.  Ideas:
 [[File:progromino.asm|100px|thumb|Assembly language source file]]

@@ Line 7: / Line 7: @@
 And here's the current design:
-[[File:progromino.png|600px|thumb|left|alt text]]
+[[File:progromino.png|600px|thumb|left|Schematic for board]]
 TODO
@@ Line 16: / Line 16: @@
 . Update schematic.  The LEDs used for sensing the light input are upside down!