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lpfthings
Sat Jul 18 2009, 11:46AM
lpfthings Registered Member #1361 Joined: Thu Feb 28 2008, 10:57AM
Location: Cairns, Australia
Posts: 305
Unintentional wood burn fractals on my desk after playing with the flyback:


Fractals


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Hon1nbo
Sat Jul 18 2009, 04:20PM
Hon1nbo Registered Member #902 Joined: Sun Jul 15 2007, 08:17PM
Location: Pacific Northwest USA
Posts: 1042
@ lpfthings

have you ever tried controlled wood burning with High Voltage? - it creates very fine detail, and the pen is not as heavy as a soldering iron - even if you only did that on accident, I thought you might find it interesting
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Dragon64
Mon Jul 20 2009, 07:25PM
Dragon64 Registered Member #1438 Joined: Sat Apr 12 2008, 12:57AM
Location: Canada
Posts: 218
Hey DaJJHman, what type of camera are you using to capture those water droplet photo's?
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Hon1nbo
Tue Jul 21 2009, 04:04AM
Hon1nbo Registered Member #902 Joined: Sun Jul 15 2007, 08:17PM
Location: Pacific Northwest USA
Posts: 1042
hydraliskdragon wrote ...

Hey DaJJHman, what type of camera are you using to capture those water droplet photo's?

Casio EX-FH20 in the 40 FPS mode - I have been successful using a film camera, a canon AE-1, and a homemade flash setup but I wanted instant results in this case...

the Key to such photos is not so much the camera as it is the setup of the scene - placement of two different colors, proper and even lighting, proper dropping of the drop (I have made several that were not strait!), and stillness of the water...
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Robert2
Thu Jul 23 2009, 07:11AM
Robert2 Registered Member #1773 Joined: Tue Oct 21 2008, 06:56PM
Location: Poland
Posts: 93
20 1248331384 Thumb

68 1248331415 Thumb
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Killa-X
Fri Jul 24 2009, 03:57AM
Killa-X Registered Member #1643 Joined: Mon Aug 18 2008, 06:10PM
Location:
Posts: 1039
I decided to make a circuit board for my segments I got. Sadly, Seeing these are from goldmine, They never said it was ++ input, and the segments are -. This makes it hard because usually, I put a microcontroller ports (+) to each segment. Then I use transistors to turn on/off each segments ground pin. Sadly, these are flipped. I have to use Transistors to change the 7 segments, and use ports to change what one lights up.

This was my first double sided PVC. I created the board from scratch in eagles, Printed to high gloss photopaper, Matched it by holding a light behind it, Taped then stapled it together. Then I slipped a copper clad into the pouch I made (taped 3 sides of the design) and Iron it. I put my Iron to linen, Pushed down hard for 30 secs, light tip rubbing, 30..tip..30..tip..30..30..and flipped. It came out flawless, So much ironing that it was a mess! The holes were less than 1/8 of a mm off because the staples I put to hold the board, caused the design to miss-match :'( But hey, still lines up, still works! Pictures! I don't make boards often, I understand if this isn't the compact way to do it :(

ThTh-Flash Shows under layer.
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big5824
Fri Jul 24 2009, 10:50AM
big5824 Registered Member #1687 Joined: Tue Sept 09 2008, 08:47PM
Location: UK, Darlington
Posts: 240
Thats going to take a lot of outputs from your microcontroller, have you considered using multiple shift registers? Im currently driving three 7 segments using only 3 outputs from my PIC thanks to them.
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Hon1nbo
Fri Jul 24 2009, 01:12PM
Hon1nbo Registered Member #902 Joined: Sun Jul 15 2007, 08:17PM
Location: Pacific Northwest USA
Posts: 1042
Killa-X wrote ...

I decided to make a circuit board for my segments I got. Sadly, Seeing these are from goldmine, They never said it was ++ input, and the segments are -. This makes it hard because usually, I put a microcontroller ports (+) to each segment. Then I use transistors to turn on/off each segments ground pin. Sadly, these are flipped. I have to use Transistors to change the 7 segments, and use ports to change what one lights up.

This was my first double sided PVC. I created the board from scratch in eagles, Printed to high gloss photopaper, Matched it by holding a light behind it, Taped then stapled it together. Then I slipped a copper clad into the pouch I made (taped 3 sides of the design) and Iron it. I put my Iron to linen, Pushed down hard for 30 secs, light tip rubbing, 30..tip..30..tip..30..30..and flipped. It came out flawless, So much ironing that it was a mess! The holes were less than 1/8 of a mm off because the staples I put to hold the board, caused the design to miss-match :'( But hey, still lines up, still works! Pictures! I don't make boards often, I understand if this isn't the compact way to do it :(

ThTh-Flash Shows under layer.


I have an I/O Expansion Board from a Dual Core Arduino Beta Testing Project - it has two output resisters, and two for input - registers are in place, it just needs a few support components like caps and, optionally, a resistor network - I'll send it to you if you want, as I don't think I will be using it any time soon
the registers are as follows: 2x MC74HC595AN and 2x CD4021BE

the board design can be found in the thread: here

there are 15 pages in that thread, and I don't have time to sift through at the moment, but the expansion board design should be within the first few pages IIRC

Jimmy
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Killa-X
Fri Jul 24 2009, 03:27PM
Killa-X Registered Member #1643 Joined: Mon Aug 18 2008, 06:10PM
Location:
Posts: 1039
big5824 wrote ...

Thats going to take a lot of outputs from your microcontroller, have you considered using multiple shift registers? Im currently driving three 7 segments using only 3 outputs from my PIC thanks to them.

Usually Even when I use to run 8 segments, I connected all 7 led inputs together and used transistors to tell which one to light. So it would be like telling them to all be 8, light 1. all be 5, light 2. etc but at a high speed...But I do have over 32 outputs total so cheesey

DaJJHman, Not sure if boards made for that programmer will be the same as me using AVR chips.
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Hon1nbo
Fri Jul 24 2009, 04:06PM
Hon1nbo Registered Member #902 Joined: Sun Jul 15 2007, 08:17PM
Location: Pacific Northwest USA
Posts: 1042
Killa-X wrote ...

big5824 wrote ...

Thats going to take a lot of outputs from your microcontroller, have you considered using multiple shift registers? Im currently driving three 7 segments using only 3 outputs from my PIC thanks to them.

Usually Even when I use to run 8 segments, I connected all 7 led inputs together and used transistors to tell which one to light. So it would be like telling them to all be 8, light 1. all be 5, light 2. etc but at a high speed...But I do have over 32 outputs total so cheesey

DaJJHman, Not sure if boards made for that programmer will be the same as me using AVR chips.

it's not a programmer, it is an I/O expansion board for microcontrollers based off of Shift Registers - it just takes one of your PIC/AVR/whatever outputs and expands it to as if you had extra addressable outputs...
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