Raspberry Pi - Project #1: GPIO to Breadboard Breakout
Using the breakout adapter and an old floppy drive cable. The cable is too big by eight holes but the excess can just hang off the end.
| Make | Canon |
| Model | Canon EOS 5D Mark II |
| Exposure | 0.04 sec (1/25) |
| Aperture | f/5.0 |
| Exposure Program | Aperture-priority AE |
| ISO Speed | 200 |
| Date and Time (Original) | 2012:05:06 13:29:54 |
| Exposure Bias | +1 EV |
| Flash | Off, Did not fire |
| Focal Length | 80 mm |
| Quality | Fine |
| Metering Mode | Evaluative |
| Lens Type | Canon EF 24-105mm f/4L IS |
| Camera Temperature | 16 C |
At Last!
My Raspberry Pi has arrived.
| Make | Canon |
| Model | Canon EOS 5D Mark II |
| Exposure | 0.05 sec (1/20) |
| Aperture | f/4.0 |
| Exposure Program | Aperture-priority AE |
| ISO Speed | 400 |
| Date and Time (Original) | 2012:05:04 19:44:51 |
| Exposure Bias | +1 EV |
| Flash | Off, Did not fire |
| Focal Length | 105 mm |
| Quality | Fine |
| Metering Mode | Evaluative |
| Lens Type | Canon EF 24-105mm f/4L IS |
| Camera Temperature | 23 C |
Cress in Progress
For the next five days this is happening in the cupboard. Cress really moves fast, the seeds started swelling as soon as I put them on the cotton wool.
| Make | Canon |
| Model | Canon EOS 5D Mark II |
| Exposure | 0.008 sec (1/125) |
| Aperture | f/4.0 |
| Exposure Program | Aperture-priority AE |
| ISO Speed | 200 |
| Date and Time (Original) | 2012:04:17 21:38:17 |
| Exposure Bias | +1 EV |
| Flash | Off, Did not fire |
| Focal Length | 24 mm |
| Quality | Fine |
| Metering Mode | Evaluative |
| Lens Type | Canon EF 24-105mm f/4L IS |
| Camera Temperature | 22 C |
Cyanotype Experiment - UV LEDs Result
| Make | Epson |
| Model | PerfectionV500 |
Cyanotype Experiment - UV LEDs
I tried an experiment to see if UV LEDs would work to expose cyanotype sensitised paper, turns out they do. I used three puny standard LEDs, first within a centimeter of the paper to make sure something happened, after about five minutes they had left some good amber splodges. Then I set it up like this with the LEDs about 30cms from the paper and part of a floppy drive motor (probably) to leave an interesting pattern, left for about an hour. See the next picture for the result.
I’ll be getting hold of a 10W UV LED soon. This should make unreliable sunny days much less of a problem.
| Make | Canon |
| Model | Canon EOS 5D Mark II |
| Exposure | 0.8 |
| Aperture | f/4.0 |
| Exposure Program | Program AE |
| ISO Speed | 200 |
| Date and Time (Original) | 2011:04:02 15:54:44 |
| Exposure Bias | 0 EV |
| Flash | Off, Did not fire |
| Focal Length | 24 mm |
| Quality | Fine |
| Metering Mode | Evaluative |
| Lens Type | Canon EF 24-105mm f/4L IS |
| Camera Temperature | 21 C |
LED display and clock
My latest project. I’ll write this up properly at some point. The plan is that it usually displays the time and scrolls messages when instructed to over the serial port, and possibly more.
| Make | Canon |
| Model | Canon EOS 40D |
| Exposure | 0.017 sec (1/60) |
| Aperture | f/2.0 |
| Exposure Program | Program AE |
| ISO Speed | 800 |
| Date and Time (Original) | 2010:10:30 19:54:32 |
| Exposure Bias | 0 EV |
| Flash | Off, Did not fire |
| Focal Length | 30 mm |
| Quality | Fine |
| Metering Mode | Center-weighted average |
| Lens Type | Canon EF 14mm f/2.8L or Sigma Lens |
| Camera Temperature | 18 C |
LoL - Lots of LEDs
| Make | Canon |
| Model | Canon EOS 40D |
| Exposure | 0.005 sec (1/200) |
| Aperture | f/1.6 |
| Exposure Program | Aperture-priority AE |
| ISO Speed | 500 |
| Date and Time (Original) | 2010:03:21 15:53:23 |
| Exposure Bias | 0 EV |
| Flash | Off, Did not fire |
| Focal Length | 30 mm |
| Quality | Fine |
| Metering Mode | Center-weighted average |
| Lens Type | Canon EF 14mm f/2.8L or Sigma Lens |
| Camera Temperature | 25 C |
It Works!
I had neither Arduino nor batteries. So I made do with an atmega168 with an Arduino bootloader burned and connecting to a power supply with the servos running off the 5V regulator, which got very hot.
| Make | Canon |
| Model | Canon EOS 40D |
| Exposure | 0.017 sec (1/60) |
| Aperture | f/2.5 |
| Exposure Program | Aperture-priority AE |
| ISO Speed | 500 |
| Date and Time (Original) | 2009:09:02 21:41:09 |
| Exposure Bias | 0 EV |
| Flash | Off, Did not fire |
| Focal Length | 50 mm |
| Quality | Fine |
| Metering Mode | Center-weighted average |
| Lens Type | Canon EF 50mm f/1.8 MkII |
| Camera Temperature | 22 C |
Homemade Arduino
This is a fully Arduino-compatible setup based on the Arduino breadboard except with a USB to serial converter and an RS232 level shifter instead of the FTDI chip. I used the parallel cable I’d made previously to burn the bootloader, then I was able to program it and to communicate with it via USB. This was all done using the normal Arduino software on Linux.
| Make | Canon |
| Model | Canon EOS 40D |
| Exposure | 0.017 sec (1/60) |
| Aperture | f/5.6 |
| Exposure Program | Normal |
| ISO Speed | 400 |
| Date and Time (Original) | 2008:05:21 22:32:53 |
| Exposure Bias | 0 EV |
| Metering Mode | Pattern |
| Flash | Flash fired |
| Focal Length | 47 mm |
| Lens Type | EF-S17-85mm f/4-5.6 IS USM |
My First Microcontroller
I finally got round to trying my hand at microcontroller programming. Following this instructable it was dead easy.
The main problem I ran up against was in the software. On Linux you need the ppdev module in order to have access to /dev/parports. In menuconfig it’s Device drivers -> Character devices -> Support for user-space parallel port device drivers.
On Debian you need the following packages: avr-libc binutils-avr gcc-avr avrdude Your user also needs to be in the lp group for access to the parallel port.
| Make | Canon |
| Model | Canon EOS 300D DIGITAL |
| Exposure | 0.02 sec (1/50) |
| Aperture | f/5.6 |
| ISO Speed | 800 |
| Date and Time (Original) | 2007:06:14 10:59:35 |
| Exposure Bias | 0/3 EV |
| Metering Mode | Pattern |
| Focal Length | 50 mm |