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Nikon D50/D70 IR remote control
Posté le 27th septembre 2008 9 commentairesThe Project
After chasing the idea of building a remote for my D50, I found this really interesting page with all you need (especially the IR timing) to get your remote up and running.
But using a AtTiny2313 for this leaves a lot of room to play with. So I made an enhanced version with a 7-segments display and a menu system. The new firmware let’s you choose among several shooting modes.
The remote is almost identical to the BigMike’s one except :
- the firmware is, of course, modified
- there is no On/Off button
- there are two buttons for the menu (change/select)
- there is a 7-segments display for the menu
Remote control
The firmware sets the Tiny2313 in sleep mode after 5 seconds of inactivity.
In tis mode, the datasheet gives at most 2µA current usage. So, since a CR2032 yields 220 mAh, and if I didn’t mess up somehere, you should be up and running for 10 years.Modes description
The remote offers 9 shot modes, which of course can be changed in the firmware.
Whatever the mode, the dp dot blinks everytime a « take shot » IR frame is sent.
- Single shot mode (symbol : reversed lower ‘c’) : one button press makes a single shot
- Double shot mode (symbol : two horizontal dashes ) : one button press makes two shots in a row
- Triple shot mode (symbol : three horizontal dashes ) : one button press makes three shots in a row
- Continuous shot (symbol : lower ‘c’) : one button press starts continuous shooting as fast as possible until the ‘menu’ button is pressed again or the battery is dead
- Continuous shot every second (symbol : number 1) : one button press starts shooting 1 picture per second until the ‘menu’ button is pressed again or the battery is dead
Numbers 2, 5, 0 and 6 are also continuous shoot mode with 1 picture every 2, 5 10 and 60 seconds respectively.
Modes selection
Files
Wanna build yours ? You’ll need :
Circuit schematic
Circuit board layout
The core of the code (IR timing loop) is taken straight from BigMike’s ASM source.
Issues
There are some issues in my version. I am not sure if they are firmware/hardware/ir issues. The problem is the reliability of triggering : sometimes it just doesn’t work. This does make the remote of reduced usability for continuous shooting modes where timing is critical.
I wonder where this problem comes from : IR receptor low sensitivity ? inaccurate frequency generation ? AF mode induced triggering problems in some situations ?
Since I have relatively few hardware here (no friend with another D50, no oscilloscope, …) I didn’t dig it up for now.And oh, BTW, the usual warnings apply : this remote can brick your MCU, destroy your Nikon, set your house on fire, etc… You’ve been warned !
Thanks
Big thanks to Bighignoli Michele, Jonas Diemer and Nate who pioneered the area.
EDIT : I finally managed to put my hands back on the firmware ! You can grab the ASM source or the hex file. Have fun !
9 réponses à “Nikon D50/D70 IR remote control”
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So wher is the sorce code?
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@guillo : thanks for your feedback !
@dekemp : well, as stupid as it seems, I can’t put my hands back on it
Basically, it was BigMikes one with some mino modification (buttons handling, 7 segments display, and loop processing for modes). I will probably create a newer version based on TSAL 6100 IR LED one of these days. I can dump the hex firmware if you need it, just let me know. -
perhelion 14th décembre 2008 à 13:31
do you can dump the hex firmware or source code in C++?
merci beaucoup -
giorgio 3rd mars 2009 à 16:54
Hi there!
I am not used to electronics nor hardware programming, but maybe my issue can be a good suggestion for you.
In astronomy the use of a DSLR is a cheap way to substitute a pro ccd imager (quite expensive). It is often necessary to use an exposure time greater than 30 ».
Surely, such long shots are possible by using the « B » exposure, but doing it manually lacks in precision (for example, I would need to take 20 shots exactly 120 » long).
Unfortunately, Nikon do not provide any tool to do it (remote sw controls by Canon can do it on their cameras) and it is a very, very, very striking lack for amateur astronomers using Nikon DSLR.
My question is: is it possible for you to modify your equipment in order to make it possible to shot exactly n-minutes « B » exposures?
I guess Nikon-based astronomers would be happy to know that you can do it!Feel free to contact me for extra informations about this topic
Best regards
Giorgio -
admin 3rd mars 2009 à 17:08
Hey Giorgio,
Yes, this is possible for sure. But you might be interested in gphoto2 which use the PTP protocol (supported on most DLSRs) to drive cameras.
It works on linux only, but does a great job in taking picture sequences. You can adjust everything for your shots from the command line (aperture, speed, w/b, etc…). It’s simply great.
If you’re not a linux freak, I can give a hand if you want to build a Nikon remote. It would be pretty simple to make a special version that connects to a serial port so you can program it the way you want.Hope it helps, cya.
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giorgio 5th mars 2009 à 20:01
Thank you for your prompt answer, Cya!
There are a couple of issues about the PTP+gphoto mode.
The first problem seems to be (I’ve only red about, never tried) the increased energy need when working in PTP mode: a DC feed would be required, and it is far from costless. I will try to make some experiments without DC feed, but I fear that it will be hard to be operational for at least 1h with only 1 battery pack.
The second problem (for astronomy/science imaging) is that unfortunately Nikon applies a low-pass filter also to RAW images before saving. The only method (called MODE3) to avoid it is to take the shot and shut down the camera when taking the dark exposure (noise reduction). In this way the camera is forced to save the data without applying the dark subtraction nor the filtering. A subsequent MODE3 shot with plugged lenses will provide the dark exposure.
Now, I suspect that all those shutting down/powering up the camera will not help so much the connection between camera and PC…
For this reasons, I would prefer to have a remote performing it, or at least something connected to a serial/usb on the pc. At the moment I’m trying to make my old toshiba satellite IrDA port working with lirc, but it seems i have some problems with modules (a lot of literature is present on the net about it)
About building the remote, fortunately I have friends knowing linux in depth and with some electronics skills. If you can give me some hints, I could ask them to do all the sw/hw work…
Thank you again, feel free to contact me directly to my e-mail if needed
Giorgio -
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dekemp 6th novembre 2008 à 23:41