Bulb Ramper Shield for Arduino

Features:
Regular Intervalometer or Bulb Ramper.
Millisecond timing precision.
ISO or Aperature stepping in full stops or part stops.
Stops/100pictures and Stops/hour displays.
RGB LCD screen.
Flashlight.
Auxiliary trigger output (to connect to motion systems like Dynamic Perception or Chronos).
Interval Ramping.
Interval Oscillator.
Manual or automatic x-time.
Collision alarm.
Easy to update or change the code.

The Bulb Ramper Shield is available in 2 versions: the Shield and the Standalone. The difference between them can be summarized as follows:


The Shield version is like the assembled MX2 DIY Kit. It requires an Arduino Uno to run, but that makes it easy to upload new code. It can be powered from a USB or the 12V external jack on the Uno. It is also easy to download the ramping data using the Arduino Serial Monitor.

The Standalone version does not need the Uno. It has the Atmega328 built in, as well as a voltage regulator circuit. It is powered by 2x AA batteries and also has a 12V jack for DC Power. The Standalone version can be converted to a shield by soldering on header pins, and inserting it into a Uno that has the '328 removed. The code cannot be changed and the ramping data cannot be downloaded unless it has been converted to a shield.

The Shield cannot be easily converted to a Standalone. 

Note also that I do not supply the Arduino, you will have to get that yourself if you get the Shield (click here to see the list of official Arduino distributors). Also, buying a Shield ($85) and Arduino ($30) would be about the same as buying a Standalone ($115), so you should weigh the benefits of both without regards to the price.


Included when you buy the Shield or Standalone is a 3.5mm to 2.5mm TRS cable used to connect your camera to the Bulb Ramper Shield. Also you will get a PC to 3.5mm cable, as well as a 3.5mm extension cable. If your camera does not have a PC flash port, you will need to also get an adapter that goes on the hot shoe.
I can also supply canon N3 adapters ($10) for those who need one.

Note for users of the Canon 6D:
It appears that the Canon 6D has a different bulb mode, which makes it difficult to achieve accurate shutter speeds. Under normal settings, it appears to make each photograph 78 milliseconds longer than desired. This can be partially alleviated by setting the x-time (page C8) to approximately 64ms. The shutter speed will then be approximately 14 milliseconds longer.