What is it?

An intervalometer is a remote control for your camera, which will trigger the shutter automatically at the desired interval set by you. Used mainly in time-lapse photography or long exposure continuous shots, star trail photos or even daylight photos.

Why did you make it?

To support the DIY photography community

What makes it special?

The board consists of an Atmega328 chip soldered at the back side of the board. It needs the crystal oscillator of 16MHz to function properly. The chip is programmed using another Arduino Nano connected to the programming headers given on board. The board is equipped with a micro USB type a port for powering up the microcontroller. DO NOT GIVE MORE THAN 5 V on USB.

Total 5 switches for selecting the menus plus one reset switch is provided for selection.

• Select switch is used for selection of the menu navigating inside the menu.

• Left switch acts as a back button from the menu.

• Up and Down switches are used for increment or decrement of values.

• Right switch is used for storing the values in memory

It uses Optocoupler from Toshiba Semiconductors Inc. It isolates the camera ground and the 5 V supply ground. The optocoupler makes it completely safe to operate. The intervalometers available in the market make use of transistors in which small current flows through the camera making it vulnerable to damage, though the possibility of happening this is very negligible.

Using the intervalometer

• Photos to take--- Select the number of photos to take and press right key to store
• Delay--- Set the delay according to the time required to clear the buffer of your camera. (Advisable to set at least 2 s)
• Set time value (Tv in min and s)-- You have to set your DSLR in bulb mode for using the intervalometer in values other than fractional times (like 1/20s, 1/2000s, etc). If you want to take photos with 1s shutter speed, then still you have to store Tv in minutes as 0. For photos having fractional Tv, set the Tv in camera and in intervalometer, set Tv in seconds as 1s.
• Confirm--- Double check the values you have set on the display.
• Ready to shoot--- Once confirmed the values, you can press RIGHT key to start shooting.

Once the shooting is finished, it will ask you to start again if you want or you can just reset the microcontroller and move to processing.

Specifications--

• Pocket-sized intervalometer
• Standalone Atmega328 microcontroller
• Optocoupler for separating the camera pins from other circuitry on board
• Micro USB for power in
• 2.5mm jack supporting Canon DSLRs

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