One of my current projects is an Arduino powered camera trigger. I made one using my Arduino a laser pointer, and my digital camera. At first I thought it would be no big deal, but it took a little more effort because of the camera I was using. My Canon Powershot does not allow for remote shutter controll by default, but after a little inernet-vestigation I stumbled on the CHDK (Canon Hack Development Kit). After some firmware hacking and a couple components; I was up and running…
The Key is the CHDK firmware that allows the remote shutter trigger. The laser reflects off of a mirror onto the photoresistor. The photoresistor is being measured by Analog 0. When the beam is broken the Arduino runs through a series of high and low on digital 12 (with varying delay to account for the auto focus feature of the camera). This then triggers the camera to focus and take a picture.
Connecting the camera to the Arduino is done by modifying a mini USB cable. There is a USB remote cable page on the CHDK wiki with instructions/diagrams for making a Homebrew remote. So I just used that but left out the switch and battery because the Arduino would act as the switch power source. We’ll be using the +5V (red wire) and Ground (black wire) – (see below for picture of cable, code, and more pics)
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
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