JPEG Trigger

Product description

The JPEG Trigger interfaces with the UART controlled JPEG Color Camera to simplify picture taking. To take a picture, all you need to do is ground either of the two external interrupts, which are labeled '0' and '1' on the board; a picture is then snapped and saved to a microSD card. The on-board ATmega328 is programmed to handle all the communication with the JPEG camera and the SD card.

The JPEG Trigger's firmware creates a FAT16/FAT32 filesystem on any microSD card with a capacity of 4GB or less. Each picture taken is saved as an individual 640x480 JPEG file.

Power on the JPEG Trigger is regulated to 3.3VDC, and the on-board JST connector allows you to power the board via one of our LiPo batteries. We've broken the serial pins out to two headers - one is for connecting the JPEG camera, and the other mates with our FTDI Basic Breakout board for debugging or other purposes. We've also broken out a number of the ATmega328's analog pins for custom use.

An RGB LED is populated on the board to show what state the Trigger is in. Here's what the LED is telling you about the Trigger:

• If you've just started it up and the LED is solid red, then the file system hasn't been initialized (make sure there's an SD card inserted).
• If the LED is blinking red, then it's unable to communicate with the camera. Make sure it's wired up correctly.
  
• If the LED blinks blue, then everything is A-OK and the board is awaiting a trigger.
  
• Green blinking means that the JPEG Trigger is in the process of taking a picture. After you take a picture, it should go back to blinking blue.

Note: This product does not come with the JPEG Color Camera or an SD card, you'll need to purchase those items separately.

Dimensions: 2.20  x 1.10" (55.88 x 27.94mm)

Documents:

• Schematic
• Source Code

DEV-09459