|Surveyor Robotics Journal|
Mon, 09 Mar 2009
Expansion board option for standalone SRV-1 Blackfin Camera
We are now offering an expansion board option for standalone SRV-1 Blackfin cameras.
Intended for those who have purchased a standalone SRV-1 Blackfin Camera, the SRV-1 Base Expansion Module includes a 3.3V regulator for battery operation (4.5V - 18.0V), header for Matchport radio, option for XBee radio header, extended pins on underside of board for 32-pin SRV-1 expansion header as well as 2-pin battery power header.
This board does not include the FAN8200 H-bridge or laser pointer drivers provided with the Wifi Expansion Module, nor does it include any radio modules. However, for users interested in interfacing the SRV-1 Blackfin Camera directly to serial ports or other radios, this is a convenient option.
Check our online store for availability.
New low-light camera option for SRV-1/SVS Blackfin
We just received our first batch of camera boards with Omnivision OV7725 low light color sensors.
OV7725 pixels are 6um x 6um, which is 4x larger than OV9655 pixels, and the chip is optimized for low light conditions. Resolution is limited to 640x480, 320x240, or 160x120, but capture frame rate is as high as 60 frames/second (actually, 55fps because of our 22MHz clock) in all resolutions.
The new camera modules are now available for $55 with choice of 3.6mm f2.0 lens or 2.2mm f2.5 lens. Check our online store for availability.
Note that an SRV-1 firmware update is required to auto-detect the OV9655 or OV7725 module.
Here is a comparison in equal low light conditions of the OV7725 (top) and OV9655 (bottom), both with 3.6mm f2.0 lens. The OV9655 lens actually isn't out of focus, but camera noise reduction filtering creates that impression. In full light conditions, images from the two modules are comparable, with OV9655 images somewhat more fully saturated than the OV7725.
Omnivision OV7725 Camera Board
Omnivision OV9655 Camera Board