The Propeller Backpack is a compact, multipurpose Propeller-based module that is optimized for audio and video applications. Out of the box, and without programming, it serves as a video character display for your microcontroller, communicate using a simple serial protocol. Any NTSC video monitor plugged into the Backpack’s A/V connector will then display the characters sent by your program – in color, in selectable windows, and with selectable character sizes.

The Propeller Backpack is also a fully-capable Propeller development platform, which you can program with Propeller Tool software. Uploading programs to it is a snap, either by using the free LoadBP software via any BASIC Stamp, or directly with the optional Prop Plug. The Propeller Backpack works in conjunction with your own firmware, or that from the Propeller Object Exchange (OBEX). The Propeller Backpack is expandable, too.

Features:
    External interface
    1/8” stereo phone jack for A/V signals, 3-pin servo header for power and serial I/O,     4-pin Prop Plug header, 12-position daughterboard socket
    Onboard Propeller chip and 10MHz crystal for up to 80MHz operation
    Double-size (64K x 8) EEPROM for programs and data
    Onboard sigma-delta analog input circuitry (2 channels)

Application Ideas:
    Provide programmable character overlays on top of an incoming video signal
    Send and receive data by radio at 1200 baud, using the AFSK modem software from the     OBEX and the built-in push-to-talk circuitry
    Generate line-level stereo audio output or simultaneous audio and video output
    Accept line-level audio input with or without simultaneous video output
    Generate synthetic speech

Key Specifications:
Power requirements: 4 – 6 V unregulated DC @ 20 – 150 mA, depending on application (5 V regulated DC is required when used with daughterboards.)
Interface: 1/8” stereo phone jack for A/V signals, 3-pin servo header for power and serial I/O, 4-pin Prop Plug header, 12-position daughterboard socket
Dimensions: 1.5 x 1.35 in. (38.1 x 34.3 mm)