Graphics Board
The Graphics Board lets you create a compact assembly with a 64x128 graphic LCD and a JeeNode (or JeeNode USB, or JeeSMD). Ports 2 and 3 are brought out to attach a variety of additional plugs.
The backlight resistor is chosen such that on 3.3V, this display draws 6 mA, and on 5V it draws 19 mA.
Note that this board is designed for the JeeNode v5 or newer. If you have a v3 or v4, you will have to mount the two left-hand caps differently because the ATmega is in the way. This does not apply to the JeeNode USB or the JeeSMD.
Note - the Graphics Board is powered directly from the PWR pin. This means you should power the JN + GB from 3.3 .. 5V or so, even though the JN itself supports up to 13V.
Configuration
There is one solder jumper, which determines how to supply power to the backlight: middle-to-P is the default, and drives the backlight from the PWR voltage. Use middle-to-I to connect the backlight to IRQ instead - this lets you control the backlight via software (including PWM dimming).
Header Pinouts
For the Ports, FTDI, PSIX, and SPI/ISP headers, see the JeeNode pinouts.
The 20-pin graphics connector details can be found in the schematic, see below.
Design Info
Dimensions: 67.1 x 51.5 mm
CadSoft EAGLE design files: see below.
How to Get It
http://shop.jeelabs.com/products/graphics-board
Related Weblog Posts
- 2010-11-15 - Meet the Graphics Board
- 2010-11-16 - Assembling the Graphics Board
- 2010-11-17 - Room Node display
- 2010-11-19 - Speedier graphics
- 2010-11-20 - Indoor temperature, etc.
- 2010-11-22 - The obligatory clock...
- 2010-11-23 - 100 KHz DSO
- 2010-11-25 - 2-channel Logic Analyzer
- 2011-01-05 - GLCD library
- 2012-01-24 - The PWR vs the +3V pin
