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== Frida Control Panel V3 for the box UNDER DEVELOPMENT ==

Still pretty much the same idea, implemented on a custom circuit board with the atmega168 chip and max7219 led drivers among notable parts. It is arduino-compatible trough a FTDI USB cable. Uses segment led bars for display of measurements. Interfaces the air quality and weather sensors. Keeps an eye on the battery voltage too. 

== Frida Control Panel V2 with Arduino for USB ==

Very similar to the V1 except connected to the computer trough an arduino instead of a parallel port. 
The needed firmware code for the Arduino is (sorry, missing at this time, [[User:Luka][ucanbugme!]])

The serial protocol is line oriented with the first character being the command. Some example lines: 
 s 1 1 0 0
 s 7 1 1 0
 w 0 0
 w 1 0
 w 1 1
 w 2 0
 b 1
 b 2

;s ''sw1'' ''sw2'' ''btn'' ''sens'': switch, button and sensor states sent by the panel
;w ''led'' ''state'': led states sent to the panel: 0 off, 1 on, 2-255 intensity
;b ''led'': led blink requests sent to the panel

== Frida Control Panel V1 for parallel port ==

The blinkenlights panel connects to the computer at the parallel port.

It shows status of the system: power, network, recording, gps fix.
It allows triggering of media recording, setting waypoints and 
selecting an icon representing a keyword. 

=== Control panel layout ===

The layout of controls and indicators can be seen in the picture below, 
available also as an 
[http://ljudmila.org/~luka/frida/frida-v-control-panel-stickers.svg SVG file].

http://ljudmila.org/~luka/frida/frida-v-control-panel-stickers.png

=== Pinout on the LPT port  ===
 1 - input, buttonpressed
 2 - output, resetbutton
 3 - output, LED INET 1
 4 - output, LED INET 2
 5 - output, LED REC
 6 - output, LED GPS
 11 - input, SW1 bit 1 
 12 - input, SW1 bit 2 
 13 - input, SW2 bit 1
 14 - input, SW2 bit 2
 15 - input, SW2 bit 4

=== Control panel schematic ===

there is also a [http://www.ljudmila.org/~luka/frida/frida-control-panel-schematic.png bigger] version suitable for printing

http://www.ljudmila.org/~luka/frida/frida-control-panel-schematic-small.png