Digimer: Created page with '{{na_header}} Availability of parts forced a slight change from v1.1.2 to this version: = Part List = * Based on the Arduino [http://arduino.cc/en/Main/ArduinoBoardDuemila…'

2010-04-04T04:04:43Z

Created page with '{{na_header}} Availability of parts forced a slight change from v1.1.2 to this version: = Part List = * Based on the Arduino [http://arduino.cc/en/Main/ArduinoBoardDuemila…'

Páàjì titun

{{na_header}}

Availability of parts forced a slight change from v1.1.2 to this version:

= Part List =

* Based on the [[Arduino]] [http://arduino.cc/en/Main/ArduinoBoardDuemilanove Duemilanove] using the [http://arduino.cc/en/Main/ArduinoEthernetShield Ethernet Shield] for communication.
* Arduino's digital pins #2-9 set to output through 330Ω resistors to 2x [[LTV-846]] opto-isolators which opens and closes a given node's reset switch. Supports up to 8 nodes at the moment.
* [[74HC540E]] 8-Input Inverter for the status LEDs.
* [[1N4148]] diodes prevent improper connection of the reset connectors by providing a closed circuit when the reset switch's +5vcc is connected to the ground pin.
* 8x green and 8x red low-power LEDs are are paired up per circuit to show the status of each port.
* 16x 330Ω resistors. Each Open/Fenced status LED pair's grounds are tied together and connected to ground via a resistor and the Arduino pins going through the optoisolators are tied to ground through a resistor.
* An Arduino [[Proto Shield v.4]] is used to assemble the components onto an Arduino-compatible shield. Given the size restrictions, wire-wrap wire is used to provide connections. It's messy, but it works.

= Diagrams =

== Circuit ==

Per circuit design:
[[Image:na_v1.1.3_circuit_design_b.png|480px|thumb|center|This is the schematic for a given circuit in this design. Credit's to Mark Loit.]]

== Protoshield Board ==

'''Feb. 27, 2010''': The initial proto-board is '''done'''!

[[Image:na_v1.1.3_build_status_20100227_01.jpg|thumb|500px|center|It's alive! Here ports #02 and #05 are fenced.]]

[[Image:na_v1.1.3_build_status_20100227_02.jpg|thumb|500px|center|Same picture, different angle.]]

[[Image:na_v1.1.3_build_status_20100227_03.jpg|thumb|500px|center|The horrible looking, but functioning, underside!]]

I still need to do up proper schematics. I will do that shortly.

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NA v1.1.3 - Revision history

Digimer: Created page with '{{na_header}} Availability of parts forced a slight change from v1.1.2 to this version: = Part List = * Based on the Arduino [http://arduino.cc/en/Main/ArduinoBoardDuemila…'