Metaboard/2010 activities: Unterschied zwischen den Versionen

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* Board voltage: 3.3V (originally 5V, but 3.3V gives cleaner USB communication and should save power in the sensor units)

* Flashing sensors using serial interface using the [[Metaboard/2010 activities/6-pin auto-detecting programming]]

* Power supply: "18650" (z.B. von [http://www.dealextreme.com dealextreme])

=== Random implementation detail notes ===

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* [http://sense.reox.at/usbbb/prototype/ 2010-10-29]: built first (and working!) version of the usbBB, a USB connector for breadboards which is our first attempt in PCB milling

* [http://sense.reox.at/usbbb/prototypev3/ 2010-11-10]: Prototype v3 (without USB Port and LF33CV because just ordered them)

* [http://sebastian.arttis.net/main.php?g2_itemId=10481 2011-03-15]: Hacking arround with [[HP54645D_Mixed-Signal_Oscilloscope]] and see whats going on at sck, sdi, sdo and irq

* [http://sense.reox.at/rfm12/ 2011-03-20]: WOOOHOOO got something over the air, used mostly code from [http://www.tahina.priv.at/electronics.html#index2h1 here]... also: datasheet gone wrong... port with ANT marking is in real GND, ANT Port is next to it!

* 2011-03-25: If it works at 5V and doesn't at 3.3V, just try adding a startup delay. Hacking on based on [http://jeelabs.net/projects/cafe/repository/show/RF12 jeelabs' RF12 library] now.

== Resources ==

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* [http://www.embedds.com/interfacing-rfm12-transceiver-module/ RFM12 transceiver module]: a board with ATmega8, with the RFM12 completely connected (see [http://comwebnet.co.funpic.de/RFM12/Projekt-RFM12-Tranceiver.pdf schematics])

* [[Benutzer:Mihi/Programming-attiny45-mit-arduino]]: programming arduinos with arduinos

* The vKeyBoard mentioned on [http://pjrc.com/teensy/projects.html the Teensy project page] seems to do exactly the USB-to-USB trick described above, but using two [http://pjrc.com/teensy/ Teensy] boards, which use an ATMega32U4 each. These chips might even provide a way to get the desired functionality in one chip by using vUSB to get a second USB port and optocouplers USB-side, but they are rather difficult to work with unless preassembled in a teensy.

=== Physical resources ===

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** [http://www.mikrocontroller.net/articles/RFM12 RFM12 on mikrocontroller.net]: german description of RFM12 commands

** [http://www.mikrocontroller.net/articles/AVR_RFM12 AVR RFM12 on mikrocontroller.net]

** [http://olek.tk/en/rfm12.php olek.tk's RFM12 tips], including the magical FE reset command

* DMX:

** [http://www.maxim-ic.com/datasheet/index.mvp/id/1111 Maxim RS485 controllers]

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* USB:

** [http://www.beyondlogic.org/usbnutshell/usb1.shtml USB in a NutShell]: a good summary of the USB spec

* 18650 / LiPo charging:

** [http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries battery university on Li-Ion batteries]

* Metalab projects:

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[[Kategorie:Projekte]]

~~[[Kategorie:WhateverLab]]~~

[[Kategorie:Arduino]]