Computing stuff tied to the physical world

JeeNodes now with 328

In AVR, Hardware on Aug 31, 2009 at 00:01

Starting now, I will be replacing the ATmega168 by the ATmega328p in all future JeeNode kits:


Twice the memory: 32 Kb flash, 1 Kb EEPROM, and 2 Kb RAM – and twice the creative fun!

  1. Hey, Great, I like it. you have made such different plugins for the jee node, an here are my question , suggestion : Is it possible to made a jeenode with having a clock(DS1307), more memory, Tempsensor (DS18B20), LDR and (two wire) LCD connection on board ? So we do not need to plug , to plug , to plug ? is it possible for you to make a prototype pcb ? because i’m not so firm in making PCB’s like you ! What about a new name like ” jee room node ” ? wouldn’t it be nice to have a node with all equipment on board ? kind regards Thomas

    • It would be nice to have a larger setup ready made – but the big catch is that not everyone would want the same setup. The JeeNode is useful (IMO) because it’s general-purpose. At this point, I decided to use “plugs” for different usage scenarios. What you describe can be handled with a JeeNode, one Room Plug (already described but not ready), and a plug with the RTC on board and an LCD connector – which you can make using one JeePlug prototype board. The result is a compact stick with everything you ask for.

  2. Hi Jee, This is really great news! In addition to Thomas comment I was wondering if you have any plans to add a shield, which can be connected to all available interfaces, like Port 1 to 4, I2C and SP/ISP. I think that way all the ports will be available on the shield for prototyping. What do you think? Cheers, Alex

  3. A daughterboard or “shield” would be a nice idea. It’s very easy to make using standard perforated board with solder islands. Unlike the Arduino, all headers are on the same 0.1″ grid, so it’s essentially a matter of soldering all the headers in the right place.

    I’ll try one out in the next few days. The big question is: what size would you choose for such a daughterboard?

  4. Hi JC, It would be nice to have the size of daughterboard similar to main one (meaning JeeNode). One can always cut it if require ;-) Cheers, Alex

  5. Yes, me to , i agree , same dimension as the jeenode and hooked up to the 4 ports will be also a great idea and solution. the daughterboard could then assembled with the required components as described in my first comment. Thanks, that would be great. We have to think about a nice looking case with battery holder ( 3xAA nimh = 3,6V ) for mouting at the wall ? so then Thomas

  6. Thanks for the comments. I’ll explore some ideas. A same-size-as-JN option would seem a little on the small side to me – you already get almost that effect by using two JeePlugs, one for each pair of ports.

    I’m also exploring battery options. NiMH batteries have a relatively high-self-discharge rate, so I’m looking into a single small cell (maybe with boost converter to 3.3V) with a small solar cell to charge the battery. It all depends on light levels and energy consumption patterns. With sufficient light, sufficiently often, even a coin cell could work. But there are many more ways to do this – stay tuned for a post in the next few days.

    When I have more to report, I’ll post on the discussion forum (see TALK link at top of this page).

  7. The same-size-as-JN option comes only from the desire of having access to I2C and SP/ISP connectors on the same daughterboard, i.e. to other pins of the MCU. Otherwise, JeePlugs are really enough for everything.

    Not sure about solar cells for indoor projects, but boost converter was something I was looking into as well ;-)

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