--- crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68
On Sun, Feb 28, 2016 at 7:25 PM, Jakub Kákona <[email protected]> wrote: > Hello all, > > I am coming to this forum trough that page: > https://www.youmagine.com/designs/libre-hardware-licensed-parametric-laptop-design#activity--comment-create--6082 > Thanks very much for this great work! :) > I am interested in EOMA68 project for several years. Althought I am > currently using the ODROID boards in my projects - one example is radio > meteor detection station: > http://wiki.mlab.cz/lib/exe/fetch.php?media=cs:designs:rmds:rmds02d_station.jpg cool. that actually looks really sophisticated, and extremely tidy. > This is a typical candidate of electronic computing device which needs > occasional hardware upgrade or rapid firmware and configuration change.. > Therefore I looking forward for moment when we could integrate the EOMA68 > cpu card in our modular system http://www.mlab.cz/ and after that in to > related designs which already exists. awesome. you probably get the whole concept, then, and are happy with the EOMA68 interfaces, and the idea of using low-cost ECs at around $1.50 to do tasks that are just out of reach of the [simple, straightforward] EOMA68 set. ironic that an entire EC is coming in at a price that's similar to what SPI-based dedicated I/O ICs come in at, but hey. > Therefore you can count on me if there were a group order of EOMA68 cards or > an crowdfunding campaign. great - that's really good to hear. > We have a long term electronics design experience and quite good contacts to > other electronics manufacturers here in the Czech Republic. I would like to > ask if there were some subtask which we could help with? If none, I will > continue to work on related problems such as open-source battery management > and effective solar charging system for portable devices. ok, well actually there is a sub-task that i could do with your help on: i need a 15 watt *single-cell* battery charger / monitor board which is compliant with the USB-OTG Power specification up to 3A @ 5.0V and can be controlled via I2C as to which direction the power goes... *and* can take DC input at the same time. i've found the bq24193, it's the best i could yet find that will do the job. the only thing is, its I2C interface is hard-wired to 1.8v and i need 3.0 to 3.3v, so there will be some level-shifting needed there. it also will need a battery monitor (coulomb counter) - the STC3115 QFN is what i had in mind, but if you have something better please do say so. PCB size needs to be no bigger than 32 x 85mm, 1.5mm thickness, 2 layer *ONLY*, components *ONLY* on one side, no through-hole components or connectors are allowed, and there is a severe [hard] height limit of 5.5mm so the only DC connector i could find which can handle 5A and is within that limit is the PJ-018H-SMT from CUI Inc. also, i really loved the solar panel idea and it turns out that the PJ-018H-SMT has a 3-pin arrangement, so in theory a diode and a solar panel in series between pins 2 and 3 would provide solar power when the DC-jack is disconnected. pin 3 (to which the solar panel would be wired) would be disconnected when the DC jack is in. pin 2 is GND. > But the cooperative development will be the best solution because there are > huge tasks which we need to overcome. Uniform 3D printable laptop is one of > the things which could bring together the open-hardware design community. I > expected it even in case of Novena laptop, but they go to the different > direction focused on performance needed for hacking. i know. i've spoken to bunnie before. he is specifically *not* interested in taking the novena to large volume manufacturing. this laptop is designed as a mass-volume user-serviceable eco-conscious laptop which is continuously repairable and upgradeable, so that it remains out of landfill for the longest possible length of time. l. _______________________________________________ arm-netbook mailing list [email protected] http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook Send large attachments to [email protected]
