Re: [Arm-netbook] Open source Allwinner R40 circuit diagrams
--- crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68 On Tue, May 22, 2018 at 9:31 AM, joem wrote: > SK Hynix H5TQ4G83AFR = 512M x 8 > 27 RMB that means EIGHTEEN dollars just in RAM ICs. that's if you > can get hold of them. RAM continues to be a problem to source. >>> >>> >>> >>> I did tell / warn you :) > > > Just heard cryptocurrency mining is going down the tube yyyeah that's unlikely to happen... or, more to the point, whomever you heard it from is likely to be trying to create a "pump-and-dump" social-engineering scam. sell first, scare everyone, then buy low. > and it may just crash memory market with it - so price bubble > may burst by end of year. hooray!! *thinks* GDDR5 is (i believe) what's commonly used in graphics cards you definitely don't want to be using DDR3 or DDR4 for cryptomining platforms with standard GPUs in them. l. ___ arm-netbook mailing list arm-netbook@lists.phcomp.co.uk http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook Send large attachments to arm-netb...@files.phcomp.co.uk
Re: [Arm-netbook] Open source Allwinner R40 circuit diagrams
> SK Hynix H5TQ4G83AFR = 512M x 8 > 27 RMB that means EIGHTEEN dollars just in RAM ICs. that's if you > can get hold of them. RAM continues to be a problem to source. I did tell / warn you :) Just heard cryptocurrency mining is going down the tube and it may just crash memory market with it - so price bubble may burst by end of year. JoeM Twitter - https://twitter.com/HelloHypercube ___ arm-netbook mailing list arm-netbook@lists.phcomp.co.uk http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook Send large attachments to arm-netb...@files.phcomp.co.uk
Re: [Arm-netbook] Open source Allwinner R40 circuit diagrams
On Mon, Apr 16, 2018 at 8:04 PM, joem wrote: > On 2018-04-16 19:39, Luke Kenneth Casson Leighton wrote: > >> On Mon, Apr 16, 2018 at 7:32 PM, joem wrote: is >> ir 4x DDR3 x8? those are getting stupidly hard to get hold of >> however i found a company in taiwan that can make some. >> SK Hynix H5TQ4G83AFR = 512M x 8 > > 27 RMB that means EIGHTEEN dollars just in RAM ICs. that's if you > can get hold of them. > > First get it to boot, then ditch for cheaper RAM - someone selling for > $14 > (probably fake). posssibbllyyy you might get lucky, but have someone actually from china buy them so they have "legal recourse". > Thanks for head up. no problem. >>> I want to add a $1 STduino chip to gain control of the server >>> at pre-boot stage and post-boot so when it goes into an array, >> >> STM8S003 is ridiculously cheap and really awesome. STM32F030 is also >> likewise cheap. > > STM32F103C8T6 or GD32F103C8T6 - has USB so skip having to buy a separate > USB serial oh of course. then STM32F070 / 072 - they're cheaper than the 103. i think l. ___ arm-netbook mailing list arm-netbook@lists.phcomp.co.uk http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook Send large attachments to arm-netb...@files.phcomp.co.uk
Re: [Arm-netbook] Open source Allwinner R40 circuit diagrams
On 2018-04-16 19:39, Luke Kenneth Casson Leighton wrote: > On Mon, Apr 16, 2018 at 7:32 PM, joem wrote: is > ir 4x DDR3 x8? those are getting stupidly hard to get hold of > however i found a company in taiwan that can make some. > SK Hynix H5TQ4G83AFR = 512M x 8 27 RMB that means EIGHTEEN dollars just in RAM ICs. that's if you can get hold of them. First get it to boot, then ditch for cheaper RAM - someone selling for $14 (probably fake). Thanks for head up. >> I want to add a $1 STduino chip to gain control of the server >> at pre-boot stage and post-boot so when it goes into an array, > > STM8S003 is ridiculously cheap and really awesome. STM32F030 is also > likewise cheap. STM32F103C8T6 or GD32F103C8T6 - has USB so skip having to buy a separate USB serial Twitter handle - https://twitter.com/HelloHypercube ___ arm-netbook mailing list arm-netbook@lists.phcomp.co.uk http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook Send large attachments to arm-netb...@files.phcomp.co.uk
Re: [Arm-netbook] Open source Allwinner R40 circuit diagrams
On Mon, Apr 16, 2018 at 7:32 PM, joem wrote: >> is ir 4x DDR3 x8? those are getting stupidly hard to get hold of >> however i found a company in taiwan that can make some. > > SK Hynix H5TQ4G83AFR = 512M x 8 27 RMB that means EIGHTEEN dollars just in RAM ICs. that's if you can get hold of them. > I want to add a $1 STduino chip to gain control of the server > at pre-boot stage and post-boot so when it goes into an array, STM8S003 is ridiculously cheap and really awesome. STM32F030 is also likewise cheap. l. ___ arm-netbook mailing list arm-netbook@lists.phcomp.co.uk http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook Send large attachments to arm-netb...@files.phcomp.co.uk
Re: [Arm-netbook] Open source Allwinner R40 circuit diagrams
> is ir 4x DDR3 x8? those are getting stupidly hard to get hold of > however i found a company in taiwan that can make some. SK Hynix H5TQ4G83AFR = 512M x 8 I think this week layout finish and I send it off to be made. If the RAM cannot be sourced, then get it laid out with new RAM in 'no time' because there is KiCAD drawings available. All these improvements to KiCAD has made it thunderingly fast. A lot of the work actually got done in text editor and spread sheet csv files believe it or not ;) That is because the entire data is in text files instead of binary files. I want to add a $1 STduino chip to gain control of the server at pre-boot stage and post-boot so when it goes into an array, I can talk to the board through RS232 link to the stduino to tell it to reboot the board, or shut it down in a server array without adding any more complexity to the board. I might do that before sending it off to get it made. Adds 1 to 2 days delay because I got all that in KiCAD already :) ___ arm-netbook mailing list arm-netbook@lists.phcomp.co.uk http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook Send large attachments to arm-netb...@files.phcomp.co.uk
Re: [Arm-netbook] Open source Allwinner R40 circuit diagrams
--- crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68 On Mon, Apr 16, 2018 at 6:50 PM, joem wrote: > On 2018-04-13 00:46, Luke Kenneth Casson Leighton wrote: > >> superb. i might point someone i know at these, he may be interested >> to use them. > > You are welcome :) > > Now I customize the design into a new minimalist R40 server board: > https://www.hellosemi.com/KiCAD_Server_Board.html > > This board has 2GB RAM, gbit ethernet, SATA, camera, MIPI display, HDMI, is ir 4x DDR3 x8? those are getting stupidly hard to get hold of however i found a company in taiwan that can make some. l. ___ arm-netbook mailing list arm-netbook@lists.phcomp.co.uk http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook Send large attachments to arm-netb...@files.phcomp.co.uk
Re: [Arm-netbook] Open source Allwinner R40 circuit diagrams
On 2018-04-13 00:46, Luke Kenneth Casson Leighton wrote: > superb. i might point someone i know at these, he may be interested > to use them. You are welcome :) Now I customize the design into a new minimalist R40 server board: https://www.hellosemi.com/KiCAD_Server_Board.html This board has 2GB RAM, gbit ethernet, SATA, camera, MIPI display, HDMI, uSD, 8GB flash, USB OTG, USB 2.0 x 2. Removed are wifi/bluetooth, audio, mic, Pi connector, IR module. The 8GB flash required a lot of rework as the BGA pinouts were incorrect in the original drawing. Also I had duplicate annotation and missing annotations in my previous KiCAD. Added more footprints where they did not exist from KiCAD libraries. All footprints were copied to local relative directory because switching between different PCs is a total pain at this moment with KiCAD. After all that work, the netlist import works without errors, and viewing 3D works without errors :) Anyone can lay it out now. I'm guessing this PCB will come out with a BOM cost less than $20. For some reason Allwinner R40 SATA read seems fast but write is very slw. Anyone know? ___ arm-netbook mailing list arm-netbook@lists.phcomp.co.uk http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook Send large attachments to arm-netb...@files.phcomp.co.uk
Re: [Arm-netbook] Open source Allwinner R40 circuit diagrams
On Fri, Apr 13, 2018 at 12:08 AM, joem wrote: > Now finished footprints for all essential items - Ethernet, SMD version > of SATA, uSD card, DDR, HDMI, AP6212 WIFI, AXP221s PMIC, eMMC, R40 CPU. > With these anyone should be able to lay out their own boards. superb. i might point someone i know at these, he may be interested to use them. l. ___ arm-netbook mailing list arm-netbook@lists.phcomp.co.uk http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook Send large attachments to arm-netb...@files.phcomp.co.uk
Re: [Arm-netbook] Open source Allwinner R40 circuit diagrams
Now finished footprints for all essential items - Ethernet, SMD version of SATA, uSD card, DDR, HDMI, AP6212 WIFI, AXP221s PMIC, eMMC, R40 CPU. With these anyone should be able to lay out their own boards. >> All 11 page KiCAD conversion complete and uploaded. >> Now moving to layout - done up Allwinner R40 BGA and 8GB eMMC BGA >> footprints. >> >> https://hellosemi.com/KiCAD_Linux_Boards.html > > very cool! ___ arm-netbook mailing list arm-netbook@lists.phcomp.co.uk http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook Send large attachments to arm-netb...@files.phcomp.co.uk
Re: [Arm-netbook] Open source Allwinner R40 circuit diagrams
On Thu, Apr 12, 2018 at 12:30 AM, joem wrote: > All 11 page KiCAD conversion complete and uploaded. > Now moving to layout - done up Allwinner R40 BGA and 8GB eMMC BGA > footprints. > > https://hellosemi.com/KiCAD_Linux_Boards.html very cool! ___ arm-netbook mailing list arm-netbook@lists.phcomp.co.uk http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook Send large attachments to arm-netb...@files.phcomp.co.uk
Re: [Arm-netbook] Open source Allwinner R40 circuit diagrams
All 11 page KiCAD conversion complete and uploaded. Now moving to layout - done up Allwinner R40 BGA and 8GB eMMC BGA footprints. https://hellosemi.com/KiCAD_Linux_Boards.html >> Thinking first board will be a minimalist square board with SoC 2GB DRAM >> serial uSD HDMI PMIC SATA USB flash just to get it to boot. > > sounds eminently sensible. ___ arm-netbook mailing list arm-netbook@lists.phcomp.co.uk http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook Send large attachments to arm-netb...@files.phcomp.co.uk
Re: [Arm-netbook] Open source Allwinner R40 circuit diagrams
--- crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68 On Mon, Apr 9, 2018 at 3:34 PM, joem wrote: > 7th page uploaded in KiCAD > > https://hellosemi.com/KiCAD_Linux_Boards.html fantastic! > (Still only find the BPi version so far) > > Thinking first board will be a minimalist square board with SoC 2GB DRAM > serial uSD HDMI PMIC SATA USB flash just to get it to boot. sounds eminently sensible. l. ___ arm-netbook mailing list arm-netbook@lists.phcomp.co.uk http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook Send large attachments to arm-netb...@files.phcomp.co.uk
Re: [Arm-netbook] Open source Allwinner R40 circuit diagrams
7th page uploaded in KiCAD https://hellosemi.com/KiCAD_Linux_Boards.html (Still only find the BPi version so far) Thinking first board will be a minimalist square board with SoC 2GB DRAM serial uSD HDMI PMIC SATA USB flash just to get it to boot. ___ arm-netbook mailing list arm-netbook@lists.phcomp.co.uk http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook Send large attachments to arm-netb...@files.phcomp.co.uk
