The Metal Linux Computer – The first LCD industrial panel prototypes are ready

LCD9

What you see is our first sample of the metal frame for 7″ LCD with build-in A20-OLinuXino-LIME inside!

Our mechanical designer is getting better and better after the design of A20-OLinuXino-MICRO and A20-OLinuXino-LIME boxes. The box for MICRO was done after three attempts, the LIME box was done right from the second attempt, now the LCD box got perfect from the very first attempt!

The metal frame is done by three parts:

LCD1

Here above you see two parts, which connect together with single screw. Why this is necessary – LIME has connectors on both ends and it’s not possible to fit inside as the connectors go outside PCB borders

LCD2

this is the third part it’s bend to hold inside the touch panel and LCD:

LCD3

here is the frame with LCD and touchscreen in it:

LCD4

the LIME is attached to back panel with one screw on metal spacer, the left side connectors show outside a bit:

LCD5

then we attach the right side panel and screw them together:

LCD6

then the LCD part is snap to the other two and fixed with 4 screws:

LCD7

here is how it looks on the back side:

LCD8

the same four mount holes can be used the metal panel to be assembled to other surface there are provisional mount holes on the back side as well.

The whole construction is solid and reliable. The frame dimensions are: 190 x 102 mm the higher back side is 40 mm the lower side is 10 mm thick.

This whole frame have approx same size as MODEL-B box and have just few more bendings so the price I expect is to be same as on MODEL-B box i.e. about EUR 15.00

This means 7″ LCD panel with A20-OLinuXino with the metal frame will cost from EUR 81.00 and if TOUCH screen is add from EUR 89.00

A64-OLinuXino OSHW Linux computer is close to complete routing – GitHub update of KiCAD files

A64

Our first complex Linux board done completely in KiCAD is near the finish.

As you can see from the picture above all the complex high speed signals routing is already done.

What left is GPIO, audio etc low speed signals which are easy to complete.  CAD files are updated to GitHub

A20-OLinuXino-LIME server with 320GB HDD works on LiPo battery over 6 hours

A20-OLinuXino-LIME-1

We have server rack with several x86 servers running Linux with our work file repositories, the ERP and etc.

They are quite power hungry as lot of HDDs are connected to them in RAID mirrors to prevent data loss.

We are located in industrial area and power supply glitches are not uncommon, specially during the winter.

To keep the servers alive during power downs, we had to buy expensive 2000 EUR UPS, which actually keep them no more than 20-30 minutes up when power is down, so basically just to allow you 10-15 minutes to finish your work and then to shut them down properly before the battery is drained.

This UPS has lead-acid batteries inside which has to be changed every 3 years and cost almost as much as the UPS itself.

Initially we kept our all Olinuxino Linux images on Gdrive, but there were few issues with this, the images grew to many Gigabytes, and Gdrive start to restrict the access to the files after some limits were reach, so we decided to host these images by us on torrent. We decided to make separate server for this due to security reasons, we just wanted to keep our local network private and to allow external access only to this isolated server which we access also from outside like other users.

To keep it as low power as possible we setup one A20-LIME + HDD320GB + 6600mAh LiPo battery. This configuration works well several years already.

Yesterday our power supply provider EVN warned us that they will change mains high voltage cables in our area and Olimex will have power supply cut from 9.00 to 15.00, so we had to take day off.

We came today and sure we found all x86 servers down, but to our surprise the LIME with the HDD was working fine all these 6 hours of power blackout and didn’t shut down!

We know that with 6600mAh battery the LIME will last at least 10 hours as it uses 1.5-2W, but the HDD is rated 5W (5V/1A), so we were expecting less time stand alone operation.

It was good surprise to see that actual consumption is less, maybe the HDD enters stand-by mode when not used?

A64-OLinuXino OSHW 64-bit ARM DIY Laptop idea update

10

A64-OLinuXino Laptop idea becomes with better shape, we managed to find supplier for the laptop plastic ABS body with 11.6″, 1366*768 LCD and keyboard where we can embed our A64-OLinuXino motherboard.

7

the body have power supply jack, 2x USB hosts, HDMI, SD card connector, headphones 3.5 mm jack, four speakers,camera, touchpad, power button

1

8

needless to mention this window button will become Tux😀

 

New KiCAD OSHW PCB project – Breakboard for ADS1220 Low Power 24-bit ADC

BB-ADS1220-1

ADS1220 is four channel 24-bit precise Sigma-Delta ADC with these features:

  • Low Current Consumption 120 µA in Duty-Cycle Mode
  • Wide Supply Range: 2.3 V to 5.5 V
  • Programmable Gain: 1 V/V to 128 V/V
  • Programmable Data Rates: Up to 2 kSPS
  • Up to 20-Bits Effective Resolution
  • Simultaneous 50-Hz and 60-Hz Rejection at 20 SPS with Single-Cycle Settling Digital Filter
  • Two Differential or Four Single-Ended Inputs
  • Dual Matched Programmable Current Sources: 10 µA to 1.5 mA
  • Internal 2.048-V Reference: 5 ppm/°C (typ) Drift
  • Internal 2% Accurate Oscillator
  • Internal Temperature Sensor: 0.5°C (typ) Accuracy
  • SPI-Compatible Interface (Mode 1)

The PCB is made with KiCAD and files are uploaded on GitHub with Apache 2.0 Licensee.

Software examples how to use BB-ADS1220 with OLIMEXINO-32U4 (Arduino Leonardo) and A20-OLinuXino-MICRO are available as reference.

According to ARM one of the Benefits of using Microcontrollers – no GPL

LOL I’ve not read something so ignorant for years:)
Hello guys! There is no restriction closed source software to run on Linux, it’s other thing if somebody will decide to use such software on this OS where everything is open.

Workshops at Olimex Training Building – 10th of January – Intel vs ARM, IoT and SMT Technology

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2014 is almost gone, New Year is coming and we will start the year with three Workshops on January 10th.

Update your agenda: Starting from 14.00 o’clock on 10th of January in Olimex Training Building there will be three interesting workshops.

First Workshop will be about Intel vs ARM. Minnowboard MAX will be compared to OLinuXino and RK3188-SOM-EVB in terms of productivity, power consumption, Linux support, etc.

Second Workshop will present ESP8266 and RT5350 OSHW boards for IoT applications.

Third Workshop will be about SMT technology, type of components, how to design PCBs for SMT, what is solder paste, how to handle solder paste, how to design stencil for solder paste, how to print solder paste, reflow profiles, how to make profile and how to trouble shoot problems with SMT technology like printing, soldering etc. There will be practical demonstrations and will be shared know-how captured for the 23+ years of experience with electronics manufacturing which cost gold:)

Everyone is invited! This is free event.

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