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

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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.

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

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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.

We would love to hear your suggestions how to improve our Linux images

Tux

Please let us know your feed back https://www.olimex.com/forum/index.php?topic=3468.0 here or in our forum, let’s discuss what do you miss in our Linux images?

There already was discussion about Debian whishlist and we implemented almost all suggestions we hear in the latest images, now we want to hear your feedback on what do you think is best to add as initial scripting, enabled features etc.

Thanks!

Home Automation with Open Source Hardware ARM Linux board A20-OLinuXino and MOD-IRDA+

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A20-OLinuXino is Open Source Hardware Linux computer. It consumes only 2W of energy but runs Debian Wheezy and basically with it you can do anything you can do with your desktop Linux server/machine.

What makes A20-OLinuXino more flexible than your computer is that it have lot of additional hardware resources which you don’t have on your desktop computer – like GPIO ports, I2C, SPI, UARTs etc.

With the low power of only 2W A20-OLinuXino can run 24/7 consuming less than 1% of what desktop x86 server would take as power consumption.

Another advantage is that with the build-in Lipo charger simple LiPo battery can run the OLinuXino for hours if the mains power supply fail, so no need for expensive server UPS.

This makes OLinuXino perfect choice for home automation board. You can easily attach web camera to USB port and make video surveillance server with backup power supply LiPo battery for instance.

Another nice feature is the UEXT connector which allow different modules easily to be connected to A20-OLinuxino.

Now we will show you what you can do with MOD-IRDA+ module which is IR receiver and transmitter. You can receive and transmit IR remote control commands and thus control other home appliances with IR remote controls like: TVs, Air conditions, Radios, Stereo amplifires, and any other home gadgets with IR remotes.

Combining this to the fact that with OLinuXino you have access to Internet and can drive GPIOs and so on with Web interface makes endless possibilities.

In the video below you can see how you can teach OLinuXino to do things when receive commands by IR remote control and how it can play back captured IR remote control commands:

 

Having all sources you can easily adapt these for your next Home Automation project.

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