The Long anticipated RT5350F-OLinuXino is finally in stock and we have some more good news


RT5350F-OLinuXino development started loooooong time ago, we made the hardware very quickly and hit the wall with the software :)

The Hardware had two revisions, we knew that this IC is overheating and need external DCDC power regulator to release it from the heat, but we first decided to try how bad is it with the chip steps down the 5V to 1.2V with internal LDO, well…. the chip was easily rising to 60C at room temperature 20C, so we made revision.B where we add external DCDC and the temperature of the chip cool down to 40C, so far so good.

The next obstracle was WIFI tuning, Ralink have bunch of registers which are not described in the ‘datasheet’ but you have to know what do with them if you want to tune your WIFI to work correctly.

OpenWRT wisely skips this area of memory as each module vendor is responsible to write the optimal info for the chip in these. It took us about year to figure out what to write in these registers, including obtaining NDA info about the chip features.

The result is good, the chip makes link from up to 20 meters when in house and up to 50-60 meters in open air which is about the maximum of this small PCB printed antenna.

RT5350F-OLinuXino is now in stock and cost EUR 15 in single quantity.

We didn’t stop here, we made also EVB with two relays, button, RT5350F-OLinuXino socket, UEXT connector, USB host, two 100MB Ethernet ports and EXT connector with all unused ports.



The RT5350F-OLinuXin-EVB is also in stock and cost EUR 24 including RT5350F-OLinuXino in it.

Then we decided to make new version with just one Ethernet and LED display in DIN enclosure:


you can see it here how it looks in plastic box:


RT5350F-OLinuXino-DIN is still not complete but will be in stock soon (hopefully end of June). The price will be about EUR 35. It will be nice solution for home automation, serving array of ESP8266 sensors and BLE modules as OpenWRT supports 6LoWPAN.


A33-OLinuXino Open Source Hardware Linux SBC with Quad Core Cortex-A7 ARM processor running at 1.5Ghz


While we stopped the work on A31, we decided that A33 is promising device as it have Mali video and there is chance to have open source drivers and Linux support with hardware acceleration.

A33-OLinuXino is OSHW project and you can see the preliminary files at GitHub.

With size of 70×76 mm it’s small SOM like board, you can see the component arrangement above:

There are two 40 pin 0.1″ connectors: upped for LCD connector, lower for GPIOs, I2C, SPI, etc

A33-OLinuXino have PMU AXP223, A33 Quad core Cortex A7 running at 1.5Ghz, 4/8GB NAND Flash, 1GB RAM

On the left side you can see USB-OTG, LiPo battery connector, debug UART, button, micro SD card on the bottom

On the right side there are Audio IN and OUT connectors and flat cable connector with MIPI and CSI signals.

We still have no idea what it will cost when released as we don’t know how many layers will be the PCB, but we guess it will be in the LIME range i.e. about EUR 30

A31-SOM update


About year ago we posted on this blog about our work on A31 SOM module, a lot of time passed away so we would like to make clear statement about it’s status.

A31 SOM hardware was complete long time ago, but we found lot of bugs in A31 during the software development. Lot of things do not work as expected and the chip have overall poor performance. The video is with PowerVR which means there will be no Linux acceleration forever. All you will got running on it with hardware acceleration is Kernel 3.4 with Android. Memory do not work reliable above 200Mhz clock which is terrible performance. While we have hesitated if we have to put more effort on this chip we got notice from Allwinner that they discontinue A31 and A31s production which ended our hesitation.

A31 has very short life, Tom Cubie shared on IRC before while that Allwinner internally hate this chip with all it’s bugs too :) so I guess Allwinner also got relieve to get rid of it.

Leasons learned, we move forward :)

First Open Source Projects from Bulgarian government


The Bulgarian Government open source the code of some projects paid by the state for very first time.
The open source code is on
This happens with the support of общество.бг (
Why open source is so important for the government projects? Because people will have access to the final code government spends tax money for and all technical knowledge people could have look what exactly is done. Many people could see the source and give feedback improving the security and functionality of the code.

Olimex Summer of Hacking 2015


For third year we will run Summer of Hacking


From June to September 2015.


In Olimex’s new training building.

Who could participate?

  • students;
  • beginners;
  • amateurs;
  • people willing to learn new stuff;
  • we do not have age limitations;

What we do offer?

  • hacker space with fast internet connection;
  • soldering irons;
  • tools for hacking;
  • oscilloscopes;
  • programmers;
  • JTAGs;
  • development boards;
  • laser cutter;
  • DIY 3D printer;
  • access to all boards which Olimex manufacture;
  • mentors who to guide you through your projects;

What we expect from you?

  • basic knowledge for software or hardware;
  • basic english knowledge;
  • willingless to learn and share with others;
  • collaboration with other people;
  • to have your own laptop or computer which to bring to hacker space;

What is the purpose?

  • to learn new stuff;
  • to share with others what you know;
  • to meet interestings people with same interests;
  • to make something interesting together;
  • to do lighting talks on topics you know better than others;

What are the topics?

  • Electronic design;
  • kiCAD PCB layout;
  • Programming embedded devices;
  • Linux kernel and drivers hacking;
  • Python embedded programming;
  • OpenCV experiments;
  • Designing 3d parts to print;
  • Designing parts with laser cutter;
  • Building and programming Robots;
  • interactive toys;
  • crazy projects;

Please submit your interest and the project you want to complete, note that you are not obligated to be here during the all time period. You can come in convenient for you time and leave when you want or upon completion of your project. This is not school, this is place where to learn, share and have fun. The number of seats are limited though, so we have to do some selection.

This is not paid event and is free to all who participate. Olimex does this at good will to help people who want to learn but have no money to buy development boards and tools to check their projects/ideas.

Stencil Printer SD-240 back in stock


Our popular SD-240 Stencil Solder Mask printers are back in stock. They were out of stock for several months as the producer Technoprint closed their SMT machine production.

Fortunately one of their supplier took over the production and restored it. Now we have SD-240 back in stock and SD-300 will be in stock soon too!

OLIMEX Help day

Help Support Advice Assistance and Guidance on a signpost

What is help day?

It’s once per month event (usually at the end of the month) where you can come to our place and get help with using our boards.

Sure you can bring stuff not made by us, and we will try to help with it too, but we are most familiar with our own boards and will be of much more help with them.

If you have project using our boards and something doesn’t work as expected, bring it here and we will do our the best to help you.

Our engineers will be available and you can ask questions and get help from the developers.

Or if you plan something but hesitate how to implement it we may help you to pickup the proper boards/sensors for it.

We do not guarantee that we will solve for minutes every problem you have, but at least we will try.

No e-mails – but good old face to face communication. Unfortunately we can offer this just once per month :)

Our first Help day for May will be on May 30th – Saturday, starting from 14.00 o’clock to not rush the people who will come from outside Plovdiv.

How much does it cost to participate in the Help day? Nothing the event is free (but we will appreciate if you bring with you couple of beers hahaha).

It will be fun and hacking, so join us.

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