LIME2-SHIELD adds CAN, second SD-card, two UEXT connectors, Audio IN and OUT, breadboard friendly GPIOs to A20-OLinuXino-LIME2 Open Source Hardware Linux computer

A20-OLinuXino-LIME2 is with small compact design, this is why we couldn’t put on it all connectors for the functionality this board offers.

The existing 0.05″ step connectors are OK for cables and shields, but are pain when you want to breadboard something or to attach UEXT module.

This is why we made LIME2-SHIELD open source hardware shield. It has these signals available:

LIME2-SHIELD User manual explains how to prepare your SD-card for booting Linux on A20-OLinuXino-LIME2, then how to setup the board with different scripts and device tree.

Demo codes how to work with GPIO, I2C, SPI, CAN with C, Python and console are included:

New Product in Stock: OLIMEXINO-NANO-GSM shield EURO 23 Quad band GSM/GPRS + Bluetooth/FM radio


OLIMEXINO-NANO-GSM shield is compatible with OLIMEXINO-NANO and adds Quad core GSM/GPRS capability. With this shield you can send and receive SMS, place and take phone calls, connect to http or ftp via GPRS.

In addition to GSM/GPRS module SIM800H also have Bluetooth 3.0+EDR and FM radio, which are also included as capability of this module. The GSM antenna is external for better range and reception, the Bluetooth antenna is printed on the PCB.

This module can be used with any of our other UEXT boards via jumper wires.

OLIMEXINO-NANO-GSM cost EUR 23 in single quantity.

Arduino library and demo code working with OLIMEXINO-NANO is provided.

OLIMEXINO-NANO-GSM shield prototypes works fine


OLIMEXINO-NANO is small 30×30 mm Arduino Leonardo compatible board with microSD-card, UEXT, micro USB and stack-able shields, the available shields for the moment are:

OLIMEXINO-NANO-GSM is new 4 band GSM shield + Classic Bluetooth combo board. It stacks on OLIMEXINO-NANO and add GSM/GPRS capability to it + Classic Bluetooth connectivity.

The shield will be in stock end of the month and will cost EUR 20

A10-OLinuXino-LIME shield templates for Eagle and KiCAD uploaded on GitHub


For these who want to make their own LIME shields we made templates in Eagle and KiCAD which they can use.

Be careful as these are freshly made and still not prototyped by us, all measures are taken the shields to be functional and error free, but these shields are still not prototyped and may contain errors so use on your own risk until we prototype and verify them 🙂

Specially KiCAD is still black magic to us 🙂

EKG measurement during base jump with SHIELD-EKG-EMG and Arduino


This is link to crazy project made with Arduino and our SHIELD-EKG-EMG.


Heart rate jumps from 130 to 180 bpm at the time of the jump, I was expecting the heart to freeze for a bit at the time of the free fall, but there is lot of muscle noise at this time as you instinctively tight all your muscles when you fall.

New Product in stock: Professional ECG 3-WAY cable with snap connection for Gel filled electrodes


ECG-PRO-3-WAY-CABLE is professional ECG cable with snap connector for ECG-GEL-ELECTRODE GEL filled electrodes:


The GEL filled electrodes ensure perfect low resistance skin connection which reduces the noise when capture the bio signals.

Based on the ECG-PRO-3-WAY-CABLE we made new SHIELD-EKG-EMG-PRO cable which can be plug to the popular SHIELD-EKG-EMG and use GEL filled electrodes for better signal / noise ratio.


Amazing project with SHIELD-EKG-EMG

Gustavo Brancante posted on our forum this amazing project
He is controlling mechanical hand with signals received from his own ARM and sensed with our SHIELD-EKG-EMG
The project is open source and Gustavo is looking for collaborators, the code is posted at!topic/inmoov/vI1sG6WvnQc




SHIELD-LOL works with Arduino and Olimexino and allow 14×9 matrix LED display.

You have chance to win this board if you answer today’s Quiz question.

Today at 17.00 o’clock our local Bulgarian time (GMT+3) we will post on Twitter our questions.

You have one hour to reply to our tweet with the correct answer.

At 18.00 o’clock we will count the correct answers and ask to generate random number in range then announce the winner and ship the board by airmail in Monday.

Do not forget at 18.00 o’clock we will post our Weekly Programming Challenge #7, yet another way to challenge your programming skills



OLIMEXINO-STM32 is industrial grade -25+85C low cost Maple clone with capability to work on LiPo battery and including CAN driver.

SHIELD-LOL is Lot-Of-Leds multiplexing LEDs shield with 126 LEDs made in 14×9 matrix.
This shield originally was developed by Jimmie P Rodgers and you can find his original project and Arduino libraries here
When we saw this shield first time we fall in love with it, it was so simple and nice to play with, especially when we saw how Super-Awesome-Sylvia assembed it 🙂
What we didn’t like on the original design was that it uses only 3mm LEDs, so we made another one with 5 mm and 10 mm LEDs.
SHIELD-LOL is offered with SMT LEDs, with 3mm, 5mm, 10mm LEDs and in BLUE, GREEN, RED and WHITE colors.

Getting the Libraries and Examples:

The SHIELD-LOL library for the MAPLE IDE can be downloaded from:

Note: If you have an Arduino board, you can download the LOLDraw library as an addition to the official Arduino SHIELD-LOL library from the OLIMEXINO-328 product page:

Charliplexing.h – Library for controlling the charliplexed led board from Created by Alex Wenger, December 30, 2009. Modified by Matt Mets, May 28, 2010. Released into the public domain. Modified by Olimex to work with the Olimexino STM32 and the Maple IDE

LOLDraw – A library for drawing geometric primitives on the LOLShield (point, line, triangle, rectangle, circle, ellipse)

Installing the Libraries and examples

The libraries work with the OLIMEXINO-STM32 board + the SHIELD-LOL

How to install the libraries:

1) Make sure that the Maple IDE is not running
2) Copy the LoLShield folder to the /libraries folder of your Maple IDE installation folder
3) Start the IDE. The “LoLShield” examples should now appear under File/examples.
4) Include the libarries in your projects as such:
#include “Charliplexing.h”
#include “LOLDraw.h”
#include “Font.h”
#include “Draw.h”


The Charliplexing library uses Timer 2 to refresh the LEDs
There are more notes on timers and the porting process from AVR to ARM in the package README file.

The library includes three examples:

Rectangle animation – uses the LOLDraw library to draw an animated rectangle


CharliHeart – an example from the original Arduino LOLShield library

BasicTest – the basic test example from the original Arduino LOLShield Library



Image this is really BIG LOL shield, in kit form (you will have fun to solder it yourself)

It will work with any Arduino compatible board.

Today at 17.00 o’clock our local Bulgarian time (GMT+2) we will post on Twitter our questions.

You have one hour to reply to our tweet with the correct answer.

At 18.00 o’clock we will count the correct answers and ask to generate random number in range then announce the winner and ship the board by airmail in Monday.

Good Luck!

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