Arduino Day 2018 in Plovdiv


arduino

Arduino Day is on 12th of May and celebrating at near 500 locations all around the world.

TuxCon and Smarty Kids foundation are participating in this initiative and organize event in Plovdiv in Grand center from 15.00 to 17.30.

The event is free and anyone can participate and learn how to program ESP8266-EVB boards with Arduino and to control servo motors remotely.

The original Arduino map is wrong, so if you want to participate please do not go to Saedinenie but to Plovdiv 🙂

The room has limited seats so we advice you to register in advance. If there are more people interested the organizers are ready to do it again for all these who can’t manage to register on time.

New Product in stock – mini PIR sensor PIR-SB312

pir

PIR-SB312 is small low power PIR sensor with digital output. Very easy to connect to Arduino and OLinuXino linux boards as can be powered from 2.7 to 12V.

It can sense objects from 3-5 meters and  due to it’s small size it’s easy to hide.

Is it hot or not? Contactless preciese Infra Red temperature measurement with Open Source Hardware MOD-IR-TEMP

MOD-IR-TEMP-bb

MOD-IR-TEMP is UEXT module which could be easily connected to all our boards with UEXT connector. It has MLX90614 contactless Infra red thermometer which allow you to measure objects temperature from distance.

MLX90614 has internal temperature sensor which can sense temperature in range -40+125C and Infra red camera which can sense external objects temperature in range -70+380C with resolution 0.02C and is calibrated with precision 0.5C in range 0-50C.

There are two ways to connectMOD-IR-TEMP to other boards – first is to use UEXT connector:

MOD-IR-TEMP-w

MLX90614 works on +3.3V so it’s important if you use Arduino board to make sure it operates at 3.3V or you will damage the sensor.

OLIMEXINO-32U4 has jumper which selects on what voltage it operates 5 or 3.3V you must put the jumper in 3.3V.

The sensor is read via I2C, Adafruit has library included in Arduino library manager.

UEXT onOLIMEXINO-32U4 has power enable and to operate D8 pin should be placed in LOW state.

Here is code:

#include <Wire.h>
#include "Adafruit_MLX90614.h"

Adafruit_MLX90614 modIrTemp = Adafruit_MLX90614();

void setup() {
 pinMode(8,OUTPUT);   //the following two lines enable power supply 3.3V on UEXT connector
 digitalWrite(8,LOW); //you do not need them if you use wire jumpers
 modIrTemp.begin(); 
 Serial.begin(115200);
}

void loop() {

Serial.print("Ambient = "); Serial.print(modIrTemp.readAmbientTempC()); 
 Serial.print("*C\tObject = "); Serial.println(modIrTemp.readObjectTempC());

 delay(1000); // can adjust this for faster/slower updates
}

If you use breadboard you should connect MOD-IR-TEMP GND, 3.3V and SDA to D2, SCL to D3. In this case you do not need to set D8 LOW to operate.

MOD-IR-TEMP allow precise temperature measurement from distance, we are doing some experiments to measure PCB reflow temperature from distance and to measure body temperature.

Our experiments show that how good the temperature is measured depend on object surface. Dark objects temperature is measured better than shiny objects.

If you place your hand in the front of the sensor the temperature is measured correctly from distance 0 to about 5 cm, then the measurement start to register lower temperature. Our guess is that the build in optics has limitation, if you want to measure temperature from greater distance you should add proper optics.

 

OLIMEXINO-328 special version of Arduino made for low power battery applications

Screenshot from 2018-01-09 12-21-46

Our friends from IrDroid made evaluation of OLIMEXINO-328 board low power modes and blogged about it.

OLIMEXINO-328 is special version of Arduino made for Industrial applications – It can be powered from 9 to 30VDC. The board has build in LiPo charger and step up convertor so when external power is applied or connected to USB the LiPo battery is charged, if both External power and USB connection is missing the power supply is automatically back up by the LiPo battery and OLIMEXINO-328 keep running from battery.

All components of OLIMEXINO-328 work in temperature range -25+85C.

Low power voltage regulators are used to board can be bring down to few micro Ampers when not active.

What happens with Arduino project?

arduino-logo-circle-thumb

 

Arduino is always pointed as example for successful Open Source Software and Hardware project.

With thousands of contributors and millions of users this project is bespoken leader among microcontroller development.

No one remembers the tools used before Arduino.

There were few attempts to fork it for other platforms like Maple for STM32, Energia for MSP430, MPIDE for PIC32 but they never managed to make enough critical mass outside the main Arduino project and then simply were absorbed in Ardino IDE when it got possibility to merge different processor platforms. That was the end of all forks.

All this amazing progress would not be possible without Arduino being Open Source and the help of the thousands contributors.

With the success came the money and as always they were subject to disputes and all we know for the battles inside the Arduino team in the court.

Last year the problems have seemed to be resolved and Arduino Foundation was created and this was announcement as “new beginning”, but meantime some bothersome things were noticed by Open Source community.

All hardware projects listed on arduino.org are announced to be open source hardware, but none of them comply with OSHW definition. The sources are with status “coming soon” years after their release, or where these sources are available there are hidden black boxes which actually spoil the whole idea to allow other people to study, modify, improve and reproduce the design.

Makezine has published article this month with some bothersome facts about Federico Musto who seems to own major shares in the new formed Arduino foundation.

Wired also published article on this issue https://www.wired.com/2017/04/arduinos-new-ceo-federico-musto-may-fabricated-academic-record/

Meantime Philip Torone from Adafruit posted message on OSHW mailing list with list of boards on Arduino.org with problems in OSHW compliance

So many people now ask themselves the question: Is Arduino project hijacked and turn in to Closed Source Project and how this will affect the Arduino community in future?

New Robot Chassis in stock: ROBOT-2WD-KIT2

ROBOT-2WD2-6

We have new Robot Chassis in stock! It’s with two gear motors, two aluminum plates, free castor wheel, two 60 mm wheels attached to the motors, all necessary fittings.

The assembly is very simple:

The castor wheel is attached to bottom plate:

ROBOT-2WD2-2

ROBOT-2WD2-1

To the gear motor is attached small aluminum plate:

ROBOT-2WD2-3

then the 60 mm wheel:

ROBOT-2WD2-4

Four heximal spacers are assembled to the plate with the castor wheel:

ROBOT-2WD2-5

Then the two gear motors aluminum plates are fixed between upper and bottom plate:

ROBOT-2WD2-6

and the chassis is ready!

Now we are thinking for possible custom control board with these features:

  • Arduino like main board allowing easy re-programming
  • Motor drivers
  • Motor encoders which to give feed back to Arduino with photo interrupters
  • LiPo Battery charger and step up converter for motor and Arduino powering
  • UEXT for ESP8266 WiFi
  • two sockets for Ultrasonic distance sensors on the two sides of the castor wheel
  • (optional RT5350F-OLinuXino with camera)
  • connectors for optional servo motors for robot hand
  • UEXT second connector for attaching more sensors

Let us know if we missed something 🙂

New product in stock: Metal Robot chassis with two weels and servo motors

ROBOT-2WD-KIT-1

ROBOT-2WD-KIT is metal chassis for Robot. It comes with two servo motors, 60 mm wheels and one free wheel.

There are provisions to attach sensors and control board.

The Servo motors can be driven with LiPo battery.

Chassis dimensions are 160 x 75 mm.

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