Biosensors

Quantification of biological or biochemical processes are critical for medical, biological and biotechnological applications. However, the conversion of biological information to an electronic signal to facilitate subsequent processing is a challenge due to the complexity of the connection of an electronic device directly to a biological environment.

Biosensors are attractive devices for analyzing the content of a biological sample due to the direct conversion of a biological event into an electronic signal.

A biosensor consists of a biological recognition element, a transducer and an electronic system. In a complex sample, the biological recognition element is able to discriminate between the various components therein and interact with the compound to be analyzed. Also called analyte. Once produced the interaction the transducer converts the energy produced by this into an electrical signal. Finally the electronic records and processes the signal.

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Connect 1.8″ TFT SPI to Arduino UNO

Test TFT connected to Arduino with the text “Scidle.com”

 If you are thinking of doing a project with Arduino UNO and need to view data without having to show them through a serial or USB port on your computer, you’ll need a small screen or display. Let’s see how to use a TFT 1.8″ by SPI. It is not designed for use with an Arduino UNO so its I/O ports do not work 3.3V but 5V. What it allows is powered at 5V, in fact if we feed it to 3.3V for use with an Arduino Nano or 3V Trinket have to short the JP1 connection to not use the voltage regulator that powers both the TFT as the SD card. In this case we will not use the SD Card, but also works at 3.3V, although explain its use in another entry.

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Google TTS on Ubuntu

If you‘ve ever wanted to install a TTS (Text to Speech) and have not known how, I propose a simple way to use Google TTS on Linux. The most common is to install an addon on your browser, but have the limitation of not being able to use it in a PDF or a text file. This way you can use it regardless of which program you are using just highlighting the text you want to hear and pressing a key combination of your choice.

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Category: Software | Tags: , , , ,

Install GitHub libraries on Arduino IDE

GitHub

GitHub

If you’ve ever been looking for Arduino libraries sure you finished in GitHub. This web repository has thousands of libraries that can be very useful for our projects with Arduino. Let’s see a couple of ways to install a library that is hosted on GitHub. For this example I chose the aJson library.
In the first place we will see how a manual installation would be done, for which we need to download the library in a ZIP clicking the Download ZIP button inside the project page.

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Install Arduino IDE in Ubuntu

Arduino

The easiest and popular way to introducing us to the world of microcontrollers is using Arduino. The great advantage over other development platforms is its simplicity and above all the support you have from your community. The fact that it is an open-source project opens up endless possibilities for customization, as you have access to all design, from electronics to software.

arduino_uno

Arduino UNO

 But Arduino is not only a hardware also need a simple and friendly environment programming for everyone, including those who have never programmed. That environment is Arduino IDE.

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Install Pro Trinket in Ubuntu

Pro Trinket V3

Pro Trinket V3

Following the appearance of Arduino increased the number of open-source hardware devices to develop affordable to the general public. An example is Pro Trinket and Trinket,  that like Arduino has a ATmega328 microcontroller and a bootloader that allows you to load your programs directly to the board via USB. But the outstanding features are its ability to connect directly to a battery from 5v to 15v (in the case of the V3 trinket from 3.5v to 16v) and especially its small size. All this makes it ideal for small projects that run with a battery. We can also load programs through the Arduino IDE and 95% of Arduino programs designed to run on Trinket directly, the rest have to change the settings for some pins or not enough space for storage in other cases.

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Pythagorean theorem

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The origin of the Pythagorean theorem is a mystery, in fact it is not known if it was discovered once or several times in different places. The question is, would it be difficult to deduce? Below you can view an animation with a graphic demonstration of the Pythagorean theorem. You will be surprised what you do not explain it this way before

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Category: Mathematics | Tags: ,