NerO – An Energy Efficient Arduino UNO Compatible Design

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A reference design for an Arduino UNO compatible board based on the FTDI FT231X USB UART, delivers 5V at a full 1A without overheating.

The UNO R3 is the staple of most Arduino based projects but it’s been around for a number of years and many of the features have been improved for example by Adafruit and Sparkfun who make excellent enhanced UNO compatibles. However, our additional requirements for a full 1A current without excess heat dissipation and FCC/CE conformity led us to consider a new 3rd party UNO compatible reference design that met these requirements hence the inspiration behind NerO

NerO – An Energy Efficient Arduino UNO Compatible Design – [Link]

Creator Ci40: The ultimate IoT-in-a-box dev kit

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A complete IoT kit that includes all the hardware, software, and cloud infrastructure needed to quickly build a wireless IoT system.

The Creator™ Ci40 IoT kit includes not only the hardware building blocks needed to quickly prototype a wireless IoT system from scratch but most importantly the open source software frameworks, the network stacks and the cloud connectivity capabilities required to securely connect and authenticate devices to the cloud.

Creator Ci40: The ultimate IoT-in-a-box dev kit – [Link]

LT8714 – 80V/5A synchronous 4-quadrant DC/DC controller

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Linear Technology Corporation announces the LT8714, an 80V input synchronous PWM four quadrant output DC/DC controller. This device cleanly transitions the output voltage through zero volts with up to 5A sourcing and sinking current capability, regardless of the output voltage polarity, making it ideal for regulating to positive, negative, or zero volts. The bipolar output enables the LT8714 to source or sink current, regardless of the output voltage polarity. Applications include bidirectional current sources, test systems, high power low frequency signal amplification, back body biasing, thermoelectric coolers (TECs) and electronic window tinting

LT8714 – 80V/5A synchronous 4-quadrant DC/DC controller – [Link]

 

Arduino Tutorial: Using the Soil Moisture Sensor along with a Nokia 5110 LCD display

Using the soil moisture sensor with an Arduino can’t be easier. Adding a Nokia 5110 LCD display makes things more professional since we can visually check the moisture levels of the soil.

The sensor can measure the levels of moisture in the soil. So it can be extremely useful if you want to monitor the soil moisture of your plants or automate the watering procedure. Let’s see the project we are going to build today. I have one cup in front of me with dry soil. If I place the sensor in the cup we can read a low soil moisture value at the Nokia 5110 display. If I pour some water in the cup you can clearly see that the moisture levels rise. The project is working fine and we can visually check the moisture levels of the soil. Of course this is just a demonstration of the sensor, I am going to build more useful projects in the future with this sensor. Let’s now see how to build this simple project.

Arduino Tutorial: Using the Soil Moisture Sensor along with a Nokia 5110 LCD display – [Link]

Galvanic Skin Response System

The Galvanic Skin Response (GSR) is a property of the skin to exhibit electrical characteristics. It is also known as Electrodermal Activity (EDA), Electrodermal Response (EDR), Electrodermal Level (EDL), Skin Conductance Activity (SCA), Skin Conductance Response (SCR), and a lot more. The GSR utilizes the principle that skin property varies with the state of sweat glands. The electro-physiological signal is generated by the sweat glands, and the sweat is the cause of the variation in resistance and conductivity. The signal can be used for capturing the autonomic nerve responses as a parameter of the sweat gland function.

This reference design is a GSR system that is worn in the wrist. It monitors the user’s skin impedance and temperature. This design features a wellness measurement microcontroller and the TE Connectivity’s micro USB 2.0 that is used as the charging port of this device. The TE micro USB connector is ideal for this application because of its reliability, robustness, and versatility. On the other hand, the microcontroller integrates all the analog front-end and other peripherals required for impedance measurements, including one 16-bit ADC with input MUX and PGA, two 12-bit DACs and two 8-bit DACs, 4 operational amplifiers (OP AMP), 4 uncommitted SPST analog switches, and internal voltage references. This design is powered by LIR2032 rechargeable coin battery. With a mobile device for Android that is free to download, a user can monitor his or her skin resistance and temperature within 20m through the Bluetooth low-energy (BLE) wireless interface.

This reference design is applicable to GSR measurement and other AC impedance measurements. The principle of GSR system is the basis for some significant tools such as electrocardiograph (ECG) and electroencephalograph (EEG). The GSR measurement has a good repeatability. Therefore, it is considered to be a useful tool for examination of the autonomous nervous system function, and especially the peripheral sympathetic system. The GSR devices can be used in medical treatment, lie detection, and wellness monitoring.

Galvanic Skin Response System – [Link]

Designing and Building a binary clock

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Parker Dillmann @ macrofab.com has designed a wrist LED binary clock based on PIC16F527 Microchip mcu.

The Macro Watch stemmed from those constraints. I picked the PIC16F527 microcontroller by Microchip to be the core of the watch because it was the cheapest MCU I could find that had enough I/O and I knew at least a little bit about it in terms of writing code for and programming. The watch shows time in binary since doing so requires less LEDs to display time than the usual watch patterns, driving the cost down.

Designing and Building a binary clock- [Link]

RELATED POSTS

Polyphonic FM Synthesizer with STM32F031

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ihsan Kehribar @ blog.kehribar.me has been working on a MIDI capable, polyphonic FM synthesizer using an 32bit ARM Cortex M0 microcontroller and an audio codec.

Polyphonic FM Synthesizer with STM32F031 – [Link]

Arduino OLED Thermometer And Hygrometer With DHT11

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KonstantinDimitrov @ instructables.com has build a Arduino based OLED Thermometer and Hydrometer using DHT11 sensor.

Hello, everyone ! Today I am going to show you how to make Arduino OLED thermometer and hygrometer* with DHT11.

The OLED we will use today is .96″ inch in size, features 128×64 pixels and uses the SPI Bus.

We will use the u8glib library to communicate with our display. This library has many available parameters(download it and unzip it at /Program Files(x86)/Arduino/Libraries).

Arduino OLED Thermometer And Hygrometer With DHT11 – [Link]

1.2V TO 35V DC-DC CONVERTER

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1.2V to 35V Adjustable DC-DC Converter project has been design around TI’s LM2576-ADJ IC. Inputs supply 40 VDC. LM2576-ADJ is a monolithic integrated circuit that provides all the active functions for step down switching regulator, capable of driving 3A load with excellent line and load regulation.this board has minimum number of components.

Features

  • Output 1.2 to 35 VDC @ 3 A regulated low ripple DC voltage
  • Onboard potentiometer for output voltage adjust
  • Onboard bridge rectifier for AC voltage input
  • LED indication at input
  • Screw Terminal connectors for input and output
  • Four mounting holes of 3.2 mm each
  • PCB dimensions 70 mm x 63 mm

1.2V TO 35V DC-DC CONVERTER – [Link]

transmission: A Creativity Measurement System

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jwitzleben @ instructables.com has build a creativity measurement systems based on Arduino UNO and Flora boards.

It can be too easy to get stuck overthinking your ideas and letting your gears grind without making any progress. As makers, designers, engineers, hobbyists, etc. it is crucial for us to get out of our heads and sketch out our ideas as they come. It takes practice, but ultimately the more we sketch, the more we can create and the better we can share our ideas.

transmission: A Creativity Measurement System  – [Link]