Flexible haptic actuators designed for wearable devices

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Graham Prophet on edn-europe.com talks about a new cooperation between Kemet and Novasentis aim to develop the next generation of haptic actuators that acts as a second skin for devices.

Kemet and Novasentis, developer of haptic and sensory feedback technology for wearable devices, have announced a collaboration to develop next generation Electro-Mechanical Polymer (EMP) film based haptic actuators for wearable devices. Novasentis will provide the core technology and haptic actuator film whereas Kemet will develop the manufacturing process for the final assembly.

Flexible haptic actuators designed for wearable devices – [Link]

Aeroscope – a wireless oscilloscope

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A pair of former engineers from Agilent Technologies are working on a wireless oscilloscope that will connect to an iOS device for its user interface:

The Aeroscope will be a one-channel device where the electronics are in a “pen” form factor. An SMA connector will let you attach mini-grabbers or other probe tips. Analog bandwidth is 100 MHz with 500 Msamples/s sample rate. It should store 10 ksamples of waveform data.

Aeroscope – a wireless oscilloscope – [Link]

Getting Started with Micro Python

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Jacob Beningo has published a tutorial on how to start with Micro Python to build real-time embedded applications.

The first step a developer interested in Micro Python must take before diving into a real-time embedded application is to select a supported development kit or microprocessor. The best place for a developer look for a supported development kit is to check-out the Micro Python Github Board Summary page.

Getting Started with Micro Python – [Link]

IoT HAT for Raspberry Pi: A must-have for Pi Zero

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A Wi-Fi 802.11n + Bluetooth 4.1 (Dual Mode) add-on board for any Pi model with the 40 pins GPIO connector including Pi 2, A+ and B+

It is an add-on board that provides Wi-Fi and Bluetooth connectivity for the Raspberry Pi.

You can use Wi-Fi and Bluetooth USB dongles, however …….

IoT HAT is more affordable

IoT HAT for Raspberry Pi: A must-have for Pi Zero – [Link]

Linear Bench Power Supply

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Matt Godfrey published his linear lab power supply which has adjustable voltage and current limit. Specs: 0-30V, 0-2A, separate 5V output, display of setpoint and output current and voltage:

This project is a simple linear bench power supply with adjustable voltage and current. It is meant to be a learning experience, putting ideas of circuit design, feedback, stability into practice building a complete practical power supply. I have intentionally avoided using a 3 terminal regulator or purpose built chip and instead implemented the feedback for voltage and current using a couple of opamps. The idea is for this to be a practical final product while giving practice implementing some basic circuits.

Linear Bench Power Supply – [Link]

Half Bridge Driver based on IR2104

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This Half-bridge driver based on IR2104 gate driver IC and N channel Dpak MOSFET , The IR2104 is a high voltage, high speed power MOSFET driver with independent high and low side referenced output channels. HVIC and latch immune CMOS technologies enable ruggedized monolithic construction. The logic input is compatible with standard COMOS or LSTTL output, down to 3.3V logic. A gate IR2104 driver is a power amplifier that accepts a low-power input from a controller IC and produces a high-current drive input for the gate of a high-power transistor such as a power MOSFET. In essence, a gate driver consists of a level shifter in combination with an amplifier.

This drive has many application, ranging from DC-DC power supply for high power density and efficiency, This project simplifies the design of control systems for a wide range of motor applications such as home appliances, industrial drives, DC brushed motors , Brushless motors, fans, Tesla Coil driver, Induction coil driver, LED driver, Halogen Lamp driver.

Specifications

  • Load Supply 12 to 36V DC
  • Load Current 10Amps (Peak 20Amps)
  • Logic Supply 12 To 15V DC
  • Input Signals 3.3V to 15V
  • SMD based tiny design
  • Required Single PWM input
  • Shutdown Input
  • Screw Terminals for Load and Load Supply
  • Header Connector for Logic supply and inputs

Half Bridge Driver based on IR2104 – [Link]

How-to use PWM to Generate Analog Voltage in Digital Circuits

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Maurizio @ emcelettronica.com tipped us with his latest article on how to generate analog voltages using a microcontroller.

Many times, designers are faced with the need of generating analogue or analog voltage levels in purely digital circuits. Although the market provides today a very broad range of dedicated digital-to-analogue converters, putting such a device in the schematic has a negative impact on the overall cost of the system.

How-to use PWM to Generate Analog Voltage in Digital Circuits – [Link]

Getting Started with Atmel ATtiny10

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Mahesh @ electronut.in show us how to program these tiny microcontrollers (ATtiny10) with Atmel Studio 7 and make an RGB led to light.

I like Atmel tinyAVRs because they are tiny computers that I can (almost) wrap my head around. The Atmel ATtiny4/5/9/10 are the cheapest in the tinyAVR line, and they come in two packages – SOT23 pictured above, and an even more stupendously small 2mm x 2mm USON package. This article will talk about programming these little chips. Though they may be tiny, they are still quite capable, and the right choice for many projects.

Getting Started with Atmel ATtiny10 – [Link]

Temperature Display with NeoPixel Ring Color

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This is an OLED temperature display based on ATmega328p along with a NeoPixel led ring to display different colors depending on temperature.

This is a small temperature display using a OLED with a NeoPixel Ring around it using MQTT on a ESP8266 and sending data to the on board ATmega328p. It will cycle on a timer though environmental data from other nodes in the house. The LEDs represents the temperature based on color to give an idea of the temperature in the home or apartment I also added a PIR to turn off the LEDs when no one is around since this is designed to run off a LiPo battery. The core is running DomotiGA (Home automation core) and Mosquitto (MQTT broker). Part of this project is exploring the ESP8266 and learning MQTT.

Temperature Display with NeoPixel Ring Color – [Link]

Panelizing and Gerber Generation in Eagle

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Shantam Raj @ hackster.io discuss about how to panelize PCBs and generate Gerbers on Eagle CAD. In this article he shares his experience and common mistake he made in the process.

I have been working with Eagle for quite some time but never really got a PCB manufactured. almost all the time i used the toner transfer method to make homebrew PCBs. But then i took a project in which i had to use SMD components and i could no longer use toner transfer method because of the limits on resolution of the Laser printer.

Panelizing and Gerber Generation in Eagle – [Link]