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4 Jun 2015

The automotive industries are now into electronics applications in which embedded systems are already part of its major components. In this design, it features the Peripheral Sensor Interface 5 (PSI5), which is the most efficient standard interface of sensors and electronic control units in automotive. It supports complete airbag system that includes system power mode control, supplies for squib firing, satellite sensors, and local Electronic Control Unit (ECU) sensors and ECU logic circuits. It has dedicated safing state machine that complements the airbag’s MCU hardware/software safing approach. The system itself is capable of diagnostics and self-protection.

The design is comprised of MCZ33789 Freescale airbag system basis chip that manages the entire airbag partitions and some major components like squib driver IC, SPI communications with MCU, accelerometer sensor, satellite sensors, and dc sensors for monitoring. The squib driver IC supports air bag modules and seat belt retention that functions with accelerometer sensor. The MCU provide the connection of airbag system with the entire electronic applications of the vehicle. The LC filters are provided to ensure frequency range.

The design is used in different airbag system in which it optimizes the capability of providing safety to users. It can be used for further development of safety system in automotive and other vehicle that is prone to crash or collisions. It can help save lives during accidents.

Airbag System Basis Chip (SBC) with PSI5 – [Link]

4 Jun 2015

electronics-hobbiest-1306121638_500_178

BELMONT, Calif.–(BUSINESS WIRE)–A comprehensive study of electronics hobbyists released today found that over 68% of hobbyists believe electronics as a hobby is essential to fueling the American economy. Over 1700 electronics hobbyists participated in the study, the Great American Electronics Hobbyist Census, conducted by electronic component distributor, Jameco Electronics.

In 2014, electronic component shipments in the United States grew to 4.9% according to the Commerce Department—well ahead of the growth of the overall economy. Participants cited component availability and affordability as a driving factor behind future growth in the hobby.

“By all measures, the electronics hobby is booming,” said Greg Harris, Jameco Vice President of Marketing. “Our study found an underlying passion for electronics that builds the kinds of skills that make the American economy strong.” Serious electronics enthusiasts expect growth of the hobby to continue. More than half of the study respondents state they plan to increase the amount of electronics projects they complete over the next five years.

Jameco Electronics Hobbyist Study: Electronics Skills Are Critical to Fueling American Economy – [Link]

11 May 2015

chip

C.H.I.P. is a computer. It’s tiny and easy to use.

C.H.I.P. does computer things. Work in LibreOffice and save your documents to C.H.I.P.’s onboard storage. Surf the web and check your email over wifi. Play games with a bluetooth controller. With dozens of applications and tools preinstalled, C.H.I.P. is ready to do computer things the moment you power it on.

C.H.I.P. is a computer for students, teachers, grandparents, children, artists, makers, hackers, and inventors. Everyone really. C.H.I.P. is a great way to add a computer to your life and the perfect way to power your computer based projects.

CHIP – The World’s First Nine Dollar Computer – [Link]

7 May 2015

 

dog_repeller

When we hear the word “Ultrasonic” we often refer it to bats and dolphins communication. Technically, “Ultrasonic” applies to sound that is anything above the frequencies of audible sound, and includes anything over 20kHz. Frequencies used for medical diagnostic ultrasound scans extend to 10 MHz and beyond. This dog repellent ultrasonic circuit will chase away angry dogs. It comprises of a 555 timer IC, a speaker/piezoelectric and a little ferrite transformer.

The main part of this circuit is a 555 timer IC. A 555 timer IC is an integrated circuit (chip) used in a variety of timer, pulse generation, and oscillator applications. The 555 can be used to provide time delays, as an oscillator, and as a flip-flop element. Derivatives provide up to four timing circuits in one package. You can use the 555 effectively without understanding the function of each pin in detail. Frequently, the 555 is used in astable mode to generate a continuous series of pulses, but you can also use the 555 to make a one-shot or monostable circuit. The 555 can source or sink 200 mA of output current, and is capable of driving wide range of output devices.

To use this circuit adjust 4k7Ω Resistor at resonance frequency of the piezo transducer for maximum amplitude of the repeller ultrasonic sound. At 11 KHz to 22kHz this can reach a value of 10Vpp and the buzzer is a passive one (without generator).

Note: Ultrasonic frequency must be set with a dog nearby.

Component:

4k7Ω Resistor
10uF Capacitor
10nF Capacitor
1k2Ω Resistor
4k7Ω Potentiometer
Piezo
NC Push Button

Dog Repellent Ultrasonic Circuit 2 – [Link]


30 Apr 2015

 

Mosquito_Repeller

This circuit is built to repel mosquito using high frequency sound. The design is comprised of LM555 timer which provides the pulse generation and precision timing. It is also a stable controller capable of monostable or astable operation. The 74HCT4017BQ device is a Johnson decade counter with 10 decoded outputs. It provides the signal to be fed into the 555 timer which is connected to the output piezo speaker. The piezo speaker generates the sound. The Bipolar Junction Transistors(BJT) BC337 and BC327 acts as the amplifier of the output sound. It forms the push-pull amplifier that is more efficient than a single-ended Class A amplifier.

Electronic Mosquito Repeller – [Link]

8 Apr 2015

FN4TP5BI800WCRP.LARGE

by Mach_5 @ instructables.com:

This tutorial brings you from start to finish in constructing your very own smartphone. You will start by 3D printing a case, then soldering printed circuit boards together, assembly, and finally installing a mobile OS onto your phone and using Python to make it yours. You can learn more about this project at hackaday.io/project/5083

Build Your Own Smartphone using Raspberry Pi – [Link]

10 Mar 2015

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PiJuice is the ultimate module for all portable Raspberry Pi projects. Includes many fun maker projects and a solar power version too!

As one of the smallest systems around there’s so many amazing things you could do with the Raspberry Pi if it was self-powered and portable. With PiJuice we want to provide not only the best portable hardware/software solution, but also a set of inspiring and affordable guided projects for fun, learning, and breaking out the Pi into the real world.

For the past year we’ve toiled and sweated over the technical minutiae of PiJuice so you don’t have to.

Features:

  • Onboard 1400 mAh “off the shelf” Lipo battery (with support for larger Lipo Battery up to 5000 mAH+) to last up to 24 hrs + in constant use!
  • Full UPS (Uninterrupted Power Supply) solution.
  • Integrated RTC (Real Time Clock)
  • On board intelligent on/off switch
  • Low power deep-sleep state with wake on interrupt/calendar event
  • Programmable multi-colored RGB led
  • Full power management API available to Raspberry Pi OS with auto shutdown capability when running low on batteries
  • Raspberry Pi HAT compatible layout, with on board EEPROM for easy plug and play operation
  • Low profile design, to fit inside lots of existing Raspberry Pi cases!

PiJuice – A Portable Project Platform For Every Raspberry Pi – [Link]

20 Feb 2015

ISS_above

by Liam Kennedy @ kickstarter.com:

Raspberry Pi gadget lights up when International Space Station is nearby with Live HD video from the ISS now with Wearable LEDs

The original version of the ISS-Above was funded through a successful Kickstarter nearly 1 year ago. Since then more than 800 ISS-Above’s have been installed worldwide.

At the heart of the ISS-Above is the lovable and successful single board computer called a Raspberry Pi. Over 5 million of these little computers have been sold worldwide.

The ISS-Above functionality has been drastically improved since the first Kickstarter with some truly remarkable new features – including the display of live HD video views of the earth directly from cameras on the International Space Station.

ISS Above HD+ with Wearable Bluetooth Low Energy LEDs – [Link]

19 Feb 2015

IMG-20150218-WA0004-2-1024x979

by Francesco Truzzi @ b.truzzi.me:

I needed a small, fast and reliable multi-voltage level translator (mainly for connecting ESP8266 boards to the Arduino, got tired of resistor networks pretty quickly) so I built a breakout board for TI’s LSF0204(D).

Datasheet and info here.

The LSF0204 is a nice little chip. It can translate up to 4 signals to and from the following values:

1.0 V ↔ 1.8/2.5/3.3/5 V.
1.2 V ↔ 1.8/2.5/3.3/5 V.
1.8 V ↔ 2.5/3.3/5 V.
2.5 V ↔ 3.3/5 V.
3.3 V ↔ 5 V.

[via]

LSF0204 breakout board: a bidirectional, multi-voltage level converter – [Link]

13 Feb 2015

The Twin-T narrow-band notch filter has an RC network that look like twin T’s.  An effective attenuation at a given frequency can be obtained with the Twin-T design.  The Q factor for this passive filter design  is about .25; to get a larger Q factor, an active design is necessary.  The Twin-T design works by phase shifting the input 180 degrees out of phase in the legs of the circuit and adding them again at the output to cancel at the desired frequency.

Twin-T Notch Filter – [Link]



 
 
 

 

 

 

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