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13 Jan 2011

If you want your programs to run more faster or want to squeeze bigger programs to fit in to MCU here is a solution. [via]

Having been frustrated with many of the inefficiencies of the Arduino core libraries, we have built an alternate set with performance and size in mind. Alastair has given a talk at the Canberra Linux User Group about this library – the slides can be viewed on SlideShare.

Programming Arduino more efficiently – [Link]

13 Jan 2011

The Xprotolab is the first mixed signal oscilloscope with an arbitrary waveform generator in a DIP module. It measures only 1.6″ sq. inches, and can be mounted directly on a breadboard. The Xprotolab can also be used as a development board for the AVR XMEGA microcontroller. The Xprotolab uses an ATXMEGA32A4 microcontroller, it uses the internal ADC with up to 2MS/s and the internal DAC for the arbitrary waveform generator of 1MS/s.

Xprotolab: Small fully featured atxmega32 scope – [Link]

13 Jan 2011

Jer writes:

Recently, I tested the 0832 LED Matrix Board that I purchased from Sure Electronics. Since I have a simple AVR microcontroller breakout board and a PIR sensor that senses motion, I decided to make something fun using the 0832 LED Matrix Board.

Motion Activated Message Display – [Link]

13 Jan 2011

A pair of AD8307 RSSI (Received Signal Strength Indicator) chips are used to produce DC voltages that are proportional to the logarithm of the Forward and Reflected power levels. These DC voltages can then be subtracted in an Op Amp to produce a voltage proportional to SWR which is essentially independent of power level.

SWR Meter – [Link]

13 Jan 2011

This project is using the Adafruit protoshield to build a four-contestant gameshow system. RoysterBot writes:

If you have ever watched a TV quiz show you have probably seen contestants trying to press a button in order to win a chance to answer a question. The contestant’s quick reaction time results in some kind of light and/or sound indicating victory. This is a practical way to choose the next focus of the game’s activity and it adds a bit of excitement to the process. So when the holiday party planning committee decided to have a trivia contest I decided to build a quiz contestant lockout system to add an extra dimension of fun to the festivities. This would help the planning committee’s mission of creating some entertaining activities for the event.

The minimum requirements were to have a system with multiple buttons that contestants press for a chance to answer a question. The first one to press the button would lock out the other contestants. The system would need to have a simple way to quickly identify who pushed their button first. And finally the system would need to be reset for the next round.

Considering the venue of the holiday party (an upscale wine bar) I felt that the contestant buttons would be one of the most important features. They needed to be hefty and able to withstand abuse by hoards of “beverage enhanced” partygoers.

Quiz-O-Tron 3000: Arduino quiz contestant lockout system – [Link]

13 Jan 2011

The history and technology in batteries by Jeri Elsworth. This is part of A – Z electronics series sponsored by adafruit.com

Batteries – A to Z of Electronics… – [Link]

13 Jan 2011

EEWeb is an Electrical Engineering Community for hardware designers with design tools, projects, articles, jobs, events, discussions, and social networking. Check it out.

EEWeb Electrical Engineering Community – [Link]

13 Jan 2011

This is an online electric circuit simulator based on Flash Player 10. Using it you can simulate simple circuits using batteries, lights, resistors, fan etc and use voltmeter, ammeter and ohm meter to measure various values of the circuit. Give it a try on the link below.

Online electric circuit simulator – [Link]

13 Jan 2011

Badwolf writes:

While soldering a connector to it (yet to get the data out) I found out some hidden functions that can be activated with the use of a simple push-button. [via]

The hidden modes are:

  • H – Hold
  • F – Fast Measurement (screen refresh at each change,way faster)
  • H M – Hold the further opened you get (could be useful for a momentum app)

Adding new features on digital caliper – [Link]

13 Jan 2011

All BlinkM-family devices can have their firmware updated. This makes them great for tiny development boards for ATtiny processors. ReflashBlinkM is an application that makes it easy to put back the original firmware or update a BlinkM to the latest firmware.

ReflashBlinkM: Update your BlinkM’s firmware – [Link]





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