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5 Sep 2008

This project details how to build a Smart/SIM card reader/writer for experimentation and investigation of SIM & Smart cards. Once the reader design is built, the open source software can be used to read from and write to the card. Together they can be used to backup/restore stored SIM card data, recover deleted SMS’s and phone contacts, examine the last phone numbers dialed, etc.

SIM Reader – [Link]

5 Sep 2008

The FunGen v2 design utilises the Exar 2206 IC to produce Sine, Triangle and Square waves with adjustable frequency. Its features include:

  • Output Waveforms: 5V TTL Square Wave and selectable Sine or Triangle Wave
  • Output Amplitude: Square Wave: 5Vp-p, Sine/Triangle: 0Vp-p to approximately 6Vp-p.
  • Output Frequency: 25Hz to over 250kHz using kit components. Can be modified to 0.01Hz to 1MHz.
  • Voltage Input: 14.5V+ wall wart AC or DC (not included in kit) 2.1mm centre positive connector.

This kit can be purchased from www.nuxieshop.com either as a complete kit, or just the bare PCB.

Some of the improvements include:

  • Onboard power regulation with external wall wart supply
  • 5V TTL Square wave buffered output
  • Sine/Triangle output centred around 0V with buffered virtual ground (important for audio!)
  • Onboard pots for amplitude and frequency adjustment
  • Mode switch to switch between High and Low frequency outputs
  • Much better signal routing to optimise output signal to noise ratio
  • and much more..

FunGen v2 – [Link]

5 Sep 2008

It was always my intention to build two 6T9 vacuum tube amplifiers. For the first one I used a baking pan for the chassis and I was interested to hear just how good these simple single-ended (SE) tube amps could be with just basic components. From the first hour of play I was very impressed with just how musical they are when matched with the right speakers. My second build of this amplifier incorporated a lot of the original parts but this time more attention was paid to the construction and small upgrades to capacitors and the power supply. I also found that the sound could be further improved by converting the kit to operate from Pentode mode to Ultra-Linear (UL) mode. Both amplifiers are Class A.

Ultra-Linear 6T9 DIY Tube Amplifier – [Link]

5 Sep 2008

Tinkerlog writes:

Lately I was playing with my dual color LED matrix from Sparkfun. It is a matrix of 8 by 8 dual color (red and green) LEDs that measures 5 cm by 5 cm. I just had some sprites flickering across the matrix as the magnifying glass of my “third hand” came in the way. I realized, that, if in the right distance, it will project the sprites on the ceiling. Although the projection is not very bright, it works, if the room is dark enough. Disco, here I come.

LED matrix projector – [Link]

5 Sep 2008

Tinkerlog writes:

This is a remake of the fireflies which I did a year ago. I was always fascinated by the emergence of patterns. One I like most is the synchronization of hundreds or thousands of fireflies. First they flash randomly but after some time and influencing each other, they flash in sync.

This circuit simulates fireflies with small microcontrollers. Note that every firefly acts completely autonomously, it is not a preprogrammed pattern. It is a self organizing system.

The NG version uses a small PCB (Printed Circuit Board) and a RGB-LED.

Synchronizing Fireflies – [Link]

5 Sep 2008

On cloud busters Fredbuster created a wonder tutorial for getting started and building your own Zapper. Fredbusters Tutorial in PDF-Based off his design here is how I made my frequency generator. [via]

How to make a Frequency Generator – [Link]





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