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FunCount Frequency Counter
Written by nuxie1   
Sunday, 21 September 2008

This guide shows you how to build a Frequency Counter capable of measuring frequencies from 1Hz to over 2MHz using an ATTiny2313 AVR Microcontroller. The PCB also provides access to the unused microcontroller pins, so that the board can also be used as a general purpose AVR development board with an LCD.



This design is available from www.nuxieshop.com as a complete kit, as well as pre-programmed AVRs and blank PCBs.


Last Updated ( Wednesday, 06 May 2009 )
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FunGen Function Generator
Written by nuxie1   
Sunday, 31 August 2008

At long last, I have finished the redesign of my Function Generator.

A kit is available from Sparkfun Electronics, or blank PCB's from www.nuxieshop.com.

Some of the improvements include:

  • Onboard power regulation with external wall wart supply
  • 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..
Last Updated ( Sunday, 17 January 2010 )
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Crystal Tester
Written by nuxie1   
Friday, 02 March 2007
Apologies for the lack of updates over the last month, I have had a lot on and haven't had time to put up some new stuff. But I have been working on an updated function generator, with a few new features and a cleaner design.

This design is for a simple crystal oscillator tester. When projects that use crystals don't work, it can be caused by a non working crystal. This circuit will let you check and eliminate dead crystals from your own projects.


Last Updated ( Tuesday, 26 August 2008 )
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LED Matrix Information
Written by nuxie1   
Monday, 15 January 2007
If you have ever seen projects involving LED Matrix displays, wanted to know how they work, or how to use them in your own project then this guide is for you. The construction and operation of the LED matrix display will be explained, as well as various ways to control them.
 
Picture courtesy of Sparkfun Electronics
Picture from Sparkfun Electronics
 
Last Updated ( Tuesday, 26 August 2008 )
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Function Generator
Written by nuxie1   
Thursday, 04 January 2007

After aquiring a brand new 20MHz Two Channel Oscilloscope, I felt I needed something to actually use with it.

In this guide I will show you how to build your own Function Generator. Including component selection, designing the circuit, breadboarding, PCB layout, homemade PCB manufacture through to the finished product.

Last Updated ( Thursday, 18 September 2008 )
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Hackaday Competition Entry
Written by nuxie1   
Monday, 18 December 2006
My Hackaday entry is a PIC Microcontroller prototyping board, based on the 28 pin Microchip 18F2x5x USB enabled microcontrollers.
There are three different versions - one through hole DIP and two surface mount SOIC versions.

With the use of the included USB bootloader, the user can easily program the microcontroller in a few seconds via the USB port.

Last Updated ( Wednesday, 15 October 2008 )
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