VK5TM


News, Updates and Other Minutiae

I have, for quite a while, provided modified versions of the code for my projects free of charge. However, the cost of webhosting for this site has tripled in the last couple of years and the little I make out of the pcbs I sell goes nowhere near covering this cost.

As of October 2017, I will be asking for a donation in exchange for providing custom modified code for my projects to help keep this site available.

February 2018

Updated Australian Band Plan page with the latest info (under 'Misc' heading).

November 2017

A modification plus software to allow the Simple DDS VFO to be re-calibrated as often as you want without having to re-program the PIC has been added to the Simple DDS VFO page. Simple DDS VFO bug problem fixed. Code uploaded to webpage as version 'c'.

October 2017

There is a bug in the Simple DDS VFO code. See Simple DDS VFO page for the problem and updated code. Included an add-on for the Simple VFO project to indicate which step size has been selected. Simple DDS VFO project updated and software file uploaded. The pushbutton on the encoder is used to change step size (step sizes 10Hz, 1kHz and 10kHz).

September 2017

Noise Canceller kits now available.

July 2017

Updated both the DDS Xtal Substitute and DDS Xtal Substitute Mark 2 projects into one project. The original webpages are available to download as PDF's.

May 2017

New project added - my version of the X-Phase noise canceller. PCB available and a kit of parts to follow soon

Model Railway Electronic Project - Flouro Light Simulator - Under construction - Dec 2017

All the Model Railway Electronic Project web pages are a work in progress at the moment, so they may ramble a bit or be a bit disorganised while I refine the various pages. Most of these projects were done quite some years ago without much documentation, so I'm in the process of documenting them, which may take a little while. In the mean time, what I have is being put up here. Before flouro lighting had instant start circuits, they would flicker several times before coming on (but there was always at least one that just kept flickering). So here is a small project to simulate just that, with 8 outputs that will flicker several times and then stay on and one output that continually flickers. It can be used for street lights, office lights or just general lighting.

Flouro simulator schematic Click pic (above) for a larger image - opens in a new window. Connecting either globes or LED's: Connecting globes or LED's Various external methods that can be used to control the circuit: Various methods of circuit control Or as simple as toggle switch: Toggle switch control

To do: Expand this webpage with more info. Make a small diorama and video it to show how it operates. More as I think of it.