Amiga 1200T

I have uploaded a few pictures of my Amiga 1200T. They arn't very goos though. The Amiga is located in the loft where only limited space and light is avaliable. The photo below shows the system working with a Microvitec 1438S monitor. Unfortunately though, this system isn't very reliable. Last time I used it, the graphics from the VooDoo were rather wierd. But sometimes, it wouldn't work at all. I wonder if there is a bad connection somewhere between the VooDoo and the Amiga. See the rest of the pictures here.

Parallel Port based Analogue to Digital converter
 

To the left is a screenshot of the programme I wrote to monitor up to all seven inputs from a Maxim MAX118 8 bit ADC. The screenshot is showing just Channels 1, 3 and 7 in use.  It can measure voltages from 0V to 5V.  With an LM335 temperature sensor (together with an op-amp interface circuit), temperatures of -20°C to 105°C can be measured.  With an LM35DZ sensor (again, with an op-amp interface circuit), temperatures between 0°C and 100°C can be measured.  The circuit interfaces to a PC with a 'Standard' (unidirectional) parallel port. This means it *should* work on an original IBM PC. However, I was unable to test this. The programme was written in QuickBasic 7 and runs in MS-DOS or Windows 95/98. The circuit diagram shows how the MAX118 is interfaced to the parallel port. The 74LS157 is used to convert the 8 bit output from the ADC into two 4 bit nibbles. I will put some more complete details on the site eventually, but do to accuracy issues I had with the MAX118, I am currently trying to make a similar system, but using the cheaper and slower ADC0808. The ADC0808 should be just as suitable despite its slower speeds, as high speeds are not required for measurements such as temperature. I also hope to try and make interface such a device to the Amiga computer as well as the PC.

21st July 2009 - Power Tower
At LAG13 last Saturday, I got a Power Tower to put my Amiga 1200 in. Well, only the Blizard 1230-IV, Mediator, HD and cards, as the tower already had a motherboard. Pictures and details coming soon. In the meantime, check out the topic about it on the Classicamiga forums and my Flickr page (see below).

Also, we have some new members at the CRT Fan Club :).

2nd July 2009 - I can't really think of a title
I havn't put much on this website. I made a brief update about the convergence problems on my Sony monitor.

I have finished my college project of building an Analogue to Digital converter for the PC's parallel port. I will post some information and pictures of this soon.

I am also going to make a page about getting the VooDoo 3000 graphics card to work on an Amiga 1200 with a Mediator PCI. I expect this was simple for some people, but me and the guys at LAG had a bit of difficulty. It is all working now though. Just got to sort out the sound and network card, and hopefully get it in a tower.

Got a few photos of LAG meetings and of Lincoln which I will put online sometime. In the meantime som lower resolution versions can be found on my Flickr page: http://www.flickr.com/photos/36651585@N04/

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