Theo Verelst Local Diary Page 6

The same holds as for my tripod and other diary pages: nothing on this page may be copied or changed and distributed except that the page as a whole may be printed or otherwise transfered in unchanged form,  mentioning the original URL and global page reference, and that holds for everyone on the globe and beyond, including so called 'christians' and self-appointed 'Secret Services'.

(alt)   Tripod Home   Local
Diary list (Secure)   Tripod Diary List   Previous Diary

Mar 14 2003, 16:14 PM

A photo I put on recently

Working at three things at more or less at the same time.

When that is possible that's not bad.

While I'm working at about three things at the time, excluding writing this page, I though I'd put in a few notes, sort of after I provided a virus check, which after longs months of internet server running still turns out fully negative, which is reassuring.

I've tried a heavy toroid transformer to feed the 'sweet little' portbable high Q amplifier into full serious hifi power, probably in about the 100W range, good fun, that is, I first checked the capacitors for maximum voltage, and then simply fed the AC input with a 6-12 amp, 25 V AC voltage, not regarding the only about .75 mm2 lead and the moderate thick wall wart supply type connector. But it worked wonderfully, lots more stable supply, higher voltage, both good for the amp quality, and of course loads of 'headroom'. Tried several sources, worked fine, I used a heavy heat sink at some point which I placed simply under the small aluminium case right under the amp chips, with the thick part of the sink over the exact places where the chips connect to the aluminum playing disco for a little while proved to not heat the whole machinery even to the boiling point.

The 300 Watt toroids still seem to dim the light when switched on, I found there are special fuses for it.

I made a 16 bit presettable counter/latch/3state output unit pcb, with a single 16 bit connector and LED's at the counter output, which should be good to get a memory prepared for a (fast) Z80 DMA'd full of data from a PC for instance.


Perspective is: connector (matchbox), toroïd transformer, CD circumference, 'bookshelf' speaker

The little ampon top of the heat sink

 On the bottom: the wires from the microprocessor boards getting connected.

Does this all work? In certain ways it is not bad, I'm not at all installing and using all possibilities yet, and currectly focus on imo important subjects, like probably making a good set of pages about making various things, how the is designed and how they work.

Bwise is in the month

A animation which indicates how bwise activates blocks on a row I put on the tcl 'wiki'. I'll make some more pages there, I'm sure.

The flip flop

Is that a dance?

It's an interesting circuit, essential for digital designers, which many maybe self acclaimed computer experts do not know much about or understand, and which would tilt a millions soaking alledgedly 'correct by design' design system I was forced to work with in the past, because it makes the all important link between a funcional unit, that is a (possibly black) block which simply translates its input values in a short, negiligable time to a predefined matching output value, and something which has memory.

Flip Flop circuit made in bwise, the yellow blocks are programmed to act as logical NAND ports.

A flip flop has two stable states, which can exist without error for sustained periods of time, simply because all blocks in the circuit are satisfied with the inputs they receive and stay with their output all the time. There are also 'transitory states' which are transient, they exist just for a while, and then resolve into a stable state.

As a sideremark for now, I made the procs which contain nand circuits automatically, by using another block, which generates ands on request. This is now that generator block was made:

set n 1
newproc "newproc \"set proc\${genproc.n}.q \\\[expr !(\\\${proc\${genproc.n}.a} && \\\${proc\${genproc.n}.b})\\\]\" proc\${genproc.n} {a b} q  ;set genproc.nlast \${genproc.n}" genproc n nlast
The following image shows the result of connecting the generator block with a incrementor block (add one, for indexing), into a circular graph which is run by using the 'funprop' menu on the genproc block, which sets it up for the next invokation, and makes a new procn and function block.Did we just make a (super) class? Not realy, it's just a code generator with well defined parametric results. Which is probably all the better.


Part of the image was a 'overlay' TV image, which might let an overlay window shine through when its in browser. In fact I just found out it doesn't work on this jpeg version. The info windows show what the procedures contain which are block functions for genproc and the incrementor.

Light distribution

The above is an image coming from POV-ray, a graphics package which can be freely downloaded, probably for various platforms, try google or whichever is your favorite search engine.

It is made from nothing but a graphics description in a computer text file, and is rendered by the program which in this case simulates the light coming from the white place on the ceiling, and bouncing of the walls and floor and objects.

Takes quite a while to compute a large image.