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SAIA PCDII

Disclaimer: This posting is a work in progress. I’ve mode this some years ago and was asked to provide some documentation:

I have parts of a SAIA PCDII that I wanted to make use out of. The ourput boards have 6 relais each and 8 of them are connected to a backplane connector. This makes 48 mains voltage (low current) switchable channels.
Confusing what I mean? Have a look at this video

I’ve found some of the pictures I took while working on this and just a few days ago I found the box with the hardware itself.

For now the old pictures.

One of the output modules
I desoldered the ICs to work out the schematic
detailed picture of the output board sans ICs
Eight output boards in the extension case

 

Unfortunately I just this one picture of the pin out.

out of focus and confusing pin out – sorry

Links

Manual
Arduino sketch

TODO:

  • redraw schematic
  • Figure out connector type
  • sketch pinout of PCD2.A220 board
  • sketch pinout backplane
  • comment ino file

Manfrotto 323 vs. ebay clone


I got both a genuine Manfrotto 323 and the 12$ ebay clone and took some pictures for you to compare. The Manfrotto one looks more valuable. The release lever of the clone is a bit loose bit holds the plates in very well. The Manfrotto plates fit the clone very well too.

I think the clone is good enough for what I’m doing with it so I will stick with it.

Continue reading Manfrotto 323 vs. ebay clone

Instagram

As some may have noticed I don’t post often here. Writing here takes time because I want postings here to be a bit more elaborate.
That’s also the reason why it’s been silent here for much of the last year. There is more to come but this takes time
If you want to keep up with my shenanigans in the mean time I would like to point you to my Instagram account where I post more and on a regular basis.

greetings, Chris

Electronic viewfinder (EVF)

(This is the English language version of this posting: EVF)
What is this all about? Many old video camera (VHS era) are equipped with tiny black and white CRT screens as viewfinders. It is exactly these this posting is about. Many of them can be hooked up to a BAS or FBAS (Yellow RCA connector). Such as CCTV cameras or a Raspberry Pi to be used as a tiny screen or with the magnifying viewfinder assembly you can put it close to your eye and have a much larger image.

O_sucher_view_detail2 Continue reading Electronic viewfinder (EVF)

Another Infrared comparison

I made another Infrared vs. RGB comparison but this time with different wavelength Infrared-cut filters.

I took this pictures on 14th Nov. 2015 at the Alte Donau subway station in Vienna/Austria.

You can click the knob (< >) and move the slider. By clicking the buttons you can load different wavelength images and their description texts to compare.
Open in new Window/Tab

EV calculated usind this Calculator

 

Backing paper of some rolls of 120-type film

Some times when I load a roll of 120 type film into a camera I’m not sure what the numbers on the backing paper look like. Do the lines I see in the peephole on the back of my cameras represent a “1” or are they just some mark on the backing paper and I have to wind a little bit further?
Wouldn’t it be nice to see what these numbers are supposed to look like?
Well, if you had this problem in the past, looking for an answer right now or just for any reason want to see what the backing paper of 120-type of film looks like here you go!

Continue reading Backing paper of some rolls of 120-type film