Lange Anna - ST Modular

 These are my build notes for the Lange Anna.

 

 

It's 84HP long.

 

Its basically  a mult  for distributing cv and audio...like the one on the Makenoise skiff.

There are 3 channels. 

Each channel has a pot to set polarity.

Each channel has 1 input and 4 outputs.

Each output has LEDs to indicate polarity

If nothing is connected to an input of a particular channel, its outputs will supply either 10V or 5V (there is a switch to set this). 

 

Links:

Some details from the ST modular website:

https://www.st-modular.com/lange%20anna.htm

The BOM is here

https://github.com/Laminim/EURORACK/blob/master/LANGE%20ANNA/BOM_LANGE_ANNA.xls

You can find files for the rest of ST Modular's modules here:

+ Github

 

Most of the parts are pretty standard.

Op-amps :

4X TL072

3 X TL074 

There are 24 SMD LEDs

All 0805 size

* It´s best to use different SMD LED colours per channel,
e.g. circle = white, square = orange, triangle = green

 

I guess this means 8 of each.

I ended up just using 1 colour.

 

 PJ301M-12 jacks    "Thonkiconn"

Vertical mount mono jacks

+ Jacks & Sockets 

 ordered 22pf 0603 smd

0.1 uF / 100nF C3, C4, C6, C7, C9, C10, C11, C12, C13, C15, C16, C17, C18, C19

-----

1N5819HW

voltage protection ?

  Orientation .... I think This is the right way ???

Op-amps 

TL072 & 074

 

resistors - 100k first.

---------------------------------------------------------------------------

still waiting on these two caps

ordered from mouser

667-EEE-FK1V100UR
LANGE ANNA
EEE-FK1V100UR
10uF 35V

 

Toggle switch

Time to solder the LEDs

They are polarised of course.

 

Most often you can not see any of the LED markings.

They are super small. I use a microscope or the zoom function of my mobile phone.

A small notch or dot will usually indicate the cathode side of an led. 

This also goes for markings on a board too.

 

Note, I've read the opposite to this on some sites... so check the supplier data sheets

before soldering

The LED Ive purchased is this:

630-hsml-c170-t0000

This is a screen shot from it's data sheet:

And surprise ---- the notch points to the anode ????

Confusing 

If you look closely, you can see a small dot (top view) indicating the anode (according to the data sheet.

Looking from the bottom, there is a T shaped line with the middle pointing to the anode.

 I thought there must be a mistake with the data sheet.

But as it turned out in this case the dot does point to the anode, 

------------------

10k pots on order ebay

Jacks x 15

PJ301M-12

Too be continued..