Care of CalCo Cutaways, Via this informative article on speaker failure

PR's Tumblrdome
Cosimo Galluzzi

Janaina Medeiros

oozey mess
will byers stan first human second

roma★
he wasn't even looking at me and he found me
d e v o n

tannertan36
I'd rather be in outer space 🛸

titsay
AnasAbdin
Cosmic Funnies
Mike Driver
Sweet Seals For You, Always

★

izzy's playlists!
Lint Roller? I Barely Know Her
i don't do bad sauce passes
NASA

seen from United Kingdom
seen from Italy
seen from United States
seen from Canada

seen from United Kingdom

seen from Germany

seen from United Kingdom

seen from United States
seen from Türkiye

seen from Japan
seen from Netherlands

seen from United Kingdom

seen from Türkiye
seen from United Kingdom

seen from Malaysia

seen from Brazil

seen from Türkiye

seen from Germany
seen from Italy
seen from Australia
@hardwarehacking
Care of CalCo Cutaways, Via this informative article on speaker failure

Anya is live and ready to show you everything. Watch her strip, dance, and perform exclusive shows just for you. Interact in real-time and make your fantasies come true.
Free to watch • No registration required • HD streaming
I've joined this place so I have somehwere to go and not feel so bad about the aluminum swarf all over my apartment. I'll blog with impressions.
First impression, their sign up page redirects to a 500, hopefully not a big deal :D
This is What Happens When You Build a Cube Out of One Way Mirrors http://themindunleashed.org/2014/03/happens-build-cube-one-way-mirrors.html
Minimalist Module for a synth hacker. A small proto board with GND, +12v and -12v rails. It probably needs a dpdt switch, a momentary pushbutton, a 10k pot and a rotary encoder to finish it out... But then I have all these other blanks I can play with.
Try not to lose your lunch! Inspirational builds! [Scroll down for the forum thread]

Anya is live and ready to show you everything. Watch her strip, dance, and perform exclusive shows just for you. Interact in real-time and make your fantasies come true.
Free to watch • No registration required • HD streaming
A decent explanation of the shallowness seen in some (including my) Eurorack enclosure.
Eurorack 101
A gentle introduction to Eurorack modular synth hardware for hardware enthusiasts.
The 19” Rack
A Rack is a place to put components. A common piece of audio racking is called the 19” rack, because the space across the rack in 19 inches wide.
You see these at gigs, dance parties, sound studios, server rooms. All sorts of places. They come in many shapes and sizes. Depth, height and pitch can all vary wildly, but the space between the sides is 19”.
Rack Units
The other specific standard in 19” racks are the mounting holes on the sides. They are laid out at specific heights.
These heights are called ‘units’ or RU or U for short. A device that is 1 unit high is said to be 1U. A device that is 6 units, 6U etc.
The following diagram is in german, so HE = U.
The Eurorack
This is a standard that Doepfer introduced, based off of rack standards from DIN and IEEE. Much of what I cover here is a more gentle introduction than Doepfer’s own.
A Eurorack is designed with the 19” rack in mind. A Eurorack is 3U high. This means that it is 5.25” or 133.35mm high.
Warning: Do not make your module faceplates 5.25” high! You have to account for the “Lip”. The section on modules later has more information.
Now lets insert some Eurorack rails to mount our modules.
The best definition I can find for one set of Eurorack rails is a ‘Row’. Which suits me fine.
A single row is a single 3U enclosure, regardless of whether it’s a Rack mountable enclosure.
For example. Here’s my Pittsburgh Module [48] case (the 48 is it's width, I'll explain later).
This case is 9.5” wide. it’s not designed for a 19” rack. It’s just portable and complies with the other Eurorack dimensions. I keep calling out the “Lip” and I promise I’ll get to that.
Eurorack modules
Now we have a space to put our modules. I hope you’re reading this because you want to make your own modules.
I only bought one module for my synth. An oscillator from Intellijel, I hope to make the rest myself.
Module dimensions
19” racks have variable heights and fixed width, so they standardized the heights as ‘Units’. Conversly, Eurorack has a fixed height and variable widths.
The height of a face plate should be 128.5mm as stated in the Doepfer documentation.
The width of a module is measured in ‘Horizontal Pitch’ or HP for short. 1HP is ⅕” or 5.08mm. Leave a little bit of tolerance for each plate and make them approx 0.3 to 0.4 mm narrower. For example (again from Doepfer’s spec):
Warning: Go buy a metric ruler. If you get these parts engineered for you, make sure the ‘tolerance’ you specify is 0.05 mm or better.
The thickness of a faceplate can be whatever makes you happy. To the best of my knowledge, 2 mm is considered generous.
Depth is a whole other story.
Doepfer modules are up to 105mm deep. My little portable Pittsburgh Synth case? No more than 28mm is going to fit in there (unless it’s away from the backplane components, where you might fit 50mm).
That’s really tight!
Mounting Holes
For more information, including size and position of mounting holes, read the now much referenced Doepfer spec. Just remember to ignore the bus boards - I’ll cover those next.
Electronics - Power Bus.
Eurorack bus boards are not used consistently across all Eurorack synth modules or enclosures. I don’t know why, but to hazard a guess I suspect that it’s cheaper, more flexible and easier to use a ribbon cable backplane
I recommend ignoring the position of headers in the Doepfer spec because:
You can use ribbon cable jumpers in all enclosures.
Most other enclosures use a ribbon cable with well spaced headers.
Let's look at my minimalist synth:
You can see my Dixie OSC on the left, and heaps of room for the synth modules of my own making! The ribbon cable carries the power to your modules.
Above is the bus pinouts for the Eurorack. It uses a common IDC header on the boards, and female to female connectors on the ribbon cable.
WARNING: Not everyone uses keyed IDC headers. Get the orientation right or cry.
WARNING: Pin numbers are not always shown. Look for clear evidence of which way to orient the connectors before powering up!
Actually misorientation guarantees a short on 16 pin headers, so you might be lucky and just lose your power supply. On 10 pin headers you’ll probably be lucky. Surely folks use diodes right, they’re cheap!
Personally, I’d never risk it.
Further Reading
Learning Modular Glossary of Modular Terms
Coming up next time... All about Control Voltages and Gates.
A simple Photoresistor MIDI controller I built with an Arduino. Light levels are mapped to a scale so that you can play something impressive without knowing anything about music.
Heating Controller found somewhere near my office. Probably 18th street between 6th and 5th Avenues.
It won't be a heating controller for long!
Inside the Arturia MiniLab
Why am I showing you this? Because I open everything... have done since i was a child. I believe it's the correct way to learn. Please tinker more, not less.

Anya is live and ready to show you everything. Watch her strip, dance, and perform exclusive shows just for you. Interact in real-time and make your fantasies come true.
Free to watch • No registration required • HD streaming
Mid Life crisis central at Control. Just down the street from me! I fear for my daughter's college fund.