Wednesday, 20 March 2024

Faema Faemina 1964

 Some pics and initial brew notes  for a New- old 1964 Faema.


This just arrived and I'm so excited to learn how to use this piece of art.


The Faema Faemina is a classic espresso machine that was first introduced 
by the Italian company FAEMA (Fabbrica Apparecchiature Elettromeccaniche e Affini). 


Unlike many commercial espresso machines of the time, the Faemina was designed to be smaller and more suitable for home use, making it a popular choice among coffee enthusiasts. However, it's really heavy. Made of brass, it weighs 11K.
It is a significant piece of espresso culture, representing the transition of espresso machines from commercial settings to the home kitchen.



The machine operates with a manual spring-lever system, 
allowing users to control the extraction pressure and time. 

 


She has a single boiler system, designed to heat water for both brewing and steaming milk.
Uses a 51mm basket ... similar to a post mil La Pavoni (though the portafilters aren't interchangeable).





























Side on view

















The spring, through the sight glass.
Very cool.

The spring, gives this machine more consistency over a purely manual lever machine like the Europiccola.

I like that I can step away briefly with a spring load machine during a pull vs fully manual Europiccola.











inside - heating elements
There are 2 - one for 200W, the second for 800W.












This is the water entrance point from the boiler , into the grouphead.












First Pull .... will need practice.
The Faemina operates on the hotter side, and so can be a bit more challenging with darker roasts, 
and if you're pulling multiple shots.


The on/off switch. 
This is the On position on my model.
I think on most models, red is on. ?



Overheating on faemina is not an issue if you calibrate and attach a pressurestat (easy to do by hooking up pressure gauge on steam wand) and then make use of the 200W element.

The Faemina needs a special tool for spring changing but most parts are available for it. You cannot leave the Faemina on as long as it has no p-stat.
Instead it constantly emits steam from the pressure relief valve. 
Pressure is maintained but it slowly loses water. 
This is why there is a high-low switch,...
.... the high is for heating up the machine and low is for just keeping the machine up to pressure.

So you can control the temp by adjusting the settable pressure release valve to desired pressure and then practicing when to cycle low / high or turn off / on machine. 
This adjustable pressure regulator.
It consists o f a ballbearing, spring & adjustable screw.
The further in you insert the screw, the higher the pressure will be reached before the valve opens.
Having a temp strip or electronic group temp device greatly aids here.

The machine is I think very temp stable once the desired temp is achieved due to the great mass of the brass group and boiler.  
I do occasionally retard the pull on second or third pulls on the Faemina by adding tension to lever.


Brew notes:
I boil the water with the switch set to the MAX position.
(Takes about 6-7 mins with the switch set to high, or about 20 mins if its low)
When the OPV located on the lid begins to exit steam, put the switch to the MIN position .
Usually I pull shots with the high element off.
This helps to prevent overheating of the group, esp if you are pulling multiple shots.
I aim to get the group head to about 80-85C.
(use a temp strip or electric thermometer).

Tamp then use a puck-screen or aeropress filter paper.
(The Faemina has a viscous flow rate... the water really gushes out)
15g in, about 35g out.
10-20 sec  pre-infusion.
Double pull takes about 45 secs.

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This morning I let it heat to 82C (boiler temp) at the MAX switch position.
At about 80-85C the spring OPV kicks into action and Faemina starts to whistle. 
Then I switched to MIN (which settles the valve) and let the Faemina coast up to 90C . 
at which point I pulled a shot .
15g in, 30 out. 10 sec preinfusion, 35 sec total.

I'll play around with more variations. 
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I'm enjoying the coffee and it seems to be getting better as I stumble forward.


pressure profile 
An old machine ... 5 bar max pressure








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Thursday, 14 March 2024

Arrarex - Caravel, VAM - Lever Espresso Machine

 The caravel, a light sailing ship of the 15th, 16th, and 17th centuries in Europe, much-used by the Spanish and Portuguese for long voyages. 



Apparently developed by the Portuguese for exploring the coast of Africa, the caravel's chief excellence lay in its capacity for sailing to windward.

This is the emblem for the Arrarex Caravel lever coffee machine.

Mine is a V1.0 from the early 1960's.

They're wonderfully simple machines, and the disassembly and reassembly process is a joy. The basic components are a heating element/ boiler, a group, and a piston which is driven with a lever (and your biceps).

Tamper Diameter: 42mm

This machine's piston is totally manual (no spring) such as you will find in a La Pavoni Europiccola

Links



























A masterpiece of design.
I love collecting these old Italian coffee machines.
They look great, and give me such pleasure every morning.


This machine was the first with temperature control.
The thermotat at the rear really pushed the boundaries of home espresso.
...

..

The elegance of the tamper .
Tamper Diameter: 42mm



This machine does not have a closed, pressurized boiler.
It's often referred to as a open boiler.
It's basically a kettle without a airtight-sealed lid.
This has the advantage of stable temperatures, but they can't produce steam (so no cappuccinos).



Italian 3 prong plug.

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Coffee index. Click here :

Wednesday, 13 March 2024

NLC - LDRama - build notes

 These are my build notes for the nonlinear circuits LDRama module.
tHIS eurorack 28HP light sensor module  was designed upon suggestions from Alex Brunori. 
The idea is to play a video (or skype or whatever is the newest thing) fullscreen on your phone and place the phone on the LDR array. The module will generate CVs in response to what is happening in your video.

I've got a Arduino controlled LED project in the works, and I'd like to see if I can do something interesting with the two.

links
+ BOM

I think this is a pretty neat idea.
It is designed to suit a typical 5x2 inch screen, larger screens work fine tho some info around the edges is lost. Ideally the module will sit flat, if on an angle patch-cords into the top row of jacks hold it up very nicely


You can also patch in an external signal, such as a CV from a sequencer, and process this thru the LDRs.


The BOM suggests using GL12528 LDRs x 48


get the opamps on first.
TL072 x 15


















resistors next.
lots of 1k and 100k




These 8 resistors marked 100k should all be 1k
The RL and 1k should be swapped
2k2 resistors for RL












I'm using a 10R resistor for reverse
voltage protection


The LDRs are larger than the usual
You need 48 x GL12528
on order from ebay

to be continued.....
Part 2:

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Coffee varieties that a potentially good for Italian espresso

This is a starting point for experimenting on how and what to roast with the aim of perfecting an Italian espresso blend.

Italian espresso is all about balance, body, and intensity, and the choice of coffee varieties (both species and cultivars) has a major influence on that.

Let’s break it down systematically:

☕️ 1. The Base: Coffee Species

Italian espresso blends almost always combine Arabica and Robusta beans — each contributes different qualities.

SpeciesWhy it’s usedTypical Ratio
Arabica (Coffea arabica)Brings aroma, sweetness, acidity, and complexity. Notes of chocolate, nuts, fruit.60–90%
Robusta (Coffea canephora)Adds crema, body, caffeine, and bitterness. Also stabilizes extraction and reduces acidity.

10–40%
Italian-style espresso blends (like Lavazza or Illy) often use 80% Arabica / 20% Robusta, though southern Italian blends lean higher on Robusta.

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🌍 2. Ideal Arabica Varieties

For the sweet, chocolatey, and balanced profile prized in traditional espresso, the best Arabicas are:

VarietyOriginWhy it’s good for espresso
BourbonLatin America, East AfricaRound, rich sweetness, chocolate and caramel notes. Great crema and balance.
Caturra / CatuaiLatin AmericaCompact Bourbon descendants with good body and lower acidity — ideal for espresso.
TypicaWidespreadClean, sweet, mild — forms the base of many classic Italian blends.
Catimor / CastilloLatin AmericaDisease-resistant hybrids; produce balanced flavor with good body, often nutty.
PacamaraCentral AmericaBig beans, syrupy body, and intense aroma. Used in high-end blends.

Avoid very high-acid, floral Arabicas (like Gesha or Ethiopian Heirlooms) for classic espresso — they taste too sharp or tea-like when extracted under pressure.

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🌱 3. Ideal Robusta Varieties

High-quality Robustas are essential for crema and body — but only washed or fine Robustas should be used, never the harsh industrial ones.

VarietyOriginWhy it’s good for espresso
Canephora (India Kaapi Royale, Uganda Bugisu)India, UgandaClean, earthy, low-acid, full-bodied. Adds thick crema and caffeine kick.
Congo Robusta / Vietnam Robusta (fine grade)Africa, AsiaAdds punch, bitterness, and crema if well processed.


🔬 4. Why These Varieties Work for Italian Espresso

  1. Low to medium acidity — avoids sourness under 9-bar pressure.

  2. Full body and rich mouthfeel — withstands milk and sugar.

  3. Balanced sweetness and bitterness — espresso should be intense but smooth.

  4. Stable crema — from Robusta oils and CO₂ content.

  5. Roast compatibility — darker roasts emphasize chocolatey, caramelized notes typical of Italian style.


🇮🇹 5. Example Classic Italian Espresso Blend

Example composition:

  • 50% Brazil Santos (Arabica, Bourbon/Catuai) — chocolate, nutty base

  • 30% Colombia Supremo (Arabica, Typica/Caturra) — sweetness and balance

  • 20% India Kaapi Royale (Robusta) — crema, strength, spice


Tuesday, 12 March 2024

Coffee Types ...... & some Italian lessons

 Americano

Combine espresso and hot water. You add hot water to a shot of espresso .
(It's different to a long black where the espresso is added to the hot water).
Flavor profile: Retains the flavor complexity of espresso but is less intense than a straight espresso shot.  

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Cappuccino

A cappuccino is an espresso-based coffee drink traditionally made with equal parts espresso, steamed milk, and thick milk foam. It has a rich, creamy texture and is typically served in a smaller cup than a latte. Variations include using non-dairy milk, cream, or adding toppings like cocoa powder or cinnamon. 

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Cortardo

A cortado is a Spanish-origin drink with a one-to-one ratio of a double shot of espresso and milk (approximately 4 ounces total), resulting in a bolder, stronger espresso flavor.  

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A "doppio" coffee is an Italian term that means "double," and it most commonly refers to a double shot of espresso, made with double the amount of ground coffee and water as a single shot. It yields about 2 ounces (around 60ml) of concentrated, full-bodied coffee, and is considered the standard in many barista competitions. 

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Flat White

A flat white is a coffee drink made with espresso and steamed milk, characterized by a higher coffee-to-milk ratio than a latte and a thin, velvety layer of microfoam on top, rather than a thick layer of foam. It offers a stronger coffee flavor than a latte or cappuccino and is typically served in a smaller cup.
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Galao

Galao is a Portuguese coffee drink made with one part espresso and three parts foamed milk, served in a tall glass. It is a creamy and rich beverage similar to a latte but with a higher milk-to-espresso ratio, and it is a popular breakfast staple in Portugal

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Gocciato

"Gocciato" can refer to an Italian coffee, specifically an espresso with a drop of frothed milk. In the city of Trieste, it refers to an espresso with a small amount of steamed milk foam, sometimes served in a glass. It can also mean "dripped" or "dotted," and is the past participle of the Italian verb gocciare. Additionally, "Gocciato" is the title of a 2025 electronic music track by Adriano Onda. 
Coffee: Gocciato
Description: A simple espresso with a small drop of milk foam on top.
Variations:
Goccia: A drop of milk froth in the center of the coffee.
Goccia in b: A drop of hot frothy milk, served in a small glass.
Context: This type of coffee is a part of the unique coffee culture in cities like Trieste, Italy. 
Language: Gocciato
Meaning: The past participle of the Italian verb gocciare.
English translation: "Dripped" or "dotted". 

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Latte

A latte, or caffè latte, is an espresso-based coffee drink made with one or two shots of espresso, a generous amount of steamed milk, and a thin layer of frothed milk on top. It is known for its creamy texture and milder coffee flavor compared to a cappuccino, which is often topped with chocolate powder and has a more distinct, stronger espresso taste.  
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Long Black

A long black is an Australian coffee drink made by pouring a double shot of espresso over hot water, creating a stronger, more robust flavor than an Americano because the espresso is added last. This method preserves the rich crema on top of the coffee, offering a full-bodied black coffee without milk.
 
Ratio: A common ratio is 3/4 water to 1/4 espresso, but you can adjust this to your preference.
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"Lungo," Italian for "long," is an espresso-based coffee drink made with an extra-long pull through the espresso machine, resulting in a larger and milder coffee than a standard espresso. It is made using more hot water and a longer extraction time, which pulls out more flavor and aromas from the coffee beans. This results in a drink that is roughly the same size as a double espresso but less concentrated. 

Preparation: A lungo is created by using more water to pull the shot than a standard espresso, extending the brewing time.
Volume: A lungo is typically about twice the volume of a single espresso shot, similar to a double espresso, but is less concentrated.

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Macchiato

A macchiato is an espresso-based coffee drink with a "mark" or "stain" of milk, which can be a small splash of foamed or steamed milk. The Italian term "macchiato" translates to "marked" or "stained," referring to the milk's mark on the rich, dark espresso, which adds a hint of creaminess and sweetness. A traditional macchiato is espresso-forward, while a latte macchiato is milk-forward with espresso poured on top.


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Mocha

A mocha is an espresso-based coffee drink with added steamed milk and chocolate, similar to a latte but with a chocolate flavor. It can be made with either chocolate syrup or cocoa powder and is often topped with whipped cream. Mochas can be enjoyed either hot or cold and are known for their rich, indulgent flavor that balances coffee bitterness with chocolate sweetness. 
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Piccolo

A piccolo is an Australian-origin drink made with a single shot of espresso and steamed milk in a 4-ounce glass, creating a smaller, milk-enhanced drink with a balanced coffee flavor. 

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Ristretto

A ristretto is a "short shot" of espresso made with the same amount of ground coffee but half the amount of water, resulting in a highly concentrated, intense, and bold flavor. It is sweeter and more syrupy than a standard espresso, with a rich, full-bodied taste and less bitterness, often preferred by coffee enthusiasts who enjoy a stronger flavor. 

Concentration: A ristretto is more concentrated because it uses less water, typically extracting about 15 to 20 ml compared to a standard espresso's 30 ml.






Monday, 11 March 2024

Coffee

This is my index for all coffee related stuff.
I'm mainly interested in lever espresso machines.


Coffee Machines
+ Gaggia Classic Evo Pro - Modding with arduino - Gaggiuino
   Part 2 Gaggiuino V3 - Build Log Notes - switches, PCB
   Part 5 Gaggiuino - wiring
   Part 6 Gaggiuino boiler & pump removal & first tests
La Pavoni OPV and pressure stat maintenance


Coffee Profiles and Recipes
Londinium profile - good for dark roast beans
Blooming espresso profile - light roast



Dialing in Coffee  - Dose, ratio, Grind size & Time

Roasting beans

+ Coffee growing regions:
    - Australia
    - Costa Rica
    - Ethiopia
    - Ethiopian Sidamo + Guji
    - Guatemala
    - Honduras
    - India
    - Japan
    - Kenya
    - Malaysia
    - Mexico
    - Peru
    - Thailand
    - Timor Leste
    - Uganda
    - Vietnam


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Useful links





Sunday, 10 March 2024

NLC Stochaos - Build notes

These are my build notes for the nonlinear circuits "stochaos" module.
It's a 8hp eurorack.


STOCHAOS...... It's a random rhythm pattern generator or sequencer which produces gates and control voltages 














There are just two inputs ; IN & RST
Everything else is an output


Links


This is a decent sized build using 2 PCBs
Start with the ICs and transistors.

The module uses a lot of cmos
CD4070  x2....... XOR
CD4040 x2  .... clock divider 



CD4040 clock divider's outputs feed the four binary inputs of a CD4028 BCD to Decimal converting chip, creating pseudo-random sequences, depending on different CD4040 outputs feeding different CD4028 BCD inputs.


"The circuit can be easily modified by replacing the two 4070 XOR chips with two 4081 AND chips (or any other 4 channel two input logic chip – OR, NAND, XNOR, NOR). I might Build both versions ....the one-gate-at-a-time version tends to get a much faster clock signal" (Andrew F). 




CD 40175... Quad D-type Flip-Flop















CD 4028....... BCD-to-decimal Decoder






























Resistors

Pink noise level :
*** 1M-10M? x 1 ........................select for pink noise level .
................ im using a 10M

RL (LED resistor)  x 9 ..............select resistor to suit LED
brightness (prob 4k7 to 10k) ..... im using 4.7K



....
power rectifier BAT54GWX


Diodes
LL4148

5mm LED for chaos circuit on top PCB, any
crappy LED is fine but high V-on is
good so a blue one if you have it.

headers to unite the two PCBs





















switch

SPDT - 
on-off-on














Jacks

3mm LEDs x 8 ....Up to you, diffused lens are easier
on the eyes. Square hole = anode 


I always do these last.

You're there


First tests.
The LEDs light up. That's promising.



the input needs a SAW or SQUARE wave 
Sine & Tri waves don't trigger the module very well.

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You can find more NLC builds here.
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