General Discussion
A place to discuss electronics, projects & ideas
6Troubleshooting
Need help with something?
1Repairing
Need help repairing something?
1How To's
Share your projects with others
12
- How To'sHELLO GUYS! My name is Dani. I am a mechanical engineer, product designer and espresso lover and I am really glad that I have found this amazing source of knowledge and you guys - you are really doing exceptional work. Since I am not so familiar with all the electrical stuff and micro controllers, this platform is a great value for me and anyone who wants to explore new things with espresso machines. I want to create my own espresso machine - in its core, not to be a new espresso machine, but to fit my needs in our family kitchen. We have two cabinet areas in wall which are not so deep to fit a regular EM. Its only 35cm and 30cm deep. So I was thinking to create an under-counter EM, where the brew-head is on the top, the boilers, water tank etc. is located underneath the counter. Maybe this is of value for some of you, if you have similar ideas, or maybe somebody already did it and can share some lessons learned on the process. Here is a 3D CAD visualization of this one kitchen wall, with integrated cabinets and the idea of the EM in one of them. In best case it would also be the place for the grinder etc. Like an independent EM functional area. Could also be, the EM in one area, the grinder in the right one... Basically I could take "any" EM, disassemble it, re-route the piping and stuff and get it done. Since I have discovered this site and the Smart Coffee Hardware/Software, I can not stop thinking, if this could be made much much nicer, more functional, more luxury, so to say... the display is a great feature, but can it a different one, bigger, with color... somebody mentioned "a touch display", also some tracking of profiles... This would be really great! The display can be part of the EM itself, or place individually above... If I stick to the E61, I wanted it somehow to look "more" up to date, so I was playing with different ideas of a "cover"... Something like this: Or even more simple, like the left visualization: Ideally, the EM group head and the grinder would look the same, it is a nice to have, at its best it will be like an all in solution. Lets see... Here is a detail picture... I will investigate more. Would really love to here your feedback. I am also offering my 3D capabilities and knowledge to help you out if I can...f.e. creating maybe more pleasing enclosure for the display or some other stuff... I don't know, challenge me. I will reach out to @shematix and see if I could be of some help... :-) If you are interested into this project, let me know, I I will keep posting in this post. Rg. DaniLike
- General DiscussionHi! I found this project to be really exciting! Curious about the suitability of using the latest smart coffee gear on an espresso machine with a Rotary pump - any thoughts, experiences or recommendations? Contrary to a vibration pump, Rotary pumps require quite some energy to get started, and therefore might not be suitable for any pressure profiling, unless doing it steplessly, regulating rpms, or...? (It's a 10+ years Rocket Cellini Evoluzione R)Like
- How To'sPurchase a kit from the Schematix Store: Click here Index: Specifications Inputs/Outputs Smart Coffee Software Features Programming and Wiring guides Purchase Sensors and Hardware Bug reporting and suggestions Updates for Smart Coffee PCB dimensions Specifications of the Smart Coffee board: Power in: 100~240VAC On board DC power supply: 5VDC, 2A On board 3.3V power supply: 1A On board, Solid-Sate relays 100~240VAC live outputs: 2x Boiler element (10A) 1x Pump (10A) 2x Programmable relays (usually connected to solenoid valves) (1A) Total combined output current limit from relays: 20A Element 1, and Pump combined max current: 10A Element 2, RLY1, and RL2 combined max current: 10A 7x 5VDC relay control outputs: (used to control external relays for high current loads) 2x Boiler element 1x Pump 4x Programable relays Fuse: 2x 5x20mm, 10A ESP32: Model: 30pin Development Board Quantity required: 2 Purchasing link: https://s.click.aliexpress.com/e/_DFc08KN Inputs/Outputs: • 4/6 wire Load Cell Input • I2C display screen interface • 2x Pressure transducer inputs • 2x Boiler water level detection probes • Brew Switch input • Espresso mode selection input • Reservoir water level detection options: Reservoir touch-sensitive probe (for detecting water) Reservoir float switch (compatible with NO and NC switches) Ultrasonic water level detection • Ultrasonic distance sensor (for measuring water level inside a reservoir tank) • 2x MAX31865 temperature sensors (compatible with 2, 3, and 4 wire probes. PT100 and PT1000 series compatible) • 6x User programable GPIO pins (M1, M2, S1, S2, S3, and PT3) write your own code to make use of these pins to really customize your coffee experience • 7x 5VDC relay control outputs: (used to control external relays for high current loads) • 2x Boiler element • 1x Pump • 4x Programable relays Smart Coffee Software Features: • Single and Dual boiler compatible with a single group head • PID and PWM logic boiler control • Boiler target can be programmed as Temperature or Pressure • Boiler water level probes (used to trigger a refill when required) • Display metric units (kPa, Celsius, grams, mls) or imperial units (PSI, Fahrenheit, Ounces, fluid ounces) • Pre-Infusion cycle for every coffee extraction (3 stages consisting of: Prime the system > Cycle pump on/off > Extract coffee until the programmed amount has been dispensed) • Momentary or latching switch compatible for Brew and Espresso mode switches • Pressure transducer inputs to control/monitor pressure • Programmable pressure safety limits (machines shuts down when safety limits are exceeded) • Thermocouple temperature sensors to monitor any temperature on the machine • Programmable pressure safety limits (machines shuts down when safety limits are exceeded) • Espresso shot output (when espresso mode is activated by the user) Espresso shot timer Espresso shot by weight target (requires loadcell) Espresso shot by volume target (requires flow meter) • Pause boiler refill (pauses a boiler refill if an espresso extraction is currently taking place) • Ultrasonic distance sensor (used for machines with a reservoir tank to measure the water level) • Reservoir empty standby mode (prevents the machine from operating until the reservoir is refilled) Programming and wiring guides: Download the programming guide: click here Download the wiring guide: click here Purchase Sensors and Hardware: ESP32: Model: 30pin Development Board Quantity required: 2 Purchasing link: https://s.click.aliexpress.com/e/_DFc08KN Pressure transducer: Max voltage input from pressure transducer: 5V Recommended signal range: 0.5 to 4.5V Recommended pressure rating: 200 kPa (0.2mPa) (pressure rating should be at minimum 20% higher than your running pressure) Purchasing link: https://s.click.aliexpress.com/e/_DkQsvxd Optional G1/4 to 1/4BSP thread adapter (select type 2): https://s.click.aliexpress.com/e/_DdueKDl Right angle adapter: https://s.click.aliexpress.com/e/_DE8J34X Display screen: Model: OLED SH1107 Interface: I2C Pixels: 128x128 Input power: 5V Purchasing link: https://s.click.aliexpress.com/e/_DlH1C43 Load cell: Weight rating: 1kg Wiring: 4wire Purchasing link: https://s.click.aliexpress.com/e/_DdDwihl 4 Pin pogo connector: Purchasing link: https://s.click.aliexpress.com/e/_DB2fN7N Small size flow meter: Model: USN-HS06P Voltage: 5V Barb Size: 5mm OD Flow range: 30 ~ 150ml/min Purchasing link: https://s.click.aliexpress.com/e/_DCCjQh5 Medium-size flow meter: Model: USN-HS06PS Voltage: 5V Barb size: 7mm OD Flow range: 0.1 ~ 1.5L/min Purchasing link: https://s.click.aliexpress.com/e/_DFVTRbV High-pressure Gicar flow meter: Purchasing link: https://s.click.aliexpress.com/e/_Dlr1vgB Thermocouple: Compatible wiring: 2/3/4 wire Type: PT100 and PT1000 compatible Purchasing link for screw mount type: https://s.click.aliexpress.com/e/_DkV2nuB Purchasing link for threaded mount type: https://s.click.aliexpress.com/e/_DD0nYYx Ultrasonic Distance Sensor: Model: A02YY Output signal: PWM Input: 5V Purchasing link: https://s.click.aliexpress.com/e/_DFYOL3z Switches: Chrome LED lit momentary switch: https://s.click.aliexpress.com/e/_Dd0BleB (can be used for the brew and espresso mode switches) USB panel mount connector: Purchasing link: https://s.click.aliexpress.com/e/_DksmHhh Shielded multi-core cable: 28AWG, 2meter Purchasing link: https://s.click.aliexpress.com/e/_DkdDW87 M3 Brass standoff: These are handy for mounting the PCB Purchasing link: https://s.click.aliexpress.com/e/_Dn3mUKB Bug reporting and suggestions: If you happen to find a bug in the software. Please send an email describing your software configuration, the sensors you are using, and the bug you have encountered to mail@schematix.co.nz Updates for Smart Coffee: Change log and updates: V1.0 Base version published PCB Dimensions: Width: 101mm (3.97") Length: 153mm (6.02") Mounting hole spacing: 145mm (5.7") x 93mm (3.66") Mounting hole size: 3.7mmLike
Please Read
Forum Rules:
You may not post obscene, rude, offensive or threatening comments on the forum.
Do not create a post for the sole purpose of advertising your business OR selling/promoting a product.
Failure to follow the rules Or be a decent human being, may lead to your account being suspended.
The Forum can be joined by anyone & anyone can publish/write a post in the forum.
By using the forum, you acknowledge Schematix is not responsible for what other people post inside the forum.
All information provided on Schematix.co.nz and the forum are intended for educational purposes ONLY.
If you attempt to recreate/replicate anything you’ve seen/read about, you’re doing so at your own risk!