2 layers124.5 × 99.1 mm
Vetrnik power
ondras12345/vetrnik
Electronics for heating water with power from a 2 kW wind turbine
138 parts
2 layers45.2 × 36.6 mm
KaffeeInterface v1
misteu/RPiCoffee64Modding / hacking of a coffee machine (DeLonghi ECAM 22.110.B Magnifica S) for IoT capabilities
- Size
- 45.2 × 36.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 50
- Nets
- 50
- Pads
- 130
- Tracks, vias
- 290, 5
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 3 Feb 2018
- Updated
- 16 Aug 2025
Overview
KaffeeInterface v1 is an open-source printed circuit board by misteu, from the misteu/RPiCoffee repository on GitHub, published under the BSD-3-Clause licence. It is a 2-layer board of 45.2 × 36.6 mm with 50 parts on 50 nets, routed with 290 tracks and 5 vias.
It is built around the LTV-817 and BC847. Its parts include 24 resistors, 10 connectors, 8 ICs and 8 transistors.
Main components
2
LTV-817
DIP-4-55℃~+110℃ 1 1.2V 100mV@20mA,1mA 200mW 35V 3us 4us 50% 50mA 50mA 5kV 600% 6V DC Phototransistor DIP-4 Transistor, Photovoltaic Output Optoisolators ROHSLite-OnTransistor, Photovoltaic Output Optoisolators
BC847
SOT-231 NPN 100MHz 100mA 100nA 110 200mW 45V 500mV 6V NPN SOT-23 Bipolar (BJT) ROHSShikuesBipolar (BJT)
README
README.mdRPiCoffee aka Coffee as a Service 4 real
Modding / hacking of a coffee machine (DeLonghi ECAM 22.110.B Magnifica S) for IoT capabilities
See github-Page or docs/README.md for working progress: https://misteu.github.io/RPiCoffee/
Here is everything a little bit more detailed: https://github.com/misteu/RPiCoffee/wiki (<-- still a lot of stuff missing, coming soon!)
Parts
50| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | Conn_01x02_Male | Pin_Headers:Pin_Header_Straight_1x02_Pitch2.54mm | J1, J3, J4, J5, J6, J7, J8, J9, J10 |
| 8 | 10k | Resistors_SMD:R_0805_HandSoldering | R1, R2, R3, R4, R13, R14, R15, R16 |
| 8 | 200 | Resistors_SMD:R_0805_HandSoldering | R9, R10, R11, R12, R21, R22, R23, R24 |
| 8 | 5,6k | Resistors_SMD:R_0805_HandSoldering | R5, R6, R7, R8, R17, R18, R19, R20 |
| 8 | BC847 | TO_SOT_Packages_SMD:SOT-23 | Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 |
| 8 | LTV-817 | Housings_DIP:DIP-4_W7.62mm | U1, U2, U3, U4, U5, U6, U7, U8 |
| 1 | Conn_01x08_Male | Pin_Headers:Pin_Header_Straight_1x08_Pitch2.54mm | J2 |
Questions
How big is the KaffeeInterface v1 PCB?
It measures 45.2 × 36.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the KaffeeInterface v1 use?
50 parts, built around the LTV-817 and BC847. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the KaffeeInterface v1 KiCad files?
From the misteu/RPiCoffee repository on GitHub, at the commit this page was made from: the board is schematics_KiCadProject/kaffeeInterface_v1.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the KaffeeInterface v1 design in my own project?
Its repository publishes it under the BSD-3-Clause licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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