2 layers50.8 × 36.8 mm
Pump
jsvana/coffeetron
Arduino sketch to pour a shot of espresso in a Gaggia Classic Pro to a specific weight.
14 partsMIT
2 layers73 × 43.8 mm
Arduino sketch to pour a shot of espresso in a Gaggia Classic Pro to a specific weight.
- Size
- 73 × 43.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 45
- Nets
- 54
- Pads
- 155
- Tracks, vias
- 215, 15
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 28 Feb 2021
- Updated
- 13 Apr 2021
Overview
Head is an open-source printed circuit board by jsvana, from the jsvana/coffeetron repository on GitHub, published under the MIT licence. It is a 2-layer board of 73 × 43.8 mm with 45 parts on 54 nets, routed with 215 tracks and 15 vias.
It is built around the INA126U and IRF540N. Its parts include 15 resistors, 12 capacitors, 10 connectors, 4 ICs and 1 transistor. It belongs with the NXP (LPC, Kinetis, i.MX RT) boards of this library.
Main components
2
INA126U
SOIC-8-18V~-1.35V、1.35V~18V -40℃~+85℃ 0.02% 0.4V/us 1 100uV 10nA 10pA/℃ 2.7V~36V 200uA 30us 35nV/√Hz@1kHz 500nV/℃ 500pA 5V/V~10000V/V 5mA 94dB External resistor gain、Overvoltage protection Single-Ended SOIC-8 Instrumentation Amplifiers ROHSTexas InstrumentsInstrumentation Amplifiers
IRF540N
TO-2201 N-channel 1.35nF 100V 130W 280pF 33A 35mΩ@10V 4V 52nC@10V 85pF N-Channel TO-220 MOSFETs ROHSOSENMOSFETs
README
README.mdcoffeetron - WIP
Arduino sketch to pour a shot of espresso in a Gaggia Classic Pro to a specific weight.
Fun side project. Probably does things wrong, and isn't really useful unless you have the same setup I do. Feel free to use as a reference if you want!
Pump control
License
Parts
45| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 10k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R4, R5, R7, R8, R10, R11 |
| 6 | 1nF | Capacitor_THT:C_Disc_D5.1mm_W3.2mm_P5.00mm | C4, C6, C7, C9, C10, C12 |
| 3 | 0.1uF | Capacitor_THT:C_Disc_D5.1mm_W3.2mm_P5.00mm | C13, C14, C15 |
| 3 | 10nF | Capacitor_THT:C_Disc_D5.1mm_W3.2mm_P5.00mm | C5, C8, C11 |
| 3 | 1M | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R6, R9, R12 |
| 3 | 220 | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R1, R2, R3 |
| 3 | INA126 | Package_DIP:DIP-8_W7.62mm | U3, U4, U5 |
| 3 | MountingHole_Pad | MountingHole:MountingHole_2.5mm_Pad | H2, H3, H4 |
| 2 | 400 | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R14, R15 |
| 1 | 650 | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R13 |
| 1 | Brew_Button | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J4 |
| 1 | DB9_Male | Connector_Dsub:DSUB-9_Male_Horizontal_P2.77x2.84mm_EdgePinOffset4.94mm_Housed_MountingHolesOffset7.48mm | J1 |
| 1 | Display | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J6 |
| 1 | Flush_Button | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J3 |
| 1 | Heater_Active | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J9 |
| 1 | IRF540N | Package_TO_SOT_THT:TO-220-3_Vertical | Q1 |
| 1 | Load_Cell | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J7 |
| 1 | Pump_Active | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J10 |
| 1 | Rotary_Encoder | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J8 |
| 1 | Stats_Button | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J2 |
| 1 | Teensy4.0 | teensy:Teensy40_SMT | U1 |
| 1 | Temp_Ok | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J5 |
Questions
How big is the Head PCB?
It measures 73 × 43.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Head use?
45 parts, built around the INA126U and IRF540N. 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 Head KiCad files?
From the jsvana/coffeetron repository on GitHub, at the commit this page was made from: the board is hardware/head/head.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Head design in my own project?
Its repository publishes it under the MIT 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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