Calcifer
About the Calcifer PCB
Calcifer is an open source PCB design by lowdrant, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 65 × 56 mm, with 32 components from 18 distinct parts.
Other key parts include the MAX31856, CAT24C32 and CPC1125N. By type, the board carries 12 resistors, 6 diodes, 6 capacitors, 4 connectors, 3 ICs and 1 switch.
It belongs with the audio, sensors and dev boards & breakouts designs in this gallery.
From the project
Raspberry Pi Talking Fireplace
to reinitalize Calcifer with the new configuration. Since the config section isn't changing, there's no need to resetup the daemon.
To change configuration sections (e.g. from ADAFRUIT to CALCIHATTER), run
Calcifer program logic is packaged as an object inside a CLI script to run the Calcifer mainloop in a clean, stateful way while also providing a basic testing/characterization interface for thermocouple evaluation and debugging.
Main components on the Calcifer
Calcifer bill of materials (BOM)
32 components, 18 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | MAX31856 | TSSOP-14_4.4x5mm_P0.65mm | U1 |
| 1 | CAT24C32 | SOIC-8_3.9x4.9mm_P1.27mm | U2 |
| 1 | CPC1125N | SOP-4_3.8x4.1mm_P2.54mm | U3 |
| 1 | Screw_Terminal_01x02 | TerminalBlock_Phoenix_MKDS-1,5-2_1x02_P5.00mm_Horizontal | J1 |
| 1 | Jumper | PinHeader_1x02_P2.54mm_Vertical | J2 |
| 1 | PI40HAT | PinSocket_2x20_P2.54mm_Vertical | J3 |
| 1 | Conn_02x06_Odd_Even | PinHeader_2x06_P2.54mm_Vertical | J4 |
| 1 | SW_SPDT | PinHeader_1x03_P2.54mm_Vertical | SW1 |
| 1 | RED | LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D1 |
| 3 | AMBER | LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D2, D5, D6 |
| 2 | GREEN | LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D3, D4 |
| 2 | 10n | C_0603_1608Metric_Pad1.05x0.95mm_HandSolder | C1, C2 |
| 2 | 100n | C_0603_1608Metric_Pad1.05x0.95mm_HandSolder | C3, C6 |
| 2 | 100n, 0603 | C_0603_1608Metric_Pad1.05x0.95mm_HandSolder | C4, C5 |
| 7 | 1k | R_0603_1608Metric_Pad1.05x0.95mm_HandSolder | R1, R2, R3, R4, R5, R8, R9 |
| 2 | 3.9K | R_0603_1608Metric_Pad0.84x1.00mm_HandSolder | R6, R7 |
| 1 | 10k | R_0603_1608Metric_Pad1.05x0.95mm_HandSolder | R10 |
| 2 | 100 | R_0603_1608Metric_Pad1.05x0.95mm_HandSolder | R11, R12 |
Calcifer design files
The KiCad project lives in the lowdrant/calcifer repository on GitHub; these links point at the commit this page was built from.
Calcifer: common questions
How big is the Calcifer PCB?
The Calcifer measures 65 × 56 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Calcifer?
32 components, from 18 distinct parts. The full bill of materials is listed on this page.
Where can I download the Calcifer design files?
From the lowdrant/calcifer repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Calcifer design in my own project?
Yes, under the terms of its GPL-3.0 license, which lowdrant chose for the repository.
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