Hvac v2
About the Hvac v2 PCB
Hvac v2 is an open source STM32 PCB design by candykingdom, published on GitHub. It is a 2-layer board measuring 125 × 93 mm, with 154 components from 39 distinct parts.
Its main chip is the STM32F030C8TX, from the STM32 family. Other key parts include the IFX007T, AP7381-33V, DS18B20 and AP7381-50V. By type, the board carries 48 capacitors, 45 resistors, 25 diodes, 14 connectors, 6 ICs and 4 transistors.
Main components on the Hvac v2
Hvac v2 bill of materials (BOM)
154 components, 39 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | STM32F030C8TX STM32F030C8Tx | LQFP-48_7x7mm_P0.5mm | U1 |
| 2 | IFX007T | TO-263-7_TabPin8 | U2, U3 |
| 1 | AP7381-33V AP7381-XXV | TO-92L_Inline_Wide | U4 |
| 1 | DS18B20 | TO-92_Inline | U5 |
| 1 | AP7381-50V AP7381-XXV | TO-92L_Inline_Wide | U6 |
| 4 | AO3400A | SOT-23 | Q1, Q2, Q3, Q4 |
| 1 | Anderson_two_redblack | Anderson_1336G1_right_angle_bottom_two | J1 |
| 2 | Conn_01x04 | PinHeader_1x04_P2.54mm_Horizontal | J2, J14 |
| 3 | Conn_01x02 | PinHeader_1x02_P2.54mm_Horizontal | J3, J9, J10 |
| 1 | Anderson_two_redblack_src | Anderson_1336G1_right_angle_bottom_two | J4 |
| 5 | Conn_01x03 | PinHeader_1x03_P2.54mm_Horizontal | J5, J6, J11, J12, J13 |
| 2 | Anderson_two_redblack_sink | Anderson_1336G1_right_angle_bottom_two | J7, J8 |
| 1 | PKM13EPYH4000-A0 Buzzer | MURATA_PKM13EPYH4000-A0 | BZ1 |
| 1 | 3550-2 ATC | FUSE_3550-2 | F1 |
| 5 | HOLE | HOLE_M4 | H1, H2, H3, H4, H5 |
| 1 | SLOT | SLOT_W2mm_H8mm | H6 |
| 2 | SolderJumper_2_Open | SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP1, JP2 |
| 1 | SW_Push | SW_TACTILE_5.1MM_TS-1187A-C-D-B | SW1 |
| 1 | PEC12R-4230F-S0024 Rotary_Encoder_Switch | BOURNS_PEC12R-4xxxF-Sxxxx | SW2 |
| 17 | TVS_5V | D_SOD-323 | D1, D2, D6, D7, D10, D11, D12, D13 +9 |
Show 19 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 5 | SB10150TA D_Schottky | D_DO-201AD_P12.70mm_Horizontal | D3, D8, D9, D17, D18 |
| 2 | SMBJ16CA TVS_12V | D_SMB_Handsoldering | D4, D16 |
| 1 | LED | LED_0805_2012Metric | D5 |
| 7 | 4.7UF 4.7uF | C_0603_1608Metric | C1, C9, C14, C38, C46, C47, C48 |
| 31 | 100NF 100nF | C_0402_1005Metric | C2, C4, C5, C6, C7, C8, C12, C13 +23 |
| 2 | 1NF 1nF | C_0402_1005Metric | C3, C20 |
| 4 | 220NF 220nF | C_0805_2012Metric | C10, C11, C15, C16 |
| 1 | 25PK1000MEFC10X16 1000uF | CP_Radial_D10.0mm_P5.00mm | C19 |
| 2 | 10NF 10nF | C_0402_1005Metric | C21, C27 |
| 1 | 25PK1000MEFC10X16 470uF | CP_Radial_D10.0mm_P5.00mm | C39 |
| 2 | 470 | R_0603_1608Metric | R1, R14 |
| 4 | 24K 24k | R_0603_1608Metric | R2, R6, R21, R22 |
| 13 | 10K 10k | R_0603_1608Metric | R3, R4, R5, R10, R11, R12, R17, R18 +5 |
| 10 | 150 | R_0603_1608Metric | R7, R13, R15, R23, R24, R39, R42, R43 +2 |
| 1 | 390K 390k | R_0603_1608Metric | R8 |
| 2 | 110K 110k | R_0603_1608Metric | R9, R29 |
| 1 | 47 | R_0603_1608Metric | R16 |
| 4 | 4K7 4k7 | R_0603_1608Metric | R25, R26, R27, R28 |
| 8 | 1k | R_0603_1608Metric | R31, R34, R35, R36, R37, R38, R40, R41 |
Hvac v2 design files
The KiCad project lives in the candykingdom/hvac-v2 repository on GitHub; these links point at the commit this page was built from.
Hvac v2: common questions
What microcontroller does the Hvac v2 use?
The Hvac v2 is built around the STM32F030C8TX, from the STM32 family.
How big is the Hvac v2 PCB?
The Hvac v2 measures 125 × 93 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Hvac v2?
154 components, from 39 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Hvac v2 design files?
From the candykingdom/hvac-v2 repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Hvac v2 design in my own project?
The repository has no license, so all rights stay with candykingdom. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Hvac v2 without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.
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