Nitrogen
Nitrogen is an open source STM32 PCB design by eddyem: a 4-layer, 80 × 80 mm board with 136 components (89 distinct parts). It is built around the BME280, STM32F303CBT6, ISO1050DUB, 74HC4051 and more. Filed under sensors.
Code samples and ready projects based on bare-metal STM32
Automated liquid nitrogen flooding machine ====================================
(all GPIO outs are push-pull if not mentioned another)
- Channel 1 - ADC1 - Channel 4 - SPI2 Rx - Channel 5 - SPI2 Tx - Channel 6 - I2C1 Tx - Channel 7 - I2C1 Rx
Built around
Parts list
136 components, 89 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | BME280 MCP2551-I-SN | SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | STM32F303CBT6 USBLC6-2SC6 | SOT-23-6 | U2 |
| 1 | ISO1050DUB MAX3485 | SO-8_3.9x4.9mm_P1.27mm | U3 |
| 1 | 74HC4051 STM32F302VBTx | LQFP-100_14x14mm_P0.5mm | U4 |
| 1 | 74HC4051 BME280 | Bosch_LGA-8_2.5x2.5mm_P0.65mm_ClockwisePinNumbering | U5 |
| 1 | PC844 LM2576HVS-5 | TO-263-5_TabPin3 | U6 |
| 1 | PC844 LM1117-3.3 | SOT-223-3_TabPin2 | U7 |
| 1 | LM2576HVS-5 LM1117-3.3 | SOT-223-3_TabPin2 | U8 |
| 1 | B0505S-1W AOD4184 | TO-252-2 | Q1 |
| 1 | B0509S-1W AOD4184 | TO-252-2 | Q2 |
| 1 | SI2308 AOD4184 | TO-252-2 | Q3 |
| 1 | B2424S-2W AOD4184 | TO-252-2 | Q4 |
| 1 | B0505S-2W DTA114Y | SOT-323_SC-70_Handsoldering | Q5 |
| 1 | SI2300 | SOT-23_Handsoldering | Q6 |
| 1 | IRF9310 | SO-8_3.9x4.9mm_P1.27mm | Q8 |
| 1 | SI2305 | SOT-23_Handsoldering | Q9 |
| 1 | 8MHZ NX5032GA-8MHz | Crystal_SMD_5032-2Pin_5.0x3.2mm | Y1 |
| 1 | ADC8,9 | JST_EH_B3B-EH-A_1x03_P2.50mm_Vertical | J1 |
| 3 | Screw_Terminal_01x02 | TerminalBlock_Phoenix_MKDS-1,5-2_1x02_P5.00mm_Horizontal | J2, J3, J13 |
| 3 | IDC2.54_02x05 | IDC-Header_2x05_P2.54mm_Vertical | J4, J10, J11 |
Show 69 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | Power | JST_EH_B3B-EH-A_1x03_P2.50mm_Vertical | J5, J12 |
| 1 | ADCext | JST_EH_B4B-EH-A_1x04_P2.50mm_Vertical | J6 |
| 1 | Prog | PinSocket_1x06_P1.27mm_Vertical | J7 |
| 1 | USB_B | USB_B_TE_5787834_Vertical | J8 |
| 1 | RS-485 485/CAN | JST_EH_B5B-EH-A_1x05_P2.50mm_Vertical | J9 |
| 1 | U3/U4 | JST_EH_B3B-EH-A_1x03_P2.50mm_Vertical | J14 |
| 1 | I2C/U1 | JST_EH_B3B-EH-A_1x03_P2.50mm_Vertical | J15 |
| 1 | buzzer | PinSocket_1x02_P2.54mm_Vertical | J16 |
| 1 | LEDs | JST_EH_B5B-EH-A_1x05_P2.50mm_Vertical | J18 |
| 1 | SOLDERJUMPER_2_OPEN CAN | SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP1 |
| 1 | SOLDERJUMPER_2_OPEN USB5V | SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP2 |
| 1 | SOLDERJUMPER_2_OPEN MCU | SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP3 |
| 1 | SOLDERJUMPER_2_OPEN 3v3 | SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP4 |
| 1 | SOLDERJUMPER_2_OPEN Vadc | SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP5 |
| 1 | SOLDERJUMPER_2_OPEN RS-485 | SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP6 |
| 1 | 5Vusb | TestPoint_THTPad_1.5x1.5mm_Drill0.7mm | TP1 |
| 1 | Vin | TestPoint_THTPad_1.5x1.5mm_Drill0.7mm | TP2 |
| 1 | Gnd | TestPoint_THTPad_1.5x1.5mm_Drill0.7mm | TP3 |
| 1 | 24V 5V | TestPoint_THTPad_1.5x1.5mm_Drill0.7mm | TP4 |
| 1 | 3.3V | TestPoint_THTPad_1.5x1.5mm_Drill0.7mm | TP5 |
| 1 | 4.6V Vadc | TestPoint_THTPad_1.5x1.5mm_Drill0.7mm | TP6 |
| 4 | SS14 | D_SMA_Handsoldering | D1, D2, D3, D4 |
| 1 | MBRS130L | D_SMB_Handsoldering | D5 |
| 2 | PESD1CAN | SOT-23 | D6, D7 |
| 1 | CESD3v3 | D_SOD-523 | D8 |
| 1 | SMBJ30A SP0505BAHT | SOT-23-6 | D9 |
| 1 | PESD1CAN SP0505BAHT | SOT-23-6 | D10 |
| 1 | 1N5822 MM3Z7V5 | D_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D11 |
| 1 | B340A 1N5822 | D_DO-201_P3.81mm_Vertical_AnodeUp | D12 |
| 1 | B340A SP0505BAHT | SOT-23-6 | D13 |
| 1 | 100U 100u | L_Toroid_Horizontal_D6.5mm_P10.00mm_Diameter7-5mm_Amidon-T25 | L1 |
| 1 | 2.5k@100MHz | L_0805_2012Metric_Pad1.15x1.40mm_HandSolder | L2 |
| 2 | 0.1 1u | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1, C4 |
| 1 | 0.1 6 | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C2 |
| 1 | 6 | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C3 |
| 8 | 0.1 | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C5, C10, C13, C14, C16, C19, C20, C22 |
| 4 | 0.1 | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C6, C7, C8, C11 |
| 2 | 1u | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C9, C12 |
| 1 | 47u 35V | CP_EIA-6032-28_Kemet-C_Pad2.25x2.35mm_HandSolder | C15 |
| 2 | 47u 6V | CP_EIA-3216-18_Kemet-A_Pad1.58x1.35mm_HandSolder | C17, C21 |
| 1 | 47u 10V | CP_EIA-6032-28_Kemet-C_Pad2.25x2.35mm_HandSolder | C18 |
| 1 | 10K 330 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1 |
| 1 | 4K7 510 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R2 |
| 5 | 330 10k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3, R5, R7, R9, R11 |
| 3 | 330 510 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R4, R6, R8 |
| 1 | 330 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R10 |
| 1 | 4K7 10k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R12 |
| 1 | 3K3 1k5 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R13 |
| 4 | 3K3 6.8 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R14, R16, R17, R20 |
| 2 | 3K3 22 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R15, R18 |
| 1 | 3K3 120 | R_1210_3225Metric_Pad1.30x2.65mm_HandSolder | R19 |
| 3 | 560 330 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R21, R22, R24 |
| 1 | 120 4k7 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R23 |
| 1 | 560 4k7 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R25 |
| 2 | 560 6.8 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R26, R27 |
| 2 | 560 1k 0.1% | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R28, R29 |
| 1 | 1K5 1k 0.1% | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R30 |
| 2 | 1k 0.1% | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R31, R32 |
| 1 | 10M 1k 0.1% | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R33 |
| 4 | 7.5 1k 0.1% | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R34, R35, R36, R37 |
| 1 | 7.5 4k7 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R38 |
| 1 | 7.5 10k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R39 |
| 1 | 91K 6.8 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R40 |
| 1 | 10K 10k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R41 |
| 3 | 10K 6.8 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R42, R43, R47 |
| 1 | 10K 4k7 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R44 |
| 2 | 6.8 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R45, R46 |
| 1 | 330 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R54 |
| 5 | 330 | R_Array_Convex_4x0603 | RN1, RN2, RN3, RN4, RN5 |
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