FreeEEG32-beta shorting minuses
FreeEEG32-beta shorting minuses is an open source STM32 PCB design by neuroidss: a 4-layer, 70 × 70 mm board with 224 components (36 distinct parts). It is built around the AD7771BCPZ, LP5907QMFX-3.3Q1, ADR4525BRZ, CB3LV-3I-8M1920 and more.
as FreeEEG32 plus alpha1.5 test passed, FreeEEG32 project changed to beta version
Docker container setup (Linux). Extract the following and run: - Compilation: ./gcc-arm-none-eabirun.sh - Flashing: sudo ./openocdflash.sh
The AC6 stuff is deprecated but the blue pill is still needed.
Assembly: https://github.com/neuroidss/FreeEEG32-beta/blob/master/AssemblyFiles/KiCAD/out/assembly.zip
BOM: https://github.com/neuroidss/FreeEEG32-beta/blob/master/AssemblyFiles/bom/components%20FreeEEG32%20beta.csv
Built around
Parts list
224 components, 36 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 4 | AD7771BCPZ AD7779 Analog Devices | QFN-64-1EP_9x9mm_P0.5mm_EP7.3x7.3mm | U1, U2, U3, U4 |
| 3 | LP5907QMFX-3.3Q1 LP5907 Texas Instruments | SOT-23-5 | U5, U6, U10 |
| 1 | ADR4525BRZ ADR4525 Analog Devices | SOIC-8_3.9x4.9mm_P1.27mm | U7 |
| 1 | CB3LV-3I-8M1920 FXO-SM7_OSC-SMD7050_short | Oscillator_SMD_EuroQuartz_XO91-4Pin_7.0x5.0mm_HandSoldering | U8 |
| 1 | STM32H743ZIT6U STM32H743ZITx STMicroelectronics | LQFP-144_20x20mm_P0.5mm | U9 |
| 1 | LSM6DSOXTR LSM6DS3 | Bosch_LGA-14_3x2.5mm_P0.5mm | U11 |
| 1 | SN6505BDBVR SN6505B | SOT-23-6_Handsoldering | U12 |
| 1 | 47352-1001 473521001 | 473521001 | U13 |
| 1 | ADUM3160BRWZ ADuM3160 | SOIC-16W_7.5x10.3mm_P1.27mm | U17 |
| 1 | ADUM1402BRWZ | SOIC-16W_7.5x10.3mm_P1.27mm | U18 |
| 1 | ISO7341CDW ISO7341c | SOIC-16W_7.5x10.3mm_P1.27mm | U19 |
| 1 | 32768Hz | Crystal_SMD_EuroQuartz_EQ161-2Pin_3.2x1.5mm_HandSoldering | Y1 |
| 1 | 7B-16.000MEEQ-T 16MHz TXC | Crystal_SMD_EuroQuartz_MJ-4Pin_5.0x3.2mm_HandSoldering | Y2 |
| 2 | 105017-1001 USB_B_Micro Molex | USB_Micro-B_Molex-105017-0001 | J37, J51 |
| 4 | 68021-220HLF Conn_02x10_Odd_Even | PinHeader_2x10_P2.54mm_Horizontal | J53, J54, J55, J56 |
| 2 | 68021-406HLF Conn_02x03_Odd_Even | PinHeader_2x03_P2.54mm_Horizontal | J57, J58 |
| 4 | 68021-402HLF Conn_01x02 | PinHeader_2x01_P2.54mm_Horizontal | J61, J62, J63, J64 |
| 4 | PRPC001DAAN-RC Conn_01x02 | PinHeader_1x02_P2.54mm_Vertical | J65, J69, J73, J80 |
| 7 | SSQ-102-03-G-S Conn_01x02 | PinSocket_1x02_P2.54mm_Vertical | J78, J79, J81, J85, J88, J89, J90 |
| 2 | 68021-404HLF Conn_02x02_Odd_Even | PinHeader_2x02_P2.54mm_Horizontal | J82, J83 |
Show 16 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | B3U-1000P SW_Push | SW_SPST_B3U-1000P-B | SW1, SW2 |
| 1 | 750315371 | 750315371 | T1 |
| 2 | MBR0520LT1G D_Schottky | D_SOD-123 | D1, D2 |
| 76 | CL05B104KO5NNNC 100n | C_0402_1005Metric | C1, C3, C5, C7, C9, C11, C13, C14 +68 |
| 40 | CL05A105KO5NNNC 1u | C_0402_1005Metric | C2, C4, C6, C8, C10, C12, C16, C18 +32 |
| 8 | GRM188R71A225KE15D 2.2u | C_0603_1608Metric | C85, C86, C87, C88, C100, C104, C109, C110 |
| 1 | GRM21BR60J226ME39L 22u | C_0805_2012Metric | C90 |
| 3 | GRM188R60J106ME47D 10u | C_0603_1608Metric | C92, C113, C115 |
| 1 | C0603C475K9PACTU 4.7u | C_0603_1608Metric | C122 |
| 2 | GRM1555C1H200JA01D CL1 | C_0402_1005Metric | C123, C125 |
| 2 | GRM1555C1H200JA01D CL2 | C_0402_1005Metric | C124, C126 |
| 1 | RC0402JR-070RL R_EXT | R_0402_1005Metric | R10 |
| 4 | RC0402FR-0724RL 24 | R_0402_1005Metric | R99, R100, R101, R102 |
| 2 | RC0402JR-074K7L 4k7 | R_0402_1005Metric | R108, R109 |
| 4 | DNP 0 | R_0402_1005Metric | R114, R115, R116, R117 |
| 32 | 0 | R_0402_1005Metric | R119, R120, R121, R122, R123, R124, R125, R126 +24 |
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