Convey
About the Convey PCB
Convey is an open source PCB design by kennito2035, published on GitHub under the CERN-OHL-S-2.0 license. It is a 4-layer board measuring 64 × 64 mm, with 141 components from 51 distinct parts.
Other key parts include the ADS1299IPAG, REM1-0512S, TPS7A4901, SN74HC4040 and ISO7761FDW. By type, the board carries 68 capacitors, 45 resistors, 11 ICs, 8 diodes, 5 connectors and 1 crystal.
It belongs with the test & measurement designs in this gallery.
From the project
CONVEY: open 8-channel patient-isolated EEG/sEMG/ECG acquisition board (ADS1299, KiCad 10)
CONVEY is an open-hardware, patient-isolated, general-purpose biosignal front end: eight 24-bit differential channels around the TI ADS1299, on a 64 × 64 mm 4-layer board that records EEG, surface EMG or ECG depending only on configuration and electrode montage. It runs from a 5 V USB power bank, isolates the subject from the host to 5000 VRMS (reinforced), cancels mains interference in hardware with an active bias drive, and carries a 6-axis IMU clock-locked to the ADC's oscillator** so motion and biosignal share one time base. Any microcontroller drives it over a 15-pin SPI header; a…
Main components on the Convey
Convey bill of materials (BOM)
141 components, 51 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ADS1299IPAG | TQFP-64_10x10mm_P0.5mm | U1 |
| 1 | REM1-0512S | REM1-0512S_SIP7 | U2 |
| 2 | TPS7A4901 | TPS7A4901_HVSSOP-8-1EP_3x3mm_P0.65mm_ThermalVias | U3, U4 |
| 1 | SN74HC4040 | TSSOP-16_4.4x5mm_P0.65mm | U5 |
| 1 | ISO7761FDW | SOIC-16W_7.5x10.3mm_P1.27mm_8mmCreepage | U6 |
| 1 | ISO7762FDW | SOIC-16W_7.5x10.3mm_P1.27mm_8mmCreepage | U7 |
| 1 | ICM-42688-P | ICM-42688-P_LGA-14_3x2.5mm_P0.5mm | U8 |
| 1 | TLV70233 | SOT-23-5 | U9 |
| 1 | TPS3808G30 | SOT-23-6 | U10 |
| 1 | C2155778 TPS259631DDAR | Texas_HTSOP-8-1EP_3.9x4.9mm_P1.27mm_EP2.95x4.9mm_Mask2.4x3.1mm_ThermalVias | U11 |
| 1 | ASEM1-2.048MHZ | ASEM1-2.048MHZ_3.2x2.5mm | Y1 |
| 1 | C54102 MCU_HDR | PinHeader_1x15_P2.54mm_Vertical | J1 |
| 1 | ELECTRODES | PinHeader_2x08_P2.54mm_Horizontal | J2 |
| 1 | C158011 JST_ZH_BIAS | JST_ZH_B2B-ZR_1x02_P1.50mm_Vertical | J3 |
| 1 | C158011 JST_ZH_SRB | JST_ZH_B2B-ZR_1x02_P1.50mm_Vertical | J4 |
| 1 | C158011 PWR_IN | JST_ZH_B2B-ZR_1x02_P1.50mm_Vertical | J5 |
| 1 | BIAS_LOOP | PinHeader_1x02_P2.54mm_Vertical | JP2 |
| 1 | 0R_STAR 0R_star | R_0805_2012Metric | NB1 |
| 5 | TPD4E1B06 | SOT-563 | D1, D2, D3, D4, D5 |
| 1 | C8598 reverse-prot | D_SOD-123 | D6 |
Show 31 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | C2286 RED | LED_0603_1608Metric | D7 |
| 1 | C2288 BLUE | LED_0603_1608Metric | D8 |
| 1 | C17477 0R | R_0805_2012Metric | FB1 |
| 19 | 100N 100n | C_0402_1005Metric | C1, C2, C3, C4, C5, C7, C8, C10 +11 |
| 7 | 10U 10u | C_0805_2012Metric | C6, C9, C11, C13, C46, C50, C66 |
| 1 | C79109 100u_TANT | C_1210_3225Metric | C15 |
| 4 | 1u | C_0402_1005Metric | C16, C17, C19, C47 |
| 1 | 1n | C_0603_1608Metric | C20 |
| 8 | 10N 10n | C_0603_1608Metric | C21, C22, C23, C24, C25, C26, C27, C28 |
| 16 | 560p | C_0402_1005Metric | C29, C30, C31, C32, C33, C34, C35, C36 +8 |
| 1 | 100n | C_0402_1005Metric | C45 |
| 1 | C14860 10u | C_1206_3216Metric | C48 |
| 1 | 22P 22p | C_0402_1005Metric | C51 |
| 5 | 10N 10n | C_0402_1005Metric | C52, C53, C56, C63, C67 |
| 1 | 100P 100p | C_0402_1005Metric | C54 |
| 1 | 2U2 2u2 | C_0603_1608Metric | C62 |
| 2 | C29936 1u_25V | C_0603_1608Metric | C64, C65 |
| 19 | 5.11k | R_0805_2012Metric | R1, R2, R3, R4, R5, R6, R7, R8 +11 |
| 1 | 1M | R_0402_1005Metric | R17 |
| 12 | 10K 10k | R_0402_1005Metric | R21, R22, R23, R24, R25, R44, R45, R46 +4 |
| 1 | 100 | R_0402_1005Metric | R50 |
| 3 | C25741 100k | R_0402_1005Metric | R51, R54, R56 |
| 1 | 1k | R_0402_1005Metric | R52 |
| 1 | C2479405 324k | R_0402_1005Metric | R53 |
| 1 | C3013156 178k | R_0402_1005Metric | R55 |
| 1 | 1.5K 1.5k | R_0603_1608Metric | R58 |
| 1 | 330 | R_0603_1608Metric | R59 |
| 1 | C25794 51k | R_0402_1005Metric | R60 |
| 1 | C25908 5.6k | R_0402_1005Metric | R61 |
| 1 | C25756 15k | R_0402_1005Metric | R62 |
| 1 | C4109 2k | R_0402_1005Metric | R63 |
Convey design files
The KiCad project lives in the kennito2035/convey repository on GitHub; these links point at the commit this page was built from.
Convey: common questions
How big is the Convey PCB?
The Convey measures 64 × 64 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Convey?
141 components, from 51 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 Convey design files?
From the kennito2035/convey 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 Convey design in my own project?
Yes, under the terms of its CERN-OHL-S-2.0 license, which kennito2035 chose for the repository.
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