VoxSense Sensor Board
About the VoxSense Sensor Board
VoxSense Sensor Board is an open source FPGA PCB design by MichalVarsanyi, published on GitHub under the MIT license. It is a 4-layer board measuring 85 × 15.8 mm, with 92 components from 58 distinct parts.
Its main chip is the XC7A35T-CSG324, from the FPGA family. Other key parts include the TDS5311P, TPS82084, LT8645S, TPD4E02B04 and N25Q032A. By type, the board carries 29 capacitors, 27 resistors, 14 ICs, 13 diodes, 3 connectors and 2 crystals.
It belongs with the sensors designs in this gallery.
From the project
VoxLink is a high-speed solution that allows interfacing of up to 100 sensors using a single high-speed host device. The communication protocol is agnostic to the sensor board, freeing the user from handling low-level communication. This project is part of my Bachelor's thesis at the Czech Technical University in Prague.
- During programming, exceeding internal clocking speeds of 100MHz on the iCE40UL1K-CM36AI FPGA proved to be virtually impossible. In the future, instantiating the hard IP I2C blocks in the FPGA silicon may increase the speed. Realistically, however, switching to a higher speed grade of FPGAs will probably be the best option.
It may seem that 50-100 MHz is unreasonably fast; however, just 40 sensors at 9 kHz get very close to this ballpark. It is difficult to determine what may increase the bandwidth in the future, so it's better to have an excess than to have too little bandwidth.…
Main components on the VoxSense Sensor Board
VoxSense Sensor Board bill of materials (BOM)
92 components, 58 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TDS5311P TPS25942ARVCR Semtech | QFN50P300X400X80-21N | U101 |
| 1 | TPS82084 TPS7A20L_1V2 TI | Texas_X2SON-4_1x1mm_P0.65mm | U201 |
| 1 | TPS82084 TPS7A20L_2V2 TI | Texas_X2SON-4_1x1mm_P0.65mm | U202 |
| 1 | LT8645S TPS7A20L_3V3 ADI | Texas_X2SON-4_1x1mm_P0.65mm | U203 |
| 1 | TPS82084 TLV840 TI | SOT-23-5 | U204 |
| 1 | XC7A35T-CSG324 ICE40UL1K-CM36AI Xilinx | UCBGA-36_2.5x2.5mm_Layout6x6_P0.4mm | U301 |
| 2 | TPD4E02B04 | USON-10_2.5x1.0mm_P0.5mm__Reduced_Paste | U302, U504 |
| 1 | N25Q032A | U-PDFN-8 | U305 |
| 1 | IS25LP256D BNO086 ISSI | LGA-28_5.2x3.8mm_P0.5mm | U401 |
| 1 | SN74AXC4T774 TPD4E02B04 TI | USON-10_2.5x1.0mm_P0.5mm__Reduced_Paste | U501 |
| 1 | FT232H TPD4E02B04 FTDI | USON-10_2.5x1.0mm_P0.5mm__Reduced_Paste | U502 |
| 1 | 93LC56B TPD4E02B04 Microchip | USON-10_2.5x1.0mm_P0.5mm__Reduced_Paste | U503 |
| 1 | CBTU02044 | HUQFN-16 | U505 |
| 1 | ASCO | Oscillator_SMD_Abracon_ASCO-4Pin_1.6x1.2mm | Y301 |
| 1 | 12MHZ 32.768 kHz ECS | Crystal_SMD_MicroCrystal_CC8V-T1A-2Pin_2.0x1.2mm | Y401 |
| 1 | PicoBlade | Molex_PicoBlade_53048-0810_1x08_P1.25mm_Horizontal | J302 |
| 1 | RJ45_Input | CONN_855035-101_MOL | J501 |
| 1 | RJ45_Output | CONN_855035-101_MOL | J502 |
| 1 | Reset | SW_Push_SPST_NO_Alps_SKRK | SW301 |
| 1 | Slide Switch | SSAJ110100_1 | SW501 |
Show 38 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | TestPoint | Vox_Testpoint | TP501, TP502 |
| 3 | LED | LED_0603_1608Metric | D101, D305, D308 |
| 3 | Schottky | D_0402_1005Metric | D102, D103, D302 |
| 5 | TVS | D_0402_1005Metric | D301, D303, D304, D501, D502 |
| 1 | RX | LED_0603_1608Metric | D306 |
| 1 | TX | LED_0603_1608Metric | D307 |
| 1 | 4.7U 2u2 Murata | C_1210_3225Metric | C101 |
| 1 | 100N 100n Murata | C_0603_1608Metric | C102 |
| 1 | 10N 1n Murata | C_0402_1005Metric | C103 |
| 2 | 22U 1u Murata | C_0402_1005Metric | C201, C202 |
| 4 | 100U 1u Murata | C_0402_1005Metric | C203, C204, C205, C206 |
| 3 | 100U 100n Murata | C_0402_1005Metric | C207, C210, C216 |
| 1 | 100U 33n Murata | C_0402_1005Metric | C208 |
| 2 | 100U 4u7 Murata | C_0603_1608Metric | C209, C215 |
| 1 | 22U 4u7 Murata | C_0603_1608Metric | C213 |
| 2 | 22U 100n Murata | C_0402_1005Metric | C214, C217 |
| 5 | 100N 100n Murata | C_0402_1005Metric | C301, C302, C402, C403, C502 |
| 3 | 10U 100n Murata | C_0402_1005Metric | C303, C304, C501 |
| 1 | 100n Murata | C_0402_1005Metric | C401 |
| 2 | 15pF | C_0402_1005Metric | C404, C405 |
| 1 | C201283 1R Walter | R_0603_1608Metric | R101 |
| 1 | C445774 422k Panasonic | R_0402_1005Metric | R102 |
| 1 | 22K 25k5 Vishay | R_0402_1005Metric | R103 |
| 1 | 1.1MEG 100k Vishay | R_0402_1005Metric | R104 |
| 1 | 1.1MEG 1k Vishay | R_0402_1005Metric | R105 |
| 1 | 280K 150k Vishay | R_0402_1005Metric | R106 |
| 1 | 499K 10k Vishay | R_0402_1005Metric | R201 |
| 1 | 4x22R | EXBN8V101JX | R301 |
| 1 | 22R | R_0402_1005Metric | R302 |
| 4 | 510R | R_0402_1005Metric | R303, R306, R307, R308 |
| 2 | 10k | R_0402_1005Metric | R304, R305 |
| 1 | 200R 4k7 Vishay | R_0402_1005Metric | R401 |
| 1 | 100R 4k7 Vishay | R_0402_1005Metric | R402 |
| 3 | 4.7K 10k Vishay | R_0402_1005Metric | R403, R404, R405 |
| 2 | 4.7K 4k7 Vishay | R_0402_1005Metric | R406, R407 |
| 1 | 4.7K 22R Vishay | R_0402_1005Metric | R408 |
| 1 | 0R Vishay | R_0402_1005Metric | R501 |
| 3 | 12K 0R Vishay | R_0402_1005Metric | R502, R503, R504 |
VoxSense Sensor Board design files
The KiCad project lives in the MichalVarsanyi/VoxLink repository on GitHub; these links point at the commit this page was built from.
VoxSense Sensor Board: common questions
What microcontroller does the VoxSense Sensor Board use?
The VoxSense Sensor Board is built around the XC7A35T-CSG324, from the FPGA family.
How big is the VoxSense Sensor Board?
The VoxSense Sensor Board measures 85 × 15.8 mm, has 4 copper layers and is 1.6092 mm thick.
How many components are on the VoxSense Sensor Board?
92 components, from 58 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 VoxSense Sensor Board design files?
From the MichalVarsanyi/VoxLink 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 VoxSense Sensor Board design in my own project?
Yes, under the terms of its MIT license, which MichalVarsanyi chose for the repository.
Can I test firmware for the VoxSense Sensor Board without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug FPGA firmware against it before you order a PCB.
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FPGAVoxLink - Lattice Core Module
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VoxLink - BNO086 Sensor Module
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FPGACore Module Intel
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VoxLink - Shell Module - Daisy
54 × 29.5 mm9 parts4LMIT1
VoxLink Programmer Shell
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VoxLink - Shell Module Bus
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