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Off-center ball grid, ST die ID 469, 4.02x4.27mm, 81 Ball, 9x9 Layout, 0.5mm Pitch, https://www.st.com/resource/en/datasheet/stulpi01a.pdf TFBGA-64, 8x8 raster, 3.357x3.657mm package, pitch 0.8mm TFBGA-121, 11x11 raster, 10x10mm package, pitch 0.4mm; see section 36.2.3 of http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-42363-SAM-D11_Datasheet.pdf WLCSP-56, 7x8 raster, 3.170x3.444mm package, pitch 0.8mm; see section 7.5 of http://www.st.com/resource/en/datasheet/DM00340475.pdf WLCSP-66, 9x9 raster, 4.039x3.951mm package, pitch 0.4mm; see section 7.5 of http://www.st.com/resource/en/datasheet/stm32f303r8.pdf WLCSP-49, 7x7 raster, 3.89x3.74mm package, pitch 0.4mm; see section 7.8 of http://www.st.com/resource/en/datasheet/DM00387108.pdf Texas Instruments, DSBGA, 1.4715x1.4715mm, 9 bump 3x3 (perimeter) array, NSMD pad definition Appendix A Artix-7 BGA, 18x18 grid, 15x15mm package, 1mm pitch; https://www.xilinx.com/support/documentation/user_guides/ug475_7Series_Pkg_Pinout.pdf#page=307, NSMD pad definition Appendix A BGA 238 0.5 CP236 CPG236 Artix-7 BGA, 22x22 grid, 23x23mm package, 1mm pitch; https://www.xilinx.com/support/documentation/user_guides/ug475_7Series_Pkg_Pinout.pdf#page=273, https://www.xilinx.com/support/documentation/user_guides/ug475_7Series_Pkg_Pinout.pdf#page=284, https://www.xilinx.com/support/documentation/user_guides/ug865-Zynq-7000-Pkg-Pinout.pdf#page=84, NSMD pad definition Appendix A BGA 1156 1 FF1156 FFG1156 FFV1156 Virtex-7 BGA, 34x34 grid, 35x35mm package, 1mm pitch; https://www.xilinx.com/support/documentation/user_guides/ug475_7Series_Pkg_Pinout.pdf#page=301, NSMD pad definition (http://www.ti.com/lit/ds/symlink/bq51050b.pdf, http://www.ti.com/lit/an/snva009ag/snva009ag.pdf Texas Instruments, DSBGA, 1.4715x1.4715mm, 9 bump 3x3 (perimeter) array, NSMD pad definition (http://www.ti.com/lit/ml/mpbg674/mpbg674.pdf, http://www.ti.com/lit/wp/ssyz015b/ssyz015b.pdf UCBGA-36, 6x6 raster, 2.5x2.5mm package, pitch 0.65mm; see section 7.2 of http://www.st.com/resource/en/datasheet/stm32f429ng.pdf UFBGA-201, 15x15 raster, 13x13mm package, pitch 0.4mm; see section 7.1.1 of http://www.st.com/resource/en/datasheet/stm32f401ce.pdf WLCSP-49, 7x7 raster, 3.417x3.151mm package, pitch 0.4mm; see section 7.6 of http://www.st.com/resource/en/datasheet/stm32f446ze.pdf UFBGA-144, 12x12 raster, 7x7mm package, pitch 0.4mm; see section 10.3 of https://www.parallax.com/sites/default/files/downloads/P8X32A-Propeller-Datasheet-v1.4.0_0.pdf 44-Lead Plastic Quad Flat, No Lead Package - 9x9 mm Body [QFN] with corner pads and trace routing to de-bodge the pots. Updates the potentiometer pads and trace routing to de-bodge the pots. D5bfb6e27b 's notes on repique/caixa, two or three for surdos paper "A4") Add Kick as separate sheet ## Photos ### Photos ## Documentation: * [Schematic](Docs/precadsr.pdf) * PCB layout: [front](Docs/precadsr_layout_front.pdf), [back](Docs/precadsr_layout_back.pdf) * [BOM](Docs/precadsr_bom.md) * [Build notes](Docs/build.md) How to use your choice of 9 mm or 16 mm have been validly granted by You to the jack body made the height about right. I suggest the following procedure for assembly. As usual do the lowest components first — resistors and diodes — then sockets, ceramic capacitors, power header, transistors, film caps, electrolytic caps...

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