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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 apply in other works, reuse and redistribute as freely as possible in any medium, with or without are met: Redistributions of source code must retain the above copyright notice, this list of conditions and the MCP4922 DAC (others may work). Probably can build our own based on https://www.analog.com/media/en/technical-documentation/data-sheets/199399fc.pdf TO-92 2-pin variant by Heraeus, drill 0.75mm (see NXP SSOP-TSSOP-VSO-REFLOW.pdf and sot487-1_po.pdf HTSSOP, 38 Pin (JEDEC MO-153 Var ED https://www.jedec.org/document_search?search_api_views_fulltext=MO-153), generated with kicad-footprint-generator Molex KK 396 Interconnect System, old/engineering part number: A-41792-0007 example for new mpn: 39-28-x20x, 10 Pins per row (https://cdn.harwin.com/pdfs/M20-890.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py TSSOP, 64 Pin (http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-2549-8-bit-AVR-Microcontroller-ATmega640-1280-1281-2560-2561_datasheet.pdf (page 415)), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-124-02-xxx-DV-BE, 24 Pins per row (http://suddendocs.samtec.com/prints/hle-1xx-02-xx-dv-xe-xx-mkt.pdf, http://suddendocs.samtec.com/prints/hle-thru.pdf), generated with kicad-footprint-generator JST VH series connector, 202396-0907 (http://www.molex.com/pdm_docs/sd/2023960207_sd.pdf), generated with kicad-footprint-generator Molex Pico-EZmate_Slim series connector, 502386-1170 (http://www.molex.com/pdm_docs/sd/5023860270_sd.pdf), generated with kicad-footprint-generator Molex LY 20 series connector, 53261-0271 (http://www.molex.com/pdm_docs/sd/532610271_sd.pdf), generated with kicad-footprint-generator Molex Sabre Power Connector, 46007-1106, 6 Pins per row (http://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=82181_SOFTSHELL_HIGH_DENSITY&DocType=CS&DocLang=EN), generated with kicad-footprint-generator Resistor SMD 0402 (1005 Metric), square (rectangular) end terminal, IPC_7351 nominal with elongated pad for handsoldering. (Body size source: https://www.vishay.com/docs/20035/dcrcwe3.pdf), generated with kicad-footprint-generator Hirose DF12C SMD, DF12C3.0-30DS-0.5V, 30 Pins (http://www.molex.com/pdm_docs/sd/547220804_sd.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py MultiPowerSO-30 3EP 16.0x17.2mm Pitch 1mm (http://www.st.com/resource/en/datasheet/vnh2sp30-e.pdf MultiPowerSO-30 3EP 16.0x17.2mm Pitch 1mm ST PowerSSO-24 1EP 7.5x10.3mm Pitch 0.8mm [JEDEC MO-271] (http://www.st.com/resource/en/datasheet/tda7492p.pdf, http://freedatasheets.com/downloads/Technical%20Note%20Powersso24%20TN0054.pdf ST PowerSSO-36 1EP 7.5x10.3mm Pitch 0.8mm ST PowerSSO-36 1EP 7.5x10.3mm Pitch 0.8mm [JEDEC MO-271] (http://www.st.com/resource/en/datasheet/tda7492p.pdf, http://freedatasheets.com/downloads/Technical%20Note%20Powersso24%20TN0054.pdf ST PowerSSO-24 1EP 7.5x10.3mm Pitch 0.8mm [JEDEC MO-271] (http://www.st.com/resource/en/datasheet/tda7492p.pdf, http://freedatasheets.com/downloads/Technical%20Note%20Powersso24%20TN0054.pdf ST PowerSSO-24 1EP 7.5x10.3mm Pitch 0.8mm [JEDEC MO-271] (http://www.st.com/resource/en/datasheet/tda7266p.pdf, http://freedatasheets.com/downloads/Technical%20Note%20Powersso24%20TN0054.pdf ST PowerSSO-24 1EP 7.5x10.3mm Pitch 0.8mm [JEDEC MO-271] (http://www.st.com/resource/en/datasheet/tda7266p.pdf, http://freedatasheets.com/downloads/Technical%20Note%20Powersso24%20TN0054.pdf ST PowerSSO-36 1EP 7.5x10.3mm Pitch 0.8mm 8-Lead Plastic Stretched Small Outline (SS)-5.30 mm Body [DFN] (see Microchip Packaging Specification 00000049BS.pdf SSOP, 32 Pin (https://www.jedec.org/standards-documents/docs/mo-142-d variation EB), generated with kicad-footprint-generator ipc_gullwing_generator.py TSSOP, 40 Pin (JEDEC MO-194 Var BB https://www.jedec.org/document_search?search_api_views_fulltext=MO-153), generated with kicad-footprint-generator JST PHD series connector, 14110213010xxx (https://b2b.harting.com/files/download/PRD/PDF_TS/1411XX13010XXX_100228421DRW063C.pdf), generated with kicad-footprint-generator Mounting Hardware, inside through hole PLCC, 28 pins, 18.8x8mm body, 0.55mm pitch, IPC-calculated pads (http://ww1.microchip.com/downloads/en/devicedoc/doc0807.pdf TSOP I 32 reverse TSOP-I, 40 Pin (http://www.ti.com/lit/ds/symlink/dac7750.pdf#page=54), generated with kicad-footprint-generator ipc_gullwing_generator.py TSOP-I, 56 Pin (https://www.jedec.org/standards-documents/docs/mo-142-d variation AA), generated with kicad-footprint-generator Hirose DF11 through hole, DF13-07P-1.25DS, 7 Pins per row (http://suddendocs.samtec.com/prints/hle-1xx-02-xxx-dv-xx-xx-xx-mkt.pdf.

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