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Documentation: ### Documentation: * [Schematic](Docs/precadsr.pdf) * PCB layout: [front](Docs/precadsr_layout_front.pdf), [back](Docs/precadsr_layout_back.pdf * [How to use](Docs/use.md 96f746fa2d Final tweaks, version submitted to JLCPCB on 20240124 Final tweaks, version submitted to JLCPCB on 20240124 Final tweaks, version submitted to JLCPCB on 20240124 3d279dd88c Finish schematic, add PDF Features already done: Internal clock with manual control. Clock in socket with 80 contacts (40 each side), through-hole, http://www.4uconnector.com/online/object/4udrawing/10156.pdf 4UCON 10156 Card edge socket with 80 contacts AT ISA 16 bits Bus Edge Connector x1 http://www.ritrontek.com/uploadfile/2016/1026/20161026105231124.pdf#page=70 Highspeed card edge connector for 1.6mm PCB's with 08 contacts (polarized Highspeed card edge connector for PCB's with 30 contacts (not polarized Highspeed card edge connector for PCB's with 20 contacts (polarized Highspeed card edge connector for 1.6mm PCB's with 30 contacts (polarized Highspeed card edge connector for 1.6mm PCB's with 70 contacts (not polarized Highspeed card edge card connector socket for 1.57mm PCBs, vertical, alignment pins, weld tabs (source: https://suddendocs.samtec.com/prints/hsec8-1xxx-xx-xx-dv-x-xx-footprint.pdf Samtec Micro Mate Discrete Wire Terminal Strip, 1.00 mm Pitch, Single Row, Vertical, Latch (source: https://suddendocs.samtec.com/prints/t1m-single-row-footprint.pdf conn samtec discrete wire terminal Samtec Micro Mate Discrete Wire Terminal Strip, 1.00 mm Pitch, Single Row, Horizontal, Latch (source: https://suddendocs.samtec.com/prints/t1m-single-row-footprint.pdf TE Connectivity, HDI, Wire-to-Board, Fully Shrouded, Header: https://www.te.com/usa-en/product-440055-2.datasheet.pdf connector header hdr horizontal vertical shrouded fully-shrounded 440054-2 2-440054-2 4-440054-2 6-440054-2 2-440054-6 4-440054-6 6-440054-6 TE Connectivity, HDI, Wire-to-Board, Fully Shrouded, Header: https://www.te.com/usa-en/product-440055-2.datasheet.pdf connector header hdr horizontal vertical shrouded fully-shrounded 440055-2 2-440055-2 4-440055-2 6-440055-2 8-440055-2 TE Connectivity Buchanan WireMate connector, Poke-In series, 3-way, 4.0mm pitch, AWG18-22 (0.3255-0.823mm2), https://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Customer+Drawing%7F2834006%7FB6%7Fpdf%7FEnglish%7FENG_CD_2834006_B6.pdf%7F2834006-1 TE Connectivity Buchanan WireMate connector, Poke-In series, 2-way, 4.0mm pitch, AWG18-22 (0.3255-0.823mm2), https://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Customer+Drawing%7F2834006%7FB6%7Fpdf%7FEnglish%7FENG_CD_2834006_B6.pdf%7F2834006-1 TE Connectivity Buchanan WireMate connector, Poke-In series, 5-way, 4.0mm pitch, AWG18-22 (0.3255-0.823mm2), https://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Customer+Drawing%7F2834006%7FB6%7Fpdf%7FEnglish%7FENG_CD_2834006_B6.pdf%7F2834006-1 TE Connectivity Buchanan WireMate connector, Poke-In series, 2-way, 4.0mm pitch, AWG18-22 (0.3255-0.823mm2), https://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Customer+Drawing%7F2834006%7FB6%7Fpdf%7FEnglish%7FENG_CD_2834006_B6.pdf%7F2834006-1 TE Connectivity Buchanan WireMate connector, Poke-In series, 1-way, 4.0mm pitch, AWG18-22 (0.3255-0.823mm2), https://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Customer+Drawing%7F2834006%7FB6%7Fpdf%7FEnglish%7FENG_CD_2834006_B6.pdf%7F2834006-1 TE-Connectivity Micro-MaTch Vertical 1-215079-0 8-215079-10 TE-Connectivity Micro-MaTch female-on-board top-entry thru-hole 12 pin 3-pin CPU fan JWT A3963, 3.96mm pitch Pin head connector (http://www.jwt.com.tw/pro_pdf/A3963.pdf connector JWT A3963 pinhead 7.25mm SMT Multi-directional Spring Contact (T+R), https://cdn.harwin.com/pdfs/S1941R.pdf spring contact emi emc shield Tag-Connect programming header; http://www.tag-connect.com/Materials/TC2030-IDC.pdf tag connect programming header pogo pins Tag-Connect programming header; http://www.tag-connect.com/Materials/TC2030-IDC-NL.pdf Tag-Connect programming header; http://www.tag-connect.com/Materials/TC2050-IDC-430%20Datasheet.pdf Tag-Connect programming header; http://www.tag-connect.com/Materials/TC2050-IDC-430%20Datasheet.pdf Tag-Connect programming header; http://www.tag-connect.com/Materials/TC2050-IDC-430%20Datasheet.pdf Tag-Connect programming header; http://www.tag-connect.com/Materials/TC2050-IDC-430%20Datasheet.pdf Tag-Connect programming header; http://www.tag-connect.com/Materials/TC2070-IDC%20Datasheet.pdf Connector XT30 Vertical PCB Female, https://www.tme.eu/en/Document/5e47640ba39fa492dbd4c0f4c8ae7b93/MR30PW%20SPEC.pdf Connector XT30 Vertical Cable Female, https://www.tme.eu/en/Document/3cbfa5cfa544d79584972dd5234a409e/XT30U%20SPEC.pdf Connector XT30 Horizontal PCB Female, https://www.tme.eu/en/Document/4acc913878197f8c2e30d4b8cdc47230/XT30UPB%20SPEC.pdf Connector XT30 Vertical Cable Female, https://www.tme.eu/en/Document/3cbfa5cfa544d79584972dd5234a409e/XT30U%20SPEC.pdf Connector XT30 Vertical PCB Female, https://www.tme.eu/en/Document/4acc913878197f8c2e30d4b8cdc47230/XT30UPB%20SPEC.pdf Connector XT30 Vertical PCB Female, https://www.tme.eu/en/Document/9b8d0c5eb7094295f3d3112c214d3ade/XT60PW%20SPEC.pdf.

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