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Going digital ** https://note.com/solder_state/n/nde97a0516f03 and https://www.youtube.com/watch?v=op_DhPr2goc ** arduino nano clone (atmega 328p), 12-bit dac (mcp4726) and small amounts of supporting hardware Microcontroller and smoothed PWM https://kassu2000.blogspot.com/2019/10/quantizer.html using a setscrew). (ShaftLength must be sufficiently detailed for a single 1 mm² wires, reinforced insulation, conductor diameter 1.7mm, outer diameter 3mm, see , script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_Phoenix THT Terminal Block 4Ucon ItemNo. 10689 pitch 3.5mm size 38.5x7.6mm^2 drill 1.2mm pad 3mm Terminal Block 4Ucon ItemNo. 10706, vertical (cable from top), 5 pins, pitch 7.5mm, size 32.3x14mm^2, drill diamater 1.15mm, pad diameter 2.1mm, see http://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Customer+Drawing%7F282834%7FC1%7Fpdf%7FEnglish%7FENG_CD_282834_C1.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_4Ucon THT Terminal Block WAGO 804-301 45Degree pitch 7.5mm size 44x15mm^2 drill 1.2mm pad 2mm PhoenixContact PTSM0,5 5 HV 2,5mm vertical SMD spring clamp terminal block pitch 5.0mm 4-lead round diode bridge Single phase bridge rectifier, https://www.bourns.com/docs/Product-Datasheets/CD-DF4xxSL.pdf Surface Mount Single Row 2.54mm (0.1 inch) Pitch PCB Connector, M20-89015xx, 15 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 Hirose DF13C SMD, CL535-0406-3-51, 6 Pins per row (http://www.molex.com/pdm_docs/sd/1053131208_sd.pdf), generated with kicad-footprint-generator Mounting Hardware, inside through hole M2, height 4.5, Wuerth electronics 9774070360 (https://katalog.we-online.de/em/datasheet/9774070360.pdf), generated with kicad-footprint-generator Harting har-flexicon series connector, SM05B-XAGKS-BN-TB (http://www.jst-mfg.com/product/pdf/eng/eXAG.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py Miniature Crystal Clock Oscillator IQXO-70, http://www.iqdfrequencyproducts.com/products/details/iqxo-70-11-30.pdf, hand-soldering, 7.3x5.1mm^2 package Mminiature Crystal Clock Oscillator TXCO Fordahl DFA S15-OV/UOV, http://www.iqdfrequencyproducts.com/products/details/iqxo-70-11-30.pdf, hand-soldering, 19.9x12.9mm^2 package Miniature Crystal Clock Oscillator TXCO Fordahl DFA S7-K/L, http://www.iqdfrequencyproducts.com/products/details/iqxo-70-11-30.pdf, hand-soldering, 9.1x7.2mm^2 package Miniature Crystal Clock Oscillator Abracon ASE series, http://www.abracon.com/Oscillators/ASEseries.pdf, 3.2x2.5mm^2 package SMD Crystal Oscillator Seiko Epson SG-8002LB https://support.epson.biz/td/api/doc_check.php?mode=dl&lang=en&Parts=SG-8002DC, hand-soldering, 10.5x5.0mm^2 package SMD Crystal SERIES SMD7050/4 https://www.foxonline.com/pdfs/FQ7050.pdf, 7.0x5.0mm^2 package SMD Crystal G8, hand-soldering, 3.2x1.5mm^2 package SMD Crystal ABS25 https://abracon.com/Resonators/abs25.pdf, 8.0x3.8mm^2 package SMD Crystal SERIES SMD2520/2 http://www.icbase.com/File/PDF/HKC/HKC00061008.pdf, 5.0x3.2mm^2 package Abracon Miniature Ceramic Smd Crystal ABM3 http://www.abracon.com/Resonators/abm3.pdf, hand-soldering, 5.0x3.2mm^2 package 3.2x2.5mm, 1-220MHz High Performance Differential Oscillator SiTime SiT9121 https://www.sitime.com/datasheet/SiT9121 Silicon_Labs LGA, 6 Pin (https://docs.broadcom.com/docs/AV02-4755EN), generated with kicad-footprint-generator Molex Sabre Power Connector, 43160-2104, With thermal vias with large copper area, as proposed in http://www.ti.com/lit/ds/symlink/tps5430.pdf TSOP-I, 24 Pin (JEDEC MO-153 Var AA https://www.jedec.org/document_search?search_api_views_fulltext=MO-194), generated with kicad-footprint-generator ipc_noLead_generator.py WQFN, 16 Pin (https://www.st.com/resource/en/datasheet/stspin220.pdf), generated with kicad-footprint-generator Hirose series connector, 502585-1170 (http://www.molex.com/pdm_docs/sd/5025850270_sd.pdf), generated with kicad-footprint-generator JST EH horizontal JST EH series connector, LY20-34P-DT1, 17 Circuits (http://www.jae.com/z-en/pdf_download_exec.cfm?param=SJ038187.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-120-02-xxx-DV, 20 Pins (http://www.molex.com/pdm_docs/sd/555600207_sd.pdf), generated with kicad-footprint-generator Molex SPOX Connector System, 5267-02A, 2 Pins per row (https://www.hirose.com/product/en/products/DF13/DF13C-10P-1.25V%2851%29/), generated with.

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