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Another version Alternative: CV from something else VCF MK's Diode Ladder VCF Kassutronic's KS-20 https://kassu2000.blogspot.com/2019/07/ks-20-filter.html ** uses an LM13700 OTA (operational transconductance amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on SIP7, http://power.murata.com/data/power/ncl/kdc_nma.pdf Isolated 1W or 2W Single Output SM DC/DC Converters 78sr3.3 78sr5 78sr9 78sr12 78srXX DCDC-Converter, RECOM, RECOM_R-78HB-0.5, SIP-3, pitch 2.54mm, size 28.4x6.5mm^2, drill diamater 1.3mm, pad diameter 2.5mm, see http://cdn-reichelt.de/documents/datenblatt/C151/RND_205-00298_DB_EN.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_MetzConnect THT terminal block Metz Connect Type059_RT06302HBWC, 2 pins, pitch 5.08mm, hole diameter 1.3mm, wire diameter 0.5mm test point THT pad as test point, loop diameter2.6mm, hole diameter 1.2mm THT rectangular pad as test Point, diameter 2.0mm test point wire loop with bead as test point, pitch 2.54mm, size 13.16x6.5mm^2, drill diamater 1.15mm, pad diameter 3mm, see , script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_WAGO THT Terminal Block Phoenix PT-1,5-7-3.5-H, 7 pins, pitch 7.5mm, size 82.5x10.3mm^2, drill diamater 1.3mm, pad diameter 2.5mm, see http://cdn-reichelt.de/documents/datenblatt/C151/RND_205-00298_DB_EN.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_Phoenix THT Terminal Block WAGO 236-202 45Degree pitch 5mm size 242x14mm^2 drill 1.15mm pad 3mm Terminal Block WAGO 236-302 45Degree pitch 10mm size 55x10.3mm^2 drill 1.3mm pad 2.5mm terminal block Metz Connect Type073_RT02603HBLU, 3 pins, pitch 10.2mm, size 55.9x8.3mm^2, drill diamater 1.1mm, pad diameter 2.6mm, see http://www.farnell.com/datasheets/2138224.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_RND THT terminal block RND 205-00047, 4 pins, pitch 5.08mm, size 15.2x11mm^2, drill diamater 1.3mm, pad diameter 2.5mm, see http://www.metz-connect.com/de/system/files/productfiles/Datenblatt_311711_RT137xxHBWC_OFF-022811Q.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_WAGO THT Terminal Block WAGO 236-207 45Degree pitch 5mm size 35x10mm^2 drill 1.3mm pad 2.6mm Terminal Block 4Ucon ItemNo. 10690 pitch 3.5mm size 32.2x7mm^2 drill 1.2mm pad 2.4mm Terminal Block WAGO 236-512, 45Degree (cable under 45degree), 2 pins, http://www.kingbright.com/attachments/file/psearch/000/00/00/L-5603QBC-D(Ver.12B).pdf LED_Oval Oval Oval size 5.2x3.8mm^2 2 pins LED diameter 3.0mm 2 pins LED, diameter 5.0mm.

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