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Needed, probably up to 1amp - maybe not as efficient as a vendor? 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 https://www.murata.com/products/productdata/8807031865374/kdc-nxe1.pdf#page=8 https://www.murata.com/products/productdata/8807031898142/kdc-nxe2.pdf#page=9 Isolated 1W single output Power Module uPOL MUN12AD03 Meanwell DCDC non-isolated converter SIP module, http://www.meanwell.com/webapp/product/search.aspx?prod=nid30 Isolated 1W single output DC/DC Murata MGJ2DxxxxxxSC, 19.5x9.8x12.5mm, 5.2kVDC Isolated, 1W, dual output, SIP package style, https://power.murata.com/data/power/ncl/kdc_mgj2.pdf Murata MGJ3, 5.2kVDC Isolated 3W Gate Drive, 15V/5V/5V Configurable, 22.61x23.11x14.19mm, https://power.murata.com/datasheet?/data/power/ncl/kdc_mgj3.pdf Murata NCS1SxxxxSC https://power.murata.com/data/power/ncl/kdc_ncs1.pdf (Script generated with kicad-footprint-generator JST ZE series connector, B8B-EH-A (http://www.jst-mfg.com/product/pdf/eng/eEH.pdf), generated with kicad-footprint-generator Mounting Hardware, inside through hole M3, height 7.6, Wuerth electronics 9774015960 (https://katalog.we-online.de/em/datasheet/9774015960.pdf,), generated with kicad-footprint-generator ipc_gullwing_generator.py HSOP 11.0x15.9mm Pitch 0.65mm HSOP 11.0x15.9mm Pitch 0.65mm SSOP-8 2.95x2.8mm Pitch 0.65mm HSOP 11.0x15.9mm Pitch 0.65mm Slug Up (PowerSO-36) [JEDEC MO-166] (http://www.st.com/resource/en/datasheet/tda7266d.pdf, www.st.com/resource/en/application_note/cd00003801.pdf HSOP, 32 Pin (http://ww1.microchip.com/downloads/en/DeviceDoc/00002164B.pdf#page=68), generated with kicad-footprint-generator JST SUR series connector.

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