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Back[PATCH] Notes from MK's PCB livestream Footprints: - avoid non-circular holes in footprints whenever possible; some fabs charge more for ovals avoid non-circular holes in footprints whenever possible; some fabs charge more for ovals - make power connection traces larger; MK uses a ground plane on only one tl074 and support 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 https://www.analog.com/media/en/technical-documentation/data-sheets/8063fa.pdf Altera BGA-36 V36 VBGA BGA-48 - pitch 0.8 mm BGA-64, 10x10 raster, 8x8mm package, pitch 0.5mm; see section 7.5 of http://www.st.com/resource/en/datasheet/stm32l476me.pdf WLCSP-81, 9x9 raster, 4.4084x3.7594mm package, pitch 0.4mm; see section 7.2 of http://www.st.com/resource/en/datasheet/stm32f207vg.pdf WLCSP-66, 8x9 raster, 3.767x4.229mm package, pitch 0.4mm; see section 7.1.1 of http://www.st.com/resource/en/datasheet/stm32f401ce.pdf WLCSP-49, 7x7 raster, 3.294x3.258mm package, pitch 0.4mm; http://ww1.microchip.com/downloads/en/devicedoc/atmel-8235-8-bit-avr-microcontroller-attiny20_datasheet.pdf#page=208 WLCSP-16, 1.409x1.409mm, 16 Ball, 4x4 Layout, 0.5mm Pitch, https://www.st.com/resource/en/datasheet/stm32wl54jc.pdf ST UFBGA-121, 6.0x6.0mm, 121 Ball, 11x11 Layout, 0.5mm Pitch, S-PWSON-N10, DSC, http://www.ti.com/lit/ds/symlink/tps63060.pdf USON-10 2.5x1.0mm_ Pitch 0.5mm right angle (http://www.molex.com/pdm_docs/sd/467651301_sd.pdf hdmi micro type d right angle DPDT push button (https://www.alps.com/prod/info/E/PDF/Tact/SurfaceMount/SKRT/SKRT.pdf push horizontal SPST 1P1T tactile switch Omron B3F right angle tht HDMI, Micro, Type D, THT, 0.4mm pitch, 19 ckt, right angle USB type A, Horizontal, https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=292303&DocType=Customer+Drawing&DocLang=English USB A connector https://www.we-online.com/catalog/datasheet/614004134726.pdf Stacked USB A connector https://belfuse.com/resources/drawings/stewartconnector/dr-stw-ss-52100-001.pdf USB type A, Horizontal, https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=292303&DocType=Customer+Drawing&DocLang=English USB A connector http://katalog.we-online.de/em/datasheet/61400826021.pdf A,phenol MUSB_D511, USB B receptable with flange, https://cdn.amphenol-icc.com/media/wysiwyg/files/drawing/10118193.pdf Dustproof Micro USB Typ-B (http://www.molex.com/pdm_docs/sd/1051330031_sd.pdf Micro USB Typ-B (http://www.molex.com/pdm_docs/sd/1051330001_sd.pdf Micro-USB SMD Typ-B GCT Molex Vertical Micro USB B receptacle horizontal through-hole GCT USB1046, USB Type C, Right Angle, Surface Mount Single Row 2.54mm (0.1 inch) Pitch PCB Connector, M20-89019xx, 19 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 StandardBox.py) (https://product.tdk.com/info/en/document/catalog/smd/inductor_commercial_power_slf7032_en.pdf Inductor, TDK, SLF6028, 6.0mmx6.0mm (Script generated with kicad-footprint-generator Mounting Hardware, inside through hole 2.25mm, height 6, Wuerth electronics 9774015360 (https://katalog.we-online.de/em/datasheet/9774015360.pdf), generated with kicad-footprint-generator Molex Sabre Power Connector, 43160-0103, With thermal vias in pads, 5 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 Tantalum Capacitor SMD Kemet-R (2012-12 Metric), IPC_7351 nominal, (Body size source: IPC-SM-782 page 72, https://www.pcb-3d.com/wordpress/wp-content/uploads/ipc-sm-782a_amendment_1_and_2.pdf), generated with kicad-footprint-generator Soldered wire connection with feed through.
- 7.62mm, hole diameter 1.5mm.
- -8.701189e-001 0.000000e+000 vertex -5.274917e+000 1.974161e+000 2.496000e+001 vertex -3.012618e+000.