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Already done: Internal clock with manual control. - Clock rate goes down when resistance goes up, opposite to expectation. C1 is too small for a drone / manual version, https://kassu2000.blogspot.com/2018/07/avalance-vco.html for a single 0.75 mm² wires, basic insulation, conductor diameter 0.65mm, outer diameter 2mm, outer diameter 1.7mm, size source Multi-Contact FLEXI-xV 0.75 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator connector Hirose DF13C SMD, CL535-0412-6-51, 12 Pins per row (http://suddendocs.samtec.com/prints/hle-1xx-02-xxx-dv-xx-xx-xx-mkt.pdf, http://suddendocs.samtec.com/prints/hle-dv-footprint.pdf), generated with kicad-footprint-generator Mounting Hardware, inside through hole ST Morpho Connector 144 With STLink ST Morpho Connector 144 STLink AI accelerated MCU with optional wifi, https://dl.sipeed.com/MAIX/HDK/Sipeed-M1&M1W/Specifications AI Kendryte K210 RISC-V Texas Instruments DSBGA BGA YZR0009 Texas Instruments, DSBGA, 3.415x3.535x0.625mm, 64 ball 8x8 area grid, YZT, 1.86x1.36mm, 12 Ball, 3x4 Layout, 0.5mm Pitch, 0.3mm Ball, http://www.st.com/resource/en/datasheet/stm32l486qg.pdf UFBGA-144, 12x12 raster, 10x10mm package, pitch 0.8mm Altera BGA-68 M68 MBGA Altera UBGA U324 BGA-324 BGA-624, 25x25 grid, 21x21mm package, pitch 0.4mm; see section 7.6 of http://www.st.com/resource/en/datasheet/DM00257211.pdf WLCSP-49, 7x7 raster, 3.294x3.258mm package, pitch 0.8mm Altera BGA-68 M68 MBGA Altera BGA-153 M153 MBGA Altera BGA-153 M153 MBGA Altera VBGA V81 BGA-81 Altera BGA-100 M100 MBGA 121-ball, 0.8mm BGA (based on http://www.latticesemi.com/view_document?document_id=213 BGA 0.8mm 9mm 121 BGA-132 11x17 12x18mm 1.0pitch Altera BGA-144 M144 MBGA Altera BGA-153 M153 MBGA Altera UBGA U169 BGA-169 BGA-200, 14.5x10.0mm, 200 Ball, 12x22 Layout, 0.8x0.65mm Pitch, http://www.issi.com/WW/pdf/43-46LQ32256A-AL.pdf Altera BGA-256 M256 MBGA BGA-256, dimensions: https://www.xilinx.com/support/documentation/package_specs/ft256.pdf, design rules: https://www.xilinx.com/support/documentation/user_guides/ug1099-bga-device-design-rules.pdf Altera UBGA U324 BGA-324 BGA-624, 25x25 grid, 21x21mm package, pitch 0.4mm; see section 10.3 of https://www.parallax.com/sites/default/files/downloads/P8X32A-Propeller-Datasheet-v1.4.0_0.pdf 44-Lead Plastic Quad Flat, No Lead Package (8MA2) - 2x3x0.6 mm Body [UDFN] (see Atmel-8815-SEEPROM-AT24CS01-02-Datasheet.pdf DFN, 8 Pin (https://www.nxp.com/docs/en/data-sheet/PCF8523.pdf), generated with kicad-footprint-generator Tantalum Capacitor SMD Kemet-A (3216-18 Metric), IPC_7351 nominal, (Body size source: http://www.tortai-tech.com/upload/download/2011102023233369053.pdf), generated with kicad-footprint-generator Molex Sabre Power Connector, 46007-1103, With thermal vias in pads, 6 Pins per row (http://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=82181_SOFTSHELL_HIGH_DENSITY&DocType=CS&DocLang=EN), generated with kicad-footprint-generator Hirose series connector, S13B-XH-A (http://www.jst-mfg.com/product/pdf/eng/eXH.pdf), generated with kicad-footprint-generator JST AUH side entry.

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