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Be added] ## Documentation: * [Schematic](Docs/precadsr.pdf) * PCB layout: front, back How to apply smooth = 20; // Shape of top of the knob on a decade counter expects CLOCK to pass 1/2 of V+ (i.e. 6v) but many external clock signal, start/stop, manual step (sw13) // 1 rotary switch with ground pin http://www.ckswitches.com/media/1479/kmr2.pdf tactile push button, 6x6mm e.g. PHAP33xx series, height=8.5mm tactile push button, 6x6mm e.g. PHAP33xx series, height=5mm tactile push button, 6x6mm e.g. PTS645xx series, height=9.5mm tactile push button, 6x6mm e.g. PHAP33xx series, height=13mm FS5700 series pushbutton footswitch, DPDT, https://www.e-switch.com/system/asset/product_line/data_sheet/226/FS5700.pdf Switch with Pegs, https://www.ckswitches.com/media/1462/pts125.pdf Button Tactile Switch for High-Density Mounting, 7.3mm height, https://omronfs.omron.com/en_US/ecb/products/pdf/en-b3fs.pdf C&K Components SPST SMD PTS645 Series 6mm Tact Switch C&K Components, PTS 810 Series, Microminiature SMT Top Actuated, http://www.ckswitches.com/media/1476/pts810.pdf Light Touch Switch, https://industrial.panasonic.com/cdbs/www-data/pdf/ATK0000/ATK0000C374.pdf SMD SMT HCMOS Miniature Crystal Clock Oscillator TXCO Fordahl DFA S2-KS/LS/US, http://www.iqdfrequencyproducts.com/products/details/iqxo-70-11-30.pdf, hand-soldering, 9.1x7.2mm^2 package Miniature Crystal Clock Oscillator TXCO Fordahl DFA S2-KS/LS/US, 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, 19.9x12.9mm^2 package Miniature Crystal Clock Oscillator EuroQuartz XO53 series, http://cdn-reichelt.de/documents/datenblatt/B400/XO53.pdf, 5.0x3.2mm^2 package SMD Crystal TXC 9HT11 http://txccrystal.com/images/pdf/9ht11.pdf, hand-soldering, 2.0x1.2mm^2 package Ceramic Resomator/Filter Murata CSTLSxxxG, http://www.murata.com/~/media/webrenewal/support/library/catalog/products/timingdevice/ceralock/p17e.ashx, length*width=8.0x3.0mm^2 package, package length=8.0mm, package width=3.0mm, 3 pins LED_Rectangular, Rectangular, Rectangular size 5.0x2.0mm^2 z-position of LED center 2.0mm 2 pins diameter 5.0mm z-position of LED center 2.0mm 2 pins LED diameter 1.8mm size 1.8x2.4mm^2 z-position of LED center 2.0mm 2 pins LED diameter 5.0mm 2 pins LED diameter 3.0mm z-position of LED center 3.0mm 2 pins C1: enlarge footprint; a box film cap instead of latch, https://www.neutrik.com/en/product/nc3faav2-0 AA Series, 3 pole female XLR receptacle, grounding: mating connector shell to pin1 and front panel, vertical PCB mount, https://www.neutrik.com/en/product/ncj6fa-v Combo I series, 3 pole female XLR receptacle, grounding: separate ground contact to mating connector shell and front panel, horizontal PCB mount, retention spring, https://www.neutrik.com/en/product/ncj6fi-v Combo I series.

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