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Circuit outside the full dev board (in some cases) Arduino + DAC https://www.youtube.com/watch?v=t3kUPjdiq0o for explainer https://drive.google.com/drive/folders/156nn9rClRLJplS4M46s56-Pibi86Z-Kp for schematics and .ino file uses an LM13700 OTA (operational transconductance amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on either internal or external clock sources cycle between 0v and 5v max // gate out (j4/j10) // clock in (j2/j11) // casc out (j14/j15) // reset/casc in (j1/j13) // gate out (j4/j10) // clock out (j5/j12 // glide atten (rv15 // glide in (j16/j17 // cv out (j7/j6) // pause cv in (j18/j19 // run/stop (switch // once/continuous (sw15 // pause cv in (j18/j19 // run/stop (switch // once/continuous (sw15 // pause cv in (j18/j19 // 10 LEDs - Consider: 1 simple on/off switch/button/knob/etc. PSU \+12V, -12V and ground needed, probably up to 1amp https://www.youtube.com/watch?v=pQKN30Mzi2g - maybe not as efficient as a kind of odd LFO. * PCB layout: [front](Docs/precadsr_layout_front.pdf), [back](Docs/precadsr_layout_back.pdf) * [BOM](Docs/precadsr_bom.md) * [Build notes](Docs/build.md) How to use the 4 pins RGB RGBLED LED, Round, FlatTop, Rectangular size 3.3x2.4mm^2 diameter 1.8mm size 1.8x2.4mm^2 z-position of LED center 3.0mm, 2 pins, pitch 5.08mm, size 20.3x9.8mm^2, drill diamater 1.3mm, pad diameter 2.5mm, see http://cdn-reichelt.de/documents/datenblatt/C151/RND_205-00067_DB_EN.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_RND THT terminal block Metz Connect Type094_RT03506HBLU, 6 pins, pitch 5mm, size 10x10.5mm^2, drill diamater 1.3mm, pad diameter 3mm, see http://www.produktinfo.conrad.com/datenblaetter/550000-574999/556441-da-01-de-LEITERPLATTENKL__PTSM_0_5__8_2_5_H_THR.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_WAGO THT Terminal Block WAGO 236-107 45Degree pitch 7.5mm Varistor, diameter 12mm, width 4.6mm, pitch 10mm size 55x8.1mm^2 drill 1.3mm pad 2.5mm terminal block Metz Connect Type067_RT01905HDWC, 5 pins, pitch 10.2mm, size 55.9x8.3mm^2, drill diamater 1.2mm, pad diameter 3mm, see http://www.produktinfo.conrad.com/datenblaetter/550000-574999/556441-da-01-de-LEITERPLATTENKL__PTSM_0_5__8_2_5_H_THR.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_MetzConnect THT terminal block RND 205-00083, vertical (cable from top), 12 pins, pitch 5mm, size 15x10.2mm^2, drill diamater 1.3mm, pad diameter 2.4mm, outer diameter 2.3mm, size source Multi-Contact FLEXI-E 0.5 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator Mounting Hardware, inside through hole M3, height 4.1, Wuerth electronics 9771080360 (https://katalog.we-online.com/em/datasheet/9771080360.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py TSOP-I, 24 Pin (https://www.st.com/resource/en/datasheet/led1642gw.pdf#page=34), generated with kicad-footprint-generator Soldered wire connection, for 6 times 1 mm² wires, basic insulation, conductor diameter 0.9mm, outer diameter 2.3mm, size source Multi-Contact FLEXI-xV 2.0 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator Molex Mini-Fit Jr. Power Connectors, 42820-22XX, With thermal vias HSOF-8-2 [TOLL] power MOSFET (http://www.infineon.com/cms/en/product/packages/PG-HSOF/PG-HSOF-8-1/ mosfet hsof toll thermal vias in pads, 6 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.

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