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A CA3080 OTA, an expensive and rare chip these days ($3/ea on amazon, maybe fakes) VCA MK's VCA Probably a straightforward build: one op-amp, four transistors and some example modules Latest commits for file Schematics/OttosIrresistableDance/OttosIrresistableDance.kicad_pcb b0f8ee4ade Go to file 5e32fb4fc0 Change transistor footprint to inline_wide, fix DRC ground Fireball/Fireball.kicad_pro | 104 Fireball/Fireball.kicad_sch | 64 Fireball/fp-info-cache | 86150 master ttrss-plugin- _comics/init.php 264 lines define('ADD_IDS', True); class _comics extends Plugin { function get_img_tags($xpath, $query, $article){ $new_src = $this->rel2abs($orig_src, $article['link']); if ($alt_text && !$title_text){ $text_element = $doc->createElement("i", $alt_text); } elseif ($title_text && !$alt_text){ $text_element = $doc->createElement("i", $title_text); $para_element->appendChild($title_element); } 0 0 Y N 1 F N DEF SW_Push_Open_Dual_x2 SW 0 1 Y Y 1 F N DEF SW_SPDT SW 0 40 Y N 1 F N DEF Synth_power_2x5 J 0 40 Y Y 1 F N DEF SW_DIP_x10 SW 0 40 Y N 1 F N DEF SW_SP3T SW 0 0 Dual VCA, based roughly on Moritz Klein's work, but with an eye towards doing it all in one module with WiFi, https://www.adafruit.com/product/2471 Arduino UNO R2, http://www.mouser.com/pdfdocs/Gravitech_Arduino_Nano3_0.pdf Arduino UNO R3, http://www.mouser.com/pdfdocs/Gravitech_Arduino_Nano3_0.pdf 8devices Carambola2, OpenWRT, industrial SoM computer, https://www.8devices.com/media/products/carambola2/downloads/carambola2-datasheet.pdf Pololu Breakout 16-pin 15.2x20.3mm 0.6x0.8\ Raspberry Pi Zero using through hole M3, height 7.6, Wuerth electronics 9774040482 (https://katalog.we-online.de/em/datasheet/9774040482.pdf), generated with kicad-footprint-generator Soldered wire connection with double feed through strain relief, for 2 times 2.5 mm² wires, reinforced insulation, conductor diameter 0.65mm, outer diameter 2mm, outer diameter 3.9mm, size source Multi-Contact FLEXI-2V 0.25 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator ipc_gullwing_generator.py LQFP, 48 Pin (JEDEC MO-153 Var AD https://www.jedec.org/document_search?search_api_views_fulltext=MO-153), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-130-02-xx-DV-TE, 30 Pins (http://www.molex.com/pdm_docs/sd/529910308_sd.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py TSSOP, 14 Pin (http://www.st.com/resource/en/datasheet/lsm6ds3.pdf), generated with kicad-footprint-generator Mounting Hardware, inside through hole M2, height 1, Wuerth electronics 9774110960 (https://katalog.we-online.de/em/datasheet/9774110960.pdf,), generated with kicad-footprint-generator Mounting Hardware, inside blind hole M1.6, height 6, Wuerth electronics 9776070960 (https://katalog.we-online.com/em/datasheet/9776070960.pdf), generated with kicad-footprint-generator JST VH.

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