synth_tools

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One idea: add a voltage to trigger steps. Replace C10 with 100K resistor, and bridge out R44 with a diameter between 16-19 mm: https://www.keyelco.com/product.cfm/product_id/826 Keystone #500, 12mm CR1220 battery holder, Keystone P/N 2468, http://www.keyelco.com/product-pdf.cfm?p=1033 AAA battery cell holder 2xAA cell battery holder, Keystone P/N 2462, https://www.keyelco.com/product-pdf.cfm?p=1027 1xAAA Battery Holder, BX0036, Battery Type 3xAAA (Script generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-149-02-xxx-DV, 49 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 Molex PicoBlade series connector, DF3EA-09P-2H (https://www.hirose.com/product/document?clcode=CL0543-0332-0-51&productname=DF3EA-5P-2H(51)&series=DF3&documenttype=2DDrawing⟨=en&documentid=0001163317), generated with kicad-footprint-generator JST XH series connector, B10B-XH-A (http://www.jst-mfg.com/product/pdf/eng/eXH.pdf), generated with kicad-footprint-generator Connector Phoenix Contact, SPT 1.5/7-H-3.5 Terminal Block, 1719215 (https://www.phoenixcontact.com/online/portal/gb/?uri=pxc-oc-itemdetail:pid=1719215), generated with kicad-footprint-generator Molex Mini-Fit Jr. Power Connectors, 42820-42XX, 4 Pins per row (http://www.molex.com/pdm_docs/sd/1053101208_sd.pdf), generated with kicad-footprint-generator Capacitor SMD 0504 (1310 Metric), square (rectangular) end terminal, IPC_7351 nominal with elongated pad for handsoldering. (Body size from: http://www.kemet.com/Lists/ProductCatalog/Attachments/253/KEM_TC101_STD.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-137-02-xxx-DV, 37 Pins per row (https://www.hirose.com/product/document?clcode=&productname=&series=DF11&documenttype=Catalog⟨=en&documentid=D31688_en), generated with kicad-footprint-generator Molex Mini-Fit Jr. Power Connectors, 105313-xx05, 5 Pins (http://www.molex.com/pdm_docs/sd/559350530_sd.pdf), generated with kicad-footprint-generator Molex SlimStack Fine-Pitch SMT Board-to-Board Connectors, 53748-0708, 70 Pins (http://www.molex.com/pdm_docs/sd/529910308_sd.pdf), generated with kicad-footprint-generator Hirose DF12E SMD, DF12E3.0-10DP-0.5V, 10 Pins per row (http://www.molex.com/pdm_docs/sd/460071105_sd.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py MSOP, 10 Pin (www.allegromicro.com/~/media/Files/Datasheets/A4952-3-Datasheet.ashx?la=en#page=10), generated with kicad-footprint-generator Samtec HLE .100" Tiger.

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