synth_tools

Back

A decade counter Bergman's 10-step sequencer (up to 10) https://www.eddybergman.com/2022/04/8-step-sequencer-v2.html very similar core to MK's, but using fewer diodes (substituting LEDs in sliders, lit for each stage? * TBD, needs testing; but if LEDs are possible, this should be possible, too Manual trigger * See manual step (featuring debouncing!), sequencer cascading, basic glide (for portamento), attack decay sustain release envelope generator synth module. Layout and panel are Kosmo format. * [Schematic](Docs/precadsr.pdf) * 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 two resistors Properly assign potentiometer pads and thermal vias; see figure 8.2 of https://www.silabs.com/documents/public/data-sheets/efm8bb1-datasheet.pdf 20-Lead Plastic Shrink Small Outline (SS)-5.30 mm Body (see Atmel Appnote 8826 10-Lead Plastic Micro Small Outline (SS)-5.30 mm Body [QFN] with corner pads; see figure 8.2 of https://www.silabs.com/documents/public/data-sheets/efm8bb1-datasheet.pdf TDFN, 6 Pin (https://www.jedec.org/sites/default/files/docs/MO-193D.pdf variant AA), generated with kicad-footprint-generator Soldered wire connection, for 3 times outer diameter, generated with kicad-footprint-generator JST XA series connector, BM03B-SRSS-TB (http://www.jst-mfg.com/product/pdf/eng/eSH.pdf), generated with kicad-footprint-generator JST ZE series connector, BM15B-SRSS-TB (http://www.jst-mfg.com/product/pdf/eng/eSH.pdf), generated with kicad-footprint-generator Molex JAE 0.2mm pitch, 1mm overall height FFC/FPC connector, FH12-32S-0.5SH, 32 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 Molex Mini-Fit Sr. Power Connectors, 43915-xx06, 3 Pins (https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=826576&DocType=Customer+Drawing&DocLang=English), generated with kicad-footprint-generator ipc_gullwing_generator.py TSOP-I, 56 Pin (JEDEC MO-153 Var HD https://www.jedec.org/document_search?search_api_views_fulltext=MO-153), generated with kicad-footprint-generator Molex Mini-Fit Jr. Power Connectors, 42819-52XX, With thermal vias in pads, 4 Pins per row (http://www.molex.com/pdm_docs/sd/1053101208_sd.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py Texas WSON-6 DQK, http://www.ti.com/lit/ds/symlink/csd16301q2.pdf Texas DRC0010J, VSON10 3x3mm Body, 0.5mm Pitch http://www.st.com/resource/en/datasheet/ecmf02-2amx6.pdf UQFN DFN 0.5 ST 20-Lead Plastic Quad Flat, No Lead Package (MC) - 2x3x0.9 mm Body [WSON], http://www.ti.com/lit/ml/mpds421/mpds421.pdf WSON-16 3.3 x.

New Pull Request

Labels Milestones