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20 pin connector, https://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Customer+Drawing%7F215079%7FY1%7Fpdf%7FEnglish%7FENG_CD_215079_Y1.pdf%7F215079-4 connector TE-Connectivity Micro-MaTch female-on-board top-entry thru-hole 8 pin connector, https://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Customer+Drawing%7F215079%7FY1%7Fpdf%7FEnglish%7FENG_CD_215079_Y1.pdf%7F215079-4 connector TE-Connectivity Micro-MaTch Vertical 1-215079-4 8-215079-14 TE-Connectivity Micro-MaTch Vertical 215079-4 7-215079-4 TE-Connectivity Micro-MaTch Vertical 215079-8 7-215079-8 USB 3.0, type A, right angle right angle USB3 type A right angle tactile switch SPST LED OFF-ON D Single Pole Single Throw (SPST) switch with LED, generic K switch normally-open pushbutton push-button Side push button https://www.e-switch.com/system/asset/product_line/data_sheet/210/800U.pdf CuK miniature slide switch, EG series, DPDT, http://spec_sheets.e-switch.com/specs/P040047.pdf E-Switch slide switch, EG series, SPDT, right angle, http://spec_sheets.e-switch.com/specs/P040170.pdf Switch, single pole double throw, separate symbols 2x5 pin shrouded header 2.54 mm spacing KK254 Molex header Small Signal NPN Transistor, TO-92 R16, R17, R19, R20 | 4 Docs/precadsr_bom.md | 3 pin Molex connector 2.54 mm spacing | | U2 | 1 Consider replacing transistor through-holes with sockets or with a diode matrix to select segments from each step. UI: One potentiometer per step, to enable/disable gate per step. (10 One SPDT switch to disable clock (pause). .

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