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BGA-64, 10x10 raster, 4.201x4.663mm package, pitch 0.4mm; see section 7.6 of http://www.st.com/resource/en/datasheet/stm32f429ng.pdf UFBGA-201, 15x15 raster, 10x10mm package, pitch 0.4mm; see section 6.3 of http://www.st.com/resource/en/datasheet/stm32f746zg.pdf WLCSP-144, 12x12 raster, 7x7mm package, pitch 0.4mm; https://www.latticesemi.com/view_document?document_id=213 UFBGA-15, 4x4, 3x3mm package, pitch 0.4mm; see section 7.4 of http://www.st.com/resource/en/datasheet/stm32l476me.pdf WLCSP-81, 9x9 raster, 4.039x3.951mm package, pitch 0.4mm; see section 6.3 of http://www.st.com/resource/en/datasheet/stm32f469ni.pdf WLCSP-180, 13x14 raster, 5.537x6.095mm package, pitch 0.4mm pad, based on either internal or external clock sources cycle between 0v and 5v or even much less. - One potentiometer for internal clock rate. Switches: Momentary-normal-off pushbutton to manually reset. - One SPDT switch per step, to enable/disable gate per step. (10 One potentiometer per step, to set clock rate (if onboard clock is used // 11 SPDT switches.

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