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BackPackage, 3.3x3.3x0.8mm Body, https://www.diodes.com/assets/Package-Files/PowerDI3333-8.pdf Fairchild Power33 MOSFET package, TDSON-8-1, 5.15x5.9mm (https://www.infineon.com/cms/en/product/packages/PG-TDSON/PG-TDSON-8-1/ TO-50-3 Macro T Package Style M236 TO-50-4 Macro X Package Style M236 TO-50-4 Macro X Package Style M238 TO-252 / DPAK SMD package, http://rohmfs.rohm.com/en/techdata_basic/ic/package/hrp7_1-e.pdf, http://rohmfs.rohm.com/en/products/databook/datasheet/ic/motor/dc/bd621x-e.pdf SC-59, hand-soldering varaint, https://lib.chipdip.ru/images/import_diod/original/SOT-23_SC-59.jpg SOT, 3 Pin (https://www.jedec.org/system/files/docs/to-236h.pdf variant AB), generated with kicad-footprint-generator Soldered wire connection with double feed through strain relief, for a clock on the front Don't put R8 so close to R26 - D36/R47 too close Testing before powering up: Clock In - U1-13 (can get at from top when assembled Stop Switch - 10 ohms between U1-14 and U2-1 when off, more like 1M ohms when off Glide In - U1-13 (can get at from top when assembled Stop Switch - 10 ohms between U1-14 and U2-1 when off, more like 1M ohms when off - Single Step - 12V through 10k Ohms to U-1-14, more like 1M when off Single Step - 12V through 10k Ohms to U-1-14, more like 1M when off - Glide attenuator (B10k) (join two left pins from below Clock rate goes down when resistance goes up, opposite to expectation. Schematic fixes: - C1 is too small for film; is film needed? More notes Schematics/schematic_bugs_v1.txt | 2 | 1N5817 | Schottky diode | | | | Tayda | A-2939 | | | | | U2 | 1 | SW_Push | Push button switch OFF-(ON CMOS General Purpose Timer, 555 compatible, PDIP-8 0.2A Ic, 40V Vce, Small Signal NPN Transistor.
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