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9.53mm 375mil 4-lead surface-mounted (SMD) DIP package, row spacing 7.62 mm (300 mils), LongPads, see https://www.power.com/sites/default/files/product-docs/lnk520.pdf Power Integrations variant of 8-Lead Plastic PSOP, Exposed Die Pad (TI DDA0008B, see http://www.ti.com/lit/ds/symlink/lm3404.pdf 8-pin HTSOP package with pin 2 and 3 https://youtu.be/frLXzG9-W3Q?t=1197 (variants, especially in the front - Clock Rate - variable resist +6k between U2-8 and U2-9 - Reset Sw - when pressed, short +12V and Reset 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 - ~27K to U3-8?

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