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/diy/ - Do It Yourself

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>> No.1530399 [View]
File: 307 KB, 1508x1136, getting there.png [View same] [iqdb] [saucenao] [google]
1530399

Freq-splitter / retarded PCB making anon here, I'm almost done designing this thing and it will fit on the 150x150mm piece of double-sided copper I have here, thanks to the suggestion of wrapping it around on itself. I just followed what made sense for what modules were on each side of the inverters, which I think ended up looking all right. The ground fill is a fucking mess though, had to run a bunch of extra traces to carry ground continuity from one zone to another, though I arranged some jumper thru-holes such that I didn't need any vias. Now all that's left is to finish wiring up the clock circuitry and pretty it all up.

>>1530390
Assume a minimum hFE. 50 or so usually does it, though you may want to assume lower if your transistors are particularly wimpy. Then take your maximum possible collector current, divide it by this minimum hFE, and you've got your base current. Or, you know, use a MOSFET.

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