<div dir="auto">If I'm etching the board myself, then 0603 and 0.5mm QFP is the general limit (I have done 0402 and 0.4mm once, but the 0.4mm wasn't perfect).<div dir="auto"><br></div><div dir="auto">If the board is made professionally (with a stencil), then 0402, QFN and 0.4mm is fine - but I do have a manual pick and place machine and a reflow oven.</div><div dir="auto"><br></div><div dir="auto">My current project is a mini-itx motherboard, which I did the first prototypes in December. Only manufacturing failure was a 0.5mm DFN that had too much paste.</div><div dir="auto"><br></div><div dir="auto">BGA not had to use yet, but I have designed some boards for such FPGAs.</div><div dir="auto"><br></div><div dir="auto">Still don't like SOT-523 though.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, 13 Jan 2022, 23:49 cheater cheater via Synth-diy, <<a href="mailto:synth-diy@synth-diy.org">synth-diy@synth-diy.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Speaking of low power parts, I wonder one thing. What are everyone's<br>
absolutely smallest "useable for synths" parts? Mainly I mean:<br>
- op amps<br>
- transistors (bjt or fet)<br>
- VCAs (if at all??)<br>
- linear and switching voltage regulators<br>
- other semiconductors you deem relevant<br>
<br>
I'm hoping for stuff like BGA or even flip chip, literally grains of sand.<br>
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