From 85e8210d4cc2f19d786a9a10b2afc02918265e16 Mon Sep 17 00:00:00 2001 From: Frederick Yin Date: Sun, 26 Mar 2023 21:18:47 +0800 Subject: projects/reflow-workshop: 2023-03-26 update --- docs/projects/img/reflow-workshop/bicycle.jpg | Bin 0 -> 740847 bytes docs/projects/img/reflow-workshop/hotplate.jpg | Bin 0 -> 688398 bytes docs/projects/img/reflow-workshop/stencils.jpg | Bin 0 -> 1075310 bytes docs/projects/reflow-workshop.md | 60 +++++++++++++++++++++++++ 4 files changed, 60 insertions(+) create mode 100644 docs/projects/img/reflow-workshop/bicycle.jpg create mode 100644 docs/projects/img/reflow-workshop/hotplate.jpg create mode 100644 docs/projects/img/reflow-workshop/stencils.jpg diff --git a/docs/projects/img/reflow-workshop/bicycle.jpg b/docs/projects/img/reflow-workshop/bicycle.jpg new file mode 100644 index 0000000..7858214 Binary files /dev/null and b/docs/projects/img/reflow-workshop/bicycle.jpg differ diff --git a/docs/projects/img/reflow-workshop/hotplate.jpg b/docs/projects/img/reflow-workshop/hotplate.jpg new file mode 100644 index 0000000..86f6ac2 Binary files /dev/null and b/docs/projects/img/reflow-workshop/hotplate.jpg differ diff --git a/docs/projects/img/reflow-workshop/stencils.jpg b/docs/projects/img/reflow-workshop/stencils.jpg new file mode 100644 index 0000000..a378d6f Binary files /dev/null and b/docs/projects/img/reflow-workshop/stencils.jpg differ diff --git a/docs/projects/reflow-workshop.md b/docs/projects/reflow-workshop.md index ea2c638..2c275cc 100644 --- a/docs/projects/reflow-workshop.md +++ b/docs/projects/reflow-workshop.md @@ -126,3 +126,63 @@ reflow myself? Even if I can barely manage, what qualification do I have to teach other people? Perhaps I should have picked my battles and went for a simple SMD hand soldering workshop instead. That's much much easier, and I have done this three times. + +## 2023-03-22, Wednesday + +As I rose from bed I realize I could have ordered 5 stencils, and +organized two or more sessions in series. But I guess 10 is ok. Especially +when imbursement is possible. + +Was busy most of the day, and I forgot to contact that shady vendor. + +After dinner I moved what I have got so far to the hackerspace with my +bicycle. + +![Three boxes in my front basket and one big box mounted on the rack with +tape](img/reflow-workshop/bicycle.jpg) + +▲ It was a 2.5 km ride. + +In the empty hackerspace I unboxed the hotplate: + +![A black circular pad on top of a yellow metal base. On the side is +a knob](img/reflow-workshop/hotplate.jpg) + +▲ They sent along a *physical* invoice, a rare item these days + +## 2023-03-23, Thursday + +I rang 聚源鑫 to ask about the availability of ATtiny48-MU, the cheaper +alternative to 88. They don't have any. + +Now that the hope of getting chips from shady sources has vanished, +I returned to LCSC to check out their offers. They are able to act as +a broker between me and Mouser, charging 12.87 RMB apiece. Sounds good. +I ordered 20. + +## 2023-03-24, Friday + +The much awaited stencils are here! They were sandwiched between two +pieces of pretty rigid cardboard. The PCBs are in the same box. + +![Shiny stencils taped on cardboard, with black PCBs placed on +top](img/reflow-workshop/stencils.jpg) + +▲ For scale, each stencil is 5cm×5cm + +## 2023-03-25, Saturday + +The major chunk of my BOM is taken care of. Now we shall focus on the +nitty bitty discrete parts, such as capacitors and resistor packs. As +always they are extremely cheap. + +Last time I forgot to give LCSC the invoice info eligible for +reimbursement, so this time I ordered 20 more piezo speakers with the +info. Totally necessary and not abusing the hackerspace funding. + +## 2023-03-26, Sunday + +The discrete parts have arrived. + +Also I brought all the tools I have from home: multimeter, soldering iron, +solder, flux, etc. -- cgit v1.2.3