Shared Projects by AVB

A mini reference board featuring mounting holes of the smaller sizes included in KiCAD 4.0.6. This includes holes only up to 4mm diameter, and only the _Pad variant, but it will do just fine if you intend to use screws in the same size range as standard PC hardware screws, and it’s cheap.

Includes: 2.2mm, 2.5mm, 2.7mm (M2.5), 3mm, 3.2mm (M3), 3.5mm, 3.7mm, 4mm.

In case you really need all the hole sizes, I also have a bigger reference board, but that one is expensive.

A reference board featuring mounting holes of various sizes included in KiCAD 4.0.6. This includes a lot of holes, including the big ones, so it is rather expensive.

Includes: 2.2mm, 2.5mm, 2.7mm (M2.5), 3mm, 3.2mm (M3), 3.5mm, 3.7mm, 4mm, 4.3mm (M4), 4.5mm, 5mm, 5.3mm, 5.5mm, 6mm, 8.4mm (M8).

Each hole is included as its default, Pad, and Pad_Via versions.

I also have a mini reference which is cheaper but should still suffice for most projects.

Sixteen-key matrix keypad of TL3342-like switches.

You could make a keypad in your sleep. It is not difficult. The real problem is, you will be asleep by the time it is finished, because wiring one up manually is dull and repetitive. You could save yourself a lot of time and buy a keypad from Adafruit or Sparkfun; it would be cheaper and better. But what if, for some strange reason, you still want a keypad that calls for an exercise in reflow soldering? Fine, here you go.

You will need sixteen TL3342 (or equivalent) pushbutton switches, some good (not bad) solder paste, solder paste stencil, and a reflow setup of some sort. The gerber file for the stencil is included in the archive (file name is “keypad4x4-F.Paste.gbr”) and you can order it from OSH Stencils (they do not have a sharing feature at this time, unfortunately.) You could solder the pushbutton switches with a soldering iron, too, but it would be nearly as boring as wiring it up manually. If you intend to plug it into a breadboard, you will also need an eight-pin, 2.54mm-pitch, one-row header.

Pushing those tiny buttons with your fingers can be a pain, which is why I created this enclosure: Keypad, 4x4, Enclosure You will need some 3/8" #4-40 screws and a bunch of washers to assemble it together.

Designed with KiCAD Version 4.0.6.

A simple “astable multivibrator” circuit designed for testing SMD stencil techniques and SMD soldering techniques. Requires two transistors (ST2222 or equivalent, SOT-23,) two LEDs (0805,) two capacitors (0603,) and four resistors (also 0603.) Touch 9V battery to exposed pads on opposite side to test assembled circuit.

Using 1uF capacitors, 1k resistors, and 1M resistors, the LEDs blink rapidly, but not rapidly enough to call it flickering.

Two-layer board. Designed with KiCAD.

A simple “astable multivibrator” circuit designed for testing through-hole soldering techniques. Requires two transistors (2N2222 or equivalent, TO-92,) two LEDs, two capacitors, four resistors, and a 9V battery clip. Connect battery to test assembled circuit.

Using 1uF capacitors, 1k resistors, and 1M resistors, the LEDs blink rapidly, but not rapidly enough to call it flickering.

Two-layer board. Designed with KiCAD.