Also thanks to Mikhail Sannikov for sending an updated & colorized version of the Russian translation.
(Looking for another language? There are lots more translations here!)
The Dino-Lite Pro AM4113T 1.3MP Handheld Digital Microscope is a surprisingly handy tool for inspecting all sorts of fine details at home and on the road. The small size and light weight are ideal for travel. I keep this microscope along with several other tools in my “go box” of electronics supplies for overseas travel.
Dino-Lite offers a wide variety of digital microscopes with a similar basic design to the AM4113T but varying resolution and other features. This particular model is not cheap ($399), but the extra resolution and features of the “Premier” series scopes are handy. If you don’t need these features, there are several lower cost options available, including the lower resolution AM311S (which I have not used myself but gets generally positive reviews).
Here’s a sample image from the AM4113T (converted to jpg but otherwise unmodified):
The included Dino Capture software is surprisingly usable and allows you to take instant snapshots and videos and make a number of measurements and annotations directly within the tool (only supported on the more expensive Premier series). This is super handy for field work. For example, here’s a measurement of the angle of a USB connector relative to a PCB edge.
The USB 2.0 interface is fast and responsive which makes the critically important live preview (there is no viewfinder) a pleasure to use. There is a handy touch-activated sensor on the side of the scope for quick snapshots. (Pro-tip: mark which direction is “up” with a sharpie or you’ll get dizzy trying to orient the cylindrical scope every time you use it.)
Compared to more inexpensive USB microscopes, like the Andonstar OT-V1, the Dino-Lite offers significantly better image quality, one touch snapshots, a better focus mechanism, and better, more uniform illumination.
One disappointment is the very obvious rolling shutter, which is particularly annoying when the microscope is being used to make measurements without a stand. At this price point, I would have expected a sensor with a global shutter. Despite this limitation, the Dino-Lite AM4113T is still a very useful tool and has already helped me make some critical measurements in the field.
This 65 piece ratcheting screwdriver set is a bit nicer than comparable offerings from Dealextreme and includes bits for many of the obscure screws you are likely to encounter when disassembling all sorts of electronic equipment and devices.
I’ve used the Bus Pirate to troubleshoot tricky I2C bus problems and to develop automated testing of complex touchscreen control electronics. This is a small fraction of its capabilities. This is a handy item to have in your electronics toolbox. Has Python support!
These SMD prototyping shields from Elecfreaks are pretty useful for building and testing discrete circuits made with mostly 2 and 3-terminal surface mount devices. I’ve used them quite a bit over the past year to prototype power supply and switching circuits (mostly SOT-23s). I like to cut them into small pieces with a large metal shear and stick them to larger PCBs (the ones I’m testing/modifying) with thick double-stick foam tape.