Miscellaneous

One of these articles is not like the others.
One of these articles just doesn't belong.

Sometimes a Robot Room article doesn't fit in any of the other major categories that are used to navigate the website. When that happens, the article ends up here. In the event that enough articles merit a new category, they will disappear from here and move somewhere else.

Pile of multimeters Multimeter Reviews
A digital meter is an essential tool for all robot builders and electronic hobbyists. If you're just starting out, can you buy the least expensive model and still get accurate results? How much do you need to spend to get a decent mid-range model? A dozen multimeters are tested and compared.
Multimeter measuring resistance in ohm mode How to Measure Low Resistances
Occasionally you'll run across electronics such as relays, cables, igniters, switches, or current-sense resistors that have resistances less than one ohm. Few multimeters accurately measure less than 1 Ω, but most have a millivolt mode that can be combined with a 5 V source, a fixed resistor, and some simple math to determine milliohm resistances.
Camera mounted horizontally for overhead macro shot Macro Photography
Taking a picture of an electronic part, circuit board, or other small object is much easier if you have the right setup. This includes a DIY remote shutter release, desk lamp ring light, and horizontal tripod arm. Take a peek at the Robot Room digital camera setup.
Parachute and rocket nose cone sticking out of a tree branch How to Get a Model Rocket Out of a Tree
Oh no! A rocket has gotten stuck in a tree branch approximately 36 feet off the ground. How can it be rescued? With bamboo poles? A novelty party balloon with fishing line? Or a coat hanger hook with a boring conventional ladder? Find out!
Walled-in playing field for a robot contest Building a Robot Contest Arena
Constructing a playing field for robots is much harder than it seems. Here are some tips for cutting wood boards, machining retention lips for scoring areas, chiseling notches, connecting wall together, and filling gaps.
DAC is a hexadecimal number Digital Number Systems
Whether you're working on robots, digital circuits, software, or microcontrollers, you'll encounter numbers that aren't decimal. This tells you how to convert a number to and from hexadecimal, binary, octal, and decimal.
Brian Damaged Safety Signs
Whether you are a fan of slapstick or just have secret schadenfreude, these are standardized workplace signs that are amazing effective at grabbing your attention so that a piece of equipment doesn't grab you.
Storm Impact logo Storm Impact
Before there was Robot Room, David Cook authored a number of video games and utilities for the Apple Macintosh computers, such as TaskMaker, MacSki, Asterbamm, Tomb of the TaskMaker, and Technical Snapshot.