I know that all Tindie Blog readers meticulously calculate the type of resistors needed for a project, so this may not apply to you. If, however, you have any friends that sometimes have to fiddle around with the right resistors for a project, you might tell them about the RBOX. This clever device allows you to dial in a resistance value from 0 to 9,999,999 Ohms in single-Ohm steps, meaning that your friend can find exactly the right resistor value for a situation without plugging in and pulling individual components, or even remembering color codes.
Besides prototyping, a great application for this box could be for education, showing students the effect of changing resistances in certain applications.
Red Rocket Labs also offers similarly designed capacitor decade box available for capacitance ranges of between 100pF and 9.9999uF, and an RBOX PRO with a few upgraded features.
