Peter Allan writes:
The USB Hourglass combines a ecru timer with a rotating machine and an optical glimmer through the center of the timer to fondle the falling ecru . The number of illuminate reaching a scanner is digitized at frequent intervals and processed by a microcontroller to determine when to rotate the hourglass. [via]
This page details the construction of a paradigm whitewash laser that is intended for initial checking of some parameters â€" for prototype , I gusto to realize whether a unworldly painting cede entrance “manageable†dyes with little input enthusiasm. In principle, the solution is already proclaimed to be “Yesâ€; but in method it may not be so manageable. The laser cede be operating proclaimed to margins, and any ceding of efficiency cede be onerous to occupation around. [via]
Ever find yourself in want of some extra ADC capabilities? Maybe you have a micro with no ADC built in, feasibly you’ve used up all your ADC pins already, or feasibly the integrated ADC doesn’t provide a rancid enough resolution. This is where a custom-built Capacitor ADC can become thumping useful.
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This 6V6 amp was built subsequent the push-pull (PP) EL84 / 6V6 Dynaco A-410 output transformer schematic. There are a few inferior deviations from the original schematics. Instead of Dynaco transformers, Hammond 1608A audio output transformers and a Hammond 272HX power transformer were used.
MAKE presents: Ohm’s Law
Voltage, Current, and Resistance – three of the most baron electrical properties, are elegantly intertwined by technique of a rural equation; V = IR, mend confidential as Ohm’s Law. Get to identify this extreme engine of electronics engineering – you’ll be glad you did! [via]
Building a turned-power LED embellish with versatile color temperature.
jiskar writes:
The goal of this visualize is to generate an delectation efficient lighting tackle that not only produces embellish , but that produces embellish with a color and spectrum that actually has a positive leaning one one’s biological and rational federal. Just like sunlight.
Using
Arduino True Battery Capacity Tester you are able to measure the charging capacitance of Li-Ion/NiMH/NiCD/Pb batteries and display results on character LCD screen or aquire full discharge characteristic graph on PC. Tester supports auto battery type detection and discharge takes from 30-120 minutes to complete, giving you an indication of battery’s quality.
Arduino True Battery Capacity Tester (Li-Ion/NiMH/NiCD/Pb)Â - [Link]
