You've probably seen firsthand how a spring responds to force. If you press down on a spring, it expands to its original shape when you let go. The same thing happens if you pull its ends in opposite directions. This is because of the spring's elastic potential energy -- the energy ...
Blackjack is one of the easiest casino games to learn and with a little help from me, you can become a blackjack pro in minutes. Once you’re an expert, you’ll be ready to play one of the world most exciting card games in casinos or online with virtually no house edge. *double fis...
The communications control is battery-powered and can be switched from intercom to transmit functions. You can either push to talk and release to listen or have a continuously open communication line. To talk with spacewalkers, the system uses a UHF frequency, which is picked up in the ...
Resistor R1 on jack 1 is the 'input resistor.' It sets the amp's input impedance to 1,000,000 ohms (1M) to boost the signal voltage from the guitar. [Bonus info: R1 also functions as the 'grid leak' resistor for Tube V1A's grid. A grid leak drains off unwanted DC voltage to ...
One of the most common power connectors used on a finished PCB, in both consumer electronics and hobby electronics alike, is the barrel connector, also know as a barrel jack. These can vary in size, but they all function the same and provide a simply, reliable way to power your project....
bookshelf speakers have a built-inamplifierand a long jack lead, so you can plug them into aCD player,MP3 player,computer, or anything else with a standard headphone socket. They pack quite a punch for something so tiny because they have a reasonably high sensitivity, which is explained ...
PV solar panelsworkwith one or more electric fields that force electrons freed by light absorption to flow in a certain direction. This flow of electrons is a current, and by placing metal contacts on the top and bottom of the PV cell, we can draw that current off for external use. This...
In a gasoline engine, the fuel-air mixture is compressed to about a tenth of its original volume. But in a diesel engine, the air is compressed by anything from 14 to 25 times. [1] If you've ever pumped up a bicycle tire, you'll have felt the pump getting hotter in your hands ...
Up-to-date styling, an improved chassis and a modern overhead-valve V-8 highlighted Pontiac's 1955 lineup. The 1955 Pontiac Star Chief is shown here. Except for larger, taller grille teeth and reshuffled trim, the 1950 models were predictably much like the '49s. However, the long-runnin...
However, a summer power outage carries its own set of problems. Foremost are heat-related illnesses and the higher potential of spoilage for your food. Even if you aren’t convinced that hardcore preparedness is for you, it would still be difficult to argue against the possibility of a disast...