s243a added: Secondary (Rechargeable) Batteries Select between maximum runtime, long service life, small size and low cost. Rechargeable batteries play an important role in our lives and many daily chores would be unthinkable without the ability to recharge an empty battery. As the battery improves, an increasing number of devices are fitted with rechargeable batteries. The points of interest are good runtimes, economical price, long life, large loading capabilities, safe operation, ease of storage and disposal. The most common rechargeable batteries are Lead acid, NiCd, NiMH and Li-ion. Lead Acid – This is the oldest rechargeable battery system. Battery research gravitates towards lead- and lithium-based batteries. Unique packaging has made Li-ion available and affordable. Table 1: Characteristics of commonly used rechargeable batteries. Combining cobalt, nickel, manganese and aluminum raises energy density up to 250Wh/kg. Last updated 2015-08-14 *** Please Read Regarding Comments *** Or Jump To A Different Article Comments Dr wrote:
How to Build a Reciprocal Roof Frame | Reciprocal Roof Construction A reciprocal roof frame This is a long-delayed post about building my reciprocal roof frame. This entry documents the details of building my reciprocal roof frame, including the type of wood I used, the number of rafters, and the work process itself. I hope that this will be useful for individuals who want to attempt building a similar frame. With the general lack of information about reciprocal roof construction on the internet, I hope this will become a primary resource. Here we go… Raising the reciprocal roof A reciprocal roof is a beautiful and simple self-supporting structure that can be composed of as few as three rafters, and up to any imaginable quantity (within reason, of course). My Reciprocal Roof Frame Here are some specs of my reciprocal roof frame: 14 primary raftersBlack locust poles except for one pin oak (used green)All rafters have a diameter of roughly 5″ at the top end of the poles (heavy!) In total, the roof frame is composed of 28 poles. The Charlie Stick Heavy poles!
DIY Storage Shed Building Tips If your shed site slopes, pouring concrete is a bigger job because you have to build strong forms and pour extra concrete on the downhill side. A simpler method is to build your shed floor like a deck, with footings, posts and a wood frame covered by plywood. If you don't like the opening under the shed, build a skirt to cover the space between the shed floor and the ground. Since locating buried utilities is free, it doesn't make any sense to skip this step. You can avoid an expensive mistake, or worse yet, a tragedy, by going online to call811.com for more information and then calling 811 a few days before you plan to dig to have your buried utilities located.
Power Supplies - Page 4 of 18 24V SCR Battery Charger by Jim Keith | This is an extension of the earlier 12V SCR Battery Charger. It is surprisingly easy to increase the output voltage to 24V, but there are both obvious and subtle differences to consider. 12V DC to 220V AC Inverter by joribo | by Georg Böhmeke The internet is full of such schematics, so this project is nothing special. 12V DC to 220V AC Inverter Circuit by P. This is a quite simple DC to AC inverter that provides 220VAC when a 12VDC power source is provided. 12V Lead Acid Battery Low Voltage Indicator by GaryC | This is a simple circuit that will indicate a low voltage on a 12V lead acid battery. 12V to 6V Converter with 7805 or LM309 In this schematic is presented a simple 12 Volts to 6 volts converter circuit that is built with the well-known 7805 voltage regulator or the LM309 IC. MCP73826 500mA Lithium-Ion Battery Charger Battery Reverse Polarity Protection in LV Applications 3 Volts DC to 5 Volts DC Converter by T.K. by Edgefx Kits |
Brian Kerr's router lathe Brian Kerr writes: Hi Matthias, I thought you might be interested in seeing another application resulting from your gear generator. I’ve been thinking about a marble machine for a while and as part of it I wanted to have one way of lifting the marbles be done with an Archimedean screw. For that and other projects I wanted to make a machine that would cut helical spirals. At first I considered a separate machine using the same small router I have for the 3D pantograph from your design. Here’s the finished jig – or at least the first prototype: Headstock attachment point. It attaches to the tailstock end using threaded holes intended for an extension bed. The “carriage” for the router rides on metal electrical conduit pipes – straight and inexpensive. The first layer on top of the carriage is the “coarse” setting for the diameter of the blank. The next level is a rotatable piece which will allow the router bit to enter at an angle if the project requires. Matthias commets: See also:
Ford Galaxie The Galaxie was the high volume counterpart to the Chevrolet Impala. Some Galaxies were high-performance, racing specification machines, a larger forebear to the muscle car era. Others were plain family sedans. The 1966 four-door sedan version of this car was also produced in Brazil under the names Galaxie, Galaxie 500, LTD and Landau from 1967 to 1983. The similarly named Ford Galaxy is a large car/minivan available in the European market. 1959[edit] See also 1959 Ford Among the models was the Skyliner, featuring a retractable hardtop that folded down into the trunk space; this feature, impressive but complicated, expensive and leaving very little trunk room when folded down, did not last long, being produced from 1957 through 1959. A fixture also was the previous year's 352 V8, still developing 300 horsepower (220 kW). 1960–1964[edit] Ford Galaxie 500 1962 Ford Galaxie 500 1964. See also 1960 Ford For 1961, the bodywork was redone again, although the underpinnings were the same as in 1960.
Series and parallel wiring: Successfully compounding amps and volts by Rex A. Ewing from the January/February, 2006 issue of Countryside & Small Stock Journal - Countryside Magazine When I began putting together my first solar electric system way back in the last century, I soon noticed there was an easy part and a hard part to the installation. The initial tasks-welding the heavy steel frames for the solar panels, digging and pouring the concrete foundation piers, mounting the frames and the panels, building a battery box from plywood and 2 x 4s and lifting in and arranging the octet of 80-pound batteries-all fell into the easy category. The hard part came when I had to figure out how to wire eight 6-volt batteries and six 12-volt solar panels for 24-volt operation. Up to that time my most noteworthy accomplishment with DC electricity was rewiring the lights and brakes on an old horse trailer, after my new puppy had endeavored to sate her chewing urge on the original wiring. Frankly, I was beginning to think I was in over my head. In the end-when I got the system up and running without frying any solar panels or blowing up any batteries-it all made perfect sense.
Downloads Collected on this page are all of the downloads for the clocks. This includes the drawings for the clocks in PDF format which are available for free. Simply click on the highlighted link under Free Files. You will need to have Adobe Acrobat loaded for the files to be opened so if you don’t have it you will need to get it loaded. You will need to wait a few seconds for anything to appear but be patient it will appear. The premium files are arranged under the clock headings and offerings vary for each clock. To obtain the files click on the PayPal button which will take you to a PayPal page which will give you the opportunity to pay either by PayPal or Credit Card. Having completed the details you should be taken to a page from which you can download the files. I should in fairness point out that these clocks are not easy to build and can be a challenge, particularly if you don’t have all the kit needed to build them. For more free files go to the Projects Tab Materials source McMaster-Carr
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