Download Client-Side Data Storage: Keeping It Local by Raymond Camden PDF

By Raymond Camden

The most priceless gains of today's sleek browsers is the facility to shop info correct at the user's computing device or cellular equipment. whilst extra humans circulation towards the cloud, client-side garage can nonetheless retailer net builders loads of time and cash, in the event you do it correct. This hands-on consultant demonstrates numerous garage APIs in motion. You'll learn the way and while to take advantage of them, their plusses and minuses, and steps for enforcing a number of of them on your application.

Ideal for knowledgeable net builders acquainted with JavaScript, this publication additionally introduces a number of open resource libraries that make garage APIs more straightforward to paintings with.Learn how diverse browsers aid each one client-side garage APIWork with net (aka neighborhood) garage for easy such things as lists or preferencesUse IndexedDB to shop approximately whatever you will have at the user's browserLearn how help net apps that also use the discontinued net SQL Database APIExplore Lockr, Dexie, and localForage, 3 libraries that simplify using garage APIsBuild an easy operating software that uses a number of garage innovations

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Encyclopedia of Electronic Components Volume 2 discrete semiconductor > thyristor > diac Variants • Because this circuit uses 115VAC, basic precautions should be taken. The fuse should not be omitted, the capacitor should be rated for at least 50V, and the circuit should not be touched while it is connected to the power source. Breadboarding a circuit using this voltage requires caution and experience, as wires can easily come loose, and components can be touched accidentally while they are live.

In practice, the SCR is intended to respond to a positive gate voltage. Under these circumstances, its behavior is shown by the solid curve in the top-right quadrant in Figure 1-8. The SCR begins to conduct current without having to reach the breakover voltage at the anode. • When used as it is intended, the SCR should not reach breakdown or breakover voltage levels. SCR Concept Demo In Figure 1-9, pushbutton S1 applies voltage to the gate of the SCR, which puts the SCR in selfsustaining conductive mode.

Other types of thyristor are the SCR (silicon-controlled rectifier) and the diac, each of which has its own entry in this encyclopedia. Thyristor variants that are not so widely used, such as the gate turn-off thyristor (GTO) and silicon-controlled switch (SCS), do not have entries here. OTHER RELATED COMPONENTS • SCR (see Chapter 1) • diac (see Chapter 2) What It Does The triac is ubiquitous in AC dimmers for incandescent lamps. It is also used to control the speed of AC motors and the output of resistive heating elements.

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