Starting Electronics (3rd Edition) by Keith Brindley

By Keith Brindley

Beginning Electronics is unrivalled as a hugely functional advent for hobbyists, scholars and technicians. Keith Brindley introduces readers to the capabilities of the most part varieties, their makes use of, and the elemental rules of creating and designing digital circuits.

Breadboard layouts make this greatly a ready-to-run booklet for the experimenter; and using multimeter, yet no longer oscilloscopes, places this useful exploration of electronics close by of each domestic enthusiast's pocket.

The 3rd version has saved the simplicity and readability of the unique. New fabric contains sections on transducers and more effective examples of electronic ICs.• A punchy, sensible creation to self-build electronics
• the appropriate start line for domestic experimenters, technicians and scholars who are looking to strengthen the true hands-on abilities of electronics construction
• Circuits use breadboards, a multimeter and greatly on hand elements, making them obtainable to the first-time electronics experimenter

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Extra info for Starting Electronics (3rd Edition)

Example text

We’ll start our study, this chapter, with a brief recap of the ideas we covered in the last chapter. We saw then that resistors in series may be considered as a single equivalent resistor, whose resistance is found by adding together the resistance of each resistor. This is called the law of series resistors, which is given mathematically by: Similarly, there is a law of parallel resistors, by which the single equivalent resistance of a number of resistors connected in parallel is given by: Using these two laws many involved circuits may be broken down, step by step, into an equivalent circuit consisting of only one equivalent resistor.

Not end-to-end as series joined resistors are, but joined at both 44 On the boards ends. We say resistors joined together at both ends are in parallel. 8 shows a breadboard layout. Both these resistors are, again, 10 k resistors. What do you think the overall resistance will be? It’s certainly not 20 k! Measure it yourself using your multi-meter and breadboard. You should find that the overall resistance is 5 k. Odd, eh? Replace the two 10 k resistors with resistors of different value say, two 150 Ω resistors (brown, green, brown).

What is the overall resistance? You should find it’s about 1k3 — neither one thing nor the other! So, what’s the relationship? Well, a clue to the relationship between parallel resistors comes from the fact that, in a funny sort of way, parallel is the inverse of series. So if we inverted the formula for series resistors we saw earlier: 46 On the boards we would get: and this is the formula for parallel resistors. Let’s try it out on the resistors of this last experiment. Putting in the values, 10 k and 1k5 we get: which is about 1k3, the measured value.

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