The phrase binary digit? Coin a new, shorter word: the short, simple, elegant, and perfectly lovely word: bit. The earth is to electrons as an ocean is to drops of water.īoolean algebra can also be used to determine whether something satisfies a certain set of criteria.ġ − (the universe without something) means NOT. Resistance - the tendency of a substance to impede the flow of electrons - is measured in ohms. Voltage is similar to the water pressure. Voltage refers to a potential for doing work.Ĭurrent is related to the number of electrons actually zipping around the circuit.Ĭurrent is similar to the amount of water flowing through a pipe. In this way, chemical energy is converted to electrical energy. The chemicals in batteries are chosen so that the reactions between them generate spare electrons on the side of the battery marked with a minus sign (called the negative terminal, or anode) and demand extra electrons on the other side of the battery (the positive terminal, or cathode). The electricity in the circuit is the passage of electrons from atom to atom.īatteries generate electricity through a chemical reaction. Lightning is a lot of electrons moving very quickly from one spot to another.Īs one atom in the circuit loses an electron to another atom nearby, it grabs another electron from an adjacent atom, which grabs an electron from another adjacent atom, and so on. That’s how electricity happens.Īn imbalance of protons and electrons will attempt to correct itself.ĭuring storms, the bottoms of clouds accumulate electrons while the tops of clouds lose electrons.Įventually, the imbalance is evened out with a bolt of lightning.

(I rate this book a perfect 10 for what it is, but only giving an 8 here, because it’s not for everyone.)Įlectricity is like nothing else in this universe.Įlectrons can be dislodged from atoms. If you’re interested in learning computers from scratch, this is the definitive book for it.

Each chapter building perfectly on the previous. Basics of electricity, 1/0 AND/OR switches, boolean algebra, how physical switches can make an adding machine, bytes and ASCII text, memory, CPU, and so on, up to a working computer. Masterpiece of clear explanation! How to make a computer from scratch. Go to the Amazon page for details and reviews. Code - by Charles Petzold | Derek Sivers Derek Sivers Code - by Charles Petzold

Code charles petzold second edition