Conversion from Decimal to Others

Decimal TO Binary Comparison with descending powers of two and subtraction List the powers of two in a "base 2 table" from right to left. Start at 20, evaluating it as "1". Increment the exponent by one for each power. The list, to ten elements, would look like this: 512, 256, 128, 64, 32, 16, 8, 4, 2, 1For this example, let's convert the decimal number 15610 to binary. What is the greatest power of two that will fit into 156? Since 128 fits, write...

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Nodal Analysis

Introduction Kirchoff discovered this: the total current entering a node equals the total current leaving a node! And, these currents can be described by an equation of voltages and conductances. If you have more than one node, then you get more than one equation describing the same system (simultaneous equations). The trick now is finding the voltage at each node that satisfies all of the equations simultaneously.Circuit...

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Number Systems

Number Systems Many number systems are in use in digital technology. The most common are the decimal, binary, octal, and hexadecimal systems. The decimal system is clearly the most familiar to us because it is a tool that we use every day. Examining some of its characteristics will help us to better understand the other systems. In the next few pages we shall introduce four numerical representation systems that are used in the digital system. There...

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Mesh Analysis

MeshesA 'mesh' (also called a loop) is simply a path through a circuit that starts and ends at the same place. For the purpose of mesh analysis, a mesh is a loop that does not enclose other loops.Mesh AnalysisSimilar to nodal analysis, mesh analysis is a formalized procedure based on KVL equations. A caveat: mesh analysis can only be used on 'planar' circuits (i.e. there are no crossed, but unconnected, wires in the circuit diagram.) Steps: 1. Draw...

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SIMPLE ELECTRONIC DECISION MAKER

ELECTRONIC DECISION MAKERA Simple circuit that makes decision for you within a FLASH....press "S1" to switch on the circuit and then S2 to make a decision.Circuit DiagramParts List1 - 390R 2 - 1K2 2 -33K 2 -100K 1 -1N4002 power diode 2 - LED 2 -0.1uF Capacitor2 - BC548 PNP 1 - slide switch 1 - push button ...

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TRAFFIC LIGHTS

TRAFFIC LIGHTS As well as the 4017 chip you will need a Hex (6) INVERTER and a Quad (4) AND gate chip.Don't forget that all three chips need power connected to the correct pins.The six diodes are Light Emitting Diodes (LED's).The 470k and 4.7 uF control the speed at which the lights change Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable...

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Starting Electronics Construction Techniques

Starting Electronics Construction TechniquesAs a step-by-step guide from circuit design to finished product, this practical electronics book actually explains how to select the right tools and components for the job, use a soldering iron, etch a printed circuit board and mount the finished product in a case - and puts skills into practice through simple self-build projects.Whilst most electronics texts focus on theoretical knowledge, Keith Brindley...

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Transistor tester circuit

Transistor tester circuit Description Here is a very simple circuit that can b e used to check the hfe of transistors. Both PNP and NPN transistors can be checked using this circuit. Hfe as high as 1000 can be measured by using this circuit.The circuit is based on two constant current sources build around transistors Q1 and Q2.The Q1 is a PNP transistor and the constant current flows in the emitter lead. The value of constant current can be...

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