DoElect

Simple Transistor Tester Transistors are discrete electronics device majorly used for amplifying signal. However inn using this semiconductor, some experience difficulty in identifying the real pin out of this 3-terminal semiconductor device. The testing can be grouped as; 1.  Distinguishing an NPN from a PNP type transistor 2.  Identifying the Base, Emitter and Collector of all small signal type transistor 3.  Testing and Identifying a faulty transistor 1. Distinguishing an NPN from a PNP transistor Finding the base of a transistor using an Analog multimeter   Get an unknown transistor and test it with a multimeter (analog) set to "x10" Place the BLACK(negative)  probe on a pin and the RED(positive) probe on the two other pins and observe the swing on the multimeter. If the meter swings nearly full scale for the six combinations . Then you have a PNP type transistor. The terminal at which the BLACK probe is kept stationary is the BAS...

Few of them... Although, most of us know that these circuit components do exist but it is rather unfortunate that some people still finds it difficult to identify some components and there essence of usage in an electrical and electronics circuits. There are varieties of components both analog and digital based but, I will mention a few of them and overtime I will explain and listing out others. 1.  Capacitor:         A capacitor stores electrical energy when charged by a DC source. It can pass alternating current (AC), but blocks direct current (DC) e xcept for a very short charging current,called transient current. There are various types of capacitors that served different purpose. But today, I will only be writing on an electrolytic type capacitor. Electrolytic capacitor is simply a capacitor that is polarized so that it has positive and negative pin terminal. This type of capacitor can be used to electrical charge. Us...

JOUL E THIEF CIRCUIT DESCRIPTION A “Joule Thief” is a simple voltage booster circuit. It can increase the voltage of a power source by changing the constant low voltage signal into a series of rapid pulses at a higher voltage. You most commonly see this kind of circuit used to power LEDs with a “dead” battery, but there are many more potential applications for a circuit like this. In this project, I am going to show you how you can use a Joule Thief to charge batteries with low-voltage power sources. Because the Joule Thief is able to boost the voltage of a signal, you are able to charge a battery with a power source whose output voltage is actually lower than the battery itself. This lets you take advantage of low voltage power sources such as thermoelectric generators, small turbines, and individual solar cells. This circuit used in this project is a modified "Joule Thief."  A Joule Thief is a self-oscillating voltage booster. It takes a steady low voltage si...