There were some historic crude, but useable semiconductor rectifiers before high purity materials were available. Ferdinand Braun invented a lead sulfide, PbS, based point contact rectifier in 1874. Cuprous oxide rectifiers were used as power rectifiers in 1924. The forward voltage drop is 0.2 V. The linear characteristic curve perhaps is why Cu2O was used [...]
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Bloom Energy the Green Power
Google, eBay, FedEx, Walmart and Coca-Cola are examples of companies that have used the development of energy generation is a technology that will initially be used for the space program to Mars. Bloom Energy, the original Silicon Valley technology companies, has created a technology that can convert air and fuel into electricity through a chemical [...]
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The value of electricity
Electricity is versatile, clean to use, easy to distribute and supreme to control. Just as important, it is now established that electricity has better productivity in many applications than most other energy forms [1]. All this led to the wider utilisation of electricity and its replacement of other forms of energy in many uses. Demand [...]
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Transistor ratings and packages
Like all electrical and electronic components, transistors are limited in the amounts of voltage and current each one can handle without sustaining damage. Since transistors are more complex than some of the other components you’re used to seeing at this point, these tend to have more kinds of ratings. What follows is an itemized description [...]
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Electricity: electric current, resistance, power, voltage
WHAT IS FLOW OF ELECTRICITY? Electric current is defined as the amount of electrical charge that flows per unit time. unit of electric current is A (ampere) or in the written formula I. Electric current is the movement of groups of electrically charged particles in a certain direction. The direction of electric currents flowing in [...]
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THYRISTORS part 6 : The TRIAC
SCRs are unidirectional (one-way) current devices, making them useful for controlling DC only. If two SCRs are joined in back-to-back parallel fashion just like two Shockley diodes were joined together to form a DIAC, we have a new device known as the TRIAC: (Figure below) The TRIAC SCR equivalent and, TRIAC schematic symbol Because individual [...]
