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24 January 2010

Electronics: How to interpret semiconductor devices model numbers.

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The post states the formats used for numbering the transistors, diodes and other semiconductor devices. It will make easy to identify the device by its model number. We have been using so many semiconductor devices and most of the times don’t know what there serial numbers really mean. Mainly there are 2 numbering standards used;

European based Pro-Electron System (for eg 1N4001, 2N2222)
American based JEDEC System (BC546, BC547) Continue reading

2 October 2009

Circuit: Transistor based 3.3V-5V Level Translator

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Nowadays most of the devices are running on 3.3 volts, and likewise their communication levels also work on 3.3 volts. For example XBee runs on 3.3 volts and to interface it with microcontrollers running on 5V, one needs to translated voltages levels so that they both communicate. This post gives a schematic of transistor based level translation with Proetus simulation. Continue reading

14 September 2009

Electronics: FAQs for Beginners

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Basic questions answered related to electronics about voltage,current, resistors and other basic components. The questions keep on rising every now and then, and so is this post keeps expanding.

Listed below are some of the questions which keep popping in your mind if you are new to electronics, or haven’t got enough time to study about them. Although these questions are very basic, but most of the people really don’t know the exact and logical answers. Continue┬áreading