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Friday, May 08, 2015

Embedded Microcontroller - delabs

Analog devices like transistors and diodes lead to opamps and analog computing. This takes more parts but with fast devices can be real time. Then came Logic and Digital Circuits, here also big systems will take too many parts. A very Old hp Logic Analyzer instrument, could be HP1607A, had more than five large PCBs, Toggle Switches and numerous 74Fxx TTL Chips. I tried to revive it, it could not be fully restored.

Embedded Microcontroller - delabs

Then came the solution the Microprocessor. Here the entire system goes into the firmware and a Hardware Tool Set in the Microprocessor made up of Logic and Math is sequentially used to perform the same operation that would require innumerable Gates in a plain hardware digital circuit. But as it performs the operations one after another, it takes time and is defined by the CPU Clock Speed.

Embedded Microcontroller - delabs

When the External RAM and EPROM and other peripheral devices moved into the main package, MicroController were born. When more external devices merged with the MicroController. It formed a nearly complete computer, this is known as the SOC.

Friday, May 01, 2015

The Success of the LED Lamp

The White LED Lamp is a Success today, more and more firms are manufacturing them. Millions are using it and is moving forward taking over the slots once occupied by CFL Lamps.

Still Filament and other Lamps are in use, even i like it much. CFL reliability and quality has improved. Then the LED Lighting has far too many Advantages and will be the Default Lighting Product of the future. It can easily adapt to the 24V Low voltage Standard, with Solar Energy Interface too.

The Insides of a LED Bulb

The AC to DC converter can be designed in various ways. The SMPS, the CFL Lamp Driver and this Mains Bulb LED driver all belong to the same Electronic Species.

First the 230V/110V at 50Hz/60Hz mains voltage is converted to DC with a diode bridge and filter cap. Not to forget protection and EMI filter circuits made of passive components.

Then it is an Oscillator that switches at High-Frequency, chops the 200V or 300V DC, say around 200 KHz. Then this AC is Stepped-Down with a High-Frequency Ferrite Transformer. Rectify the AC and use it to drive lamps with the current limit controls. The reliability of power devices and the Isolation in the Small Ferrite Transformer determine the life and safety of the bulb.

The Insides of a LED Bulb

White LED Lighting Lamps - 2011

We moved from Warm, Soothing and Healthy Edison Filament Lamps to CFL Lamps which are Energy Efficient, Bright but harsh on the Sensitive Eyes.

Energy Efficiency is of paramount importance for this age. Then, the light should be healthy for the eyes too. Eyes are very precious too.

That is the reason we need to Switch to LED lighting. It consumes low power, more reliable than CFL and gives Excellent and Safe Lighting.

LED lighting is expensive, as the Technology is slowly gaining acceptance. Please also bear in mind that low quality and unreliable LED products will also be in the market. In time, things will get seasoned and affordable quality products will be standard in all stores.

You can Contribute by trying them out and experimenting with its applications in home, office, vehicles and helper robots. Only those that design lamps that withstand Surges, Brown-outs, Lightning Strikes, Spikes will Shine just like the Lamp above



"Look i even got into an LED Lamp to emphasize the Importance of LED Lighting"

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