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Projects
PROJECT BASICS
POWER SUPPLY
INTRODUCTION
DC POWER from AC
VOLTAGE TRANSFORMATION
RECTIFICATION
FILTERING
REGULATION
DESIGNING OF FINAL CIRCUIT
BATTERY POWER
TYPES of BATTERY
DESIGN QUESTION
HOW LOAD AFFECTS POWER SUPPLY
SENSORS
RELAY
CURRENT BUFFER
BIDIRECTIONAL CURRENT BUFFER
PARALLEL PORT
LEVEL SHIFTER
WIRELESS COMMUNICATION
PROJECT IDEAS
 

 

 

Selection of POWER SUPPLY:

REQUIREMENTS: Suppose I have the requirement of a power source with very high current rating of 5A and 6V but lighter in weight. Also we can’t have a supply of 220 V to the system.

SELECTION:

  • As we can’t have a 220V, hence we can’t design the power supply our self by transforming AC to DC. Hence I need to use batteries.
  • It should be secondary battery so that we can recharge it.
  •  According to above said specification I select NiMH battery which have cell voltage 1.2V and 2700 mAh current rating. It can be recharge and weight of the battery is 33 gram. This battery is generally used in cameras. For 6V supply , I connect 5 battery in series.  

      1.2 * 5 = 6.0 V

And two sets of battery are connected in parallel then current will be

                           2700*2700 = 5400 mAh  

Total number of battery is 10. So the total weight of battery is

                 33* 10 = 330 gram

 

 

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