kikku26 Posted January 24, 2007 Report Share Posted January 24, 2007 i have made a buzzor using ic 74LS373only 500ma should be given .can i give above that (about 1.3 A)Huhwill the circuit work Huhi hae attched the circuit diagram ................. Quote Link to comment Share on other sites More sharing options...
MP Posted January 24, 2007 Report Share Posted January 24, 2007 If you have a 500 ma current limit in a circuit, you cannot use 1.3A. A resistor can limit current. You just calculate Voltage / Resistance to get the current in Amps. Did you mean the buzzer has a 500 ma current limit? The current for the buzzer is going through T1. Where in the circuit are you concerned about the 500 ma current limit? MP Quote Link to comment Share on other sites More sharing options...
kikku26 Posted January 25, 2007 Author Report Share Posted January 25, 2007 i am sorry the complete circuit has an adapter .the complete circuit is attach have not made the adapter but is using one which i bought. but the current from it is 8V and 1.3 Awhat cahnge shouli make to the circuit the transformer told in the diagram is 7.5V 500ma Quote Link to comment Share on other sites More sharing options...
MP Posted January 25, 2007 Report Share Posted January 25, 2007 Your circuit determines how much curent draw you will have. Not the power adapter. The rating on the power adapter tells you the maximum value that is possible. If I have understood your post correctly, you have no problem. If the power adapter is capable of more than the rating of the transformer, this is ok. You need no limitations in such a scenario. The circuit will only use what it needs. If you want to calculate this, you go through the spec sheets of all the parts, list their maximum current requirements, and add up all the branches of your circuit.MP Quote Link to comment Share on other sites More sharing options...
kikku26 Posted January 26, 2007 Author Report Share Posted January 26, 2007 ok thankx Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.