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Everything posted by hubble
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Hi, I have an image of the transformer and I need to understand the data written on it. It seems to have three secondary windings. Here is the photo: What does this S1+S2=15V? Is the 15V shared between these two windings or is it the voltage rating for an individual winding? Is it same for the current rating as well? Thanks.
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Thanks Arun for your time. I have already implemented over current protection circuit but I am going to use regulator circuit as well. Thanks.
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Hi, I am almost done with designing the PCB. But one more question I want to ask is: Should I directly connect the battery to the modem or is there a need of any isolation or some kind of protection circuit required; like current limiting. Any suggestion will be appreciated. Thanks.
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Thanks a lot Hero999. I am going start this project as soon as possible. Thanks again for helping.
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Thanks Hero999 for your quick response. Although I posted a few links but I am not sure whether these circuits are really reliable. I mean as I am new to electronics I don't know whether these really are the circuits to start with. If they work perfectly then I am going to start my project. Thanks.
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Did I post the question in the wrong forum????
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Hi Sir, I am quite new to electronics. I have a modem (from Teracom) powered by 12v(DC) 1.5Amps adapter. I want to run this modem using a 12v battery which needs to be automatically charged using 230V 50Hz AC power. I came across many schematics when searching on the internet. Following are the two links I think we can start with: http://www.circuit-projects.com/battery/charger-circuit-for-6v-or-12v-car-battery.html http://electronicsuite.com/power-supply-2/12v-car-battery-charger-suite/#axzz1QP3aTqRg I have a 12V 4.5Ah battery. Can you please help me start designing the circuit? Thanks.
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I got it. Thanks Hero999
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Thanks Hero999 for your quick reply. Of the following four options what will you choose? 1) 0.5A 2) 1.0A 3) 2.0A 4) 3.0A I was asked this question during placement exam and I marked 2A giving the explanation that voltage will drop until the value of current is reduced to 2A. Am I correct? Thanks again.
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Hi, I have one question. Suppose I have 24v/2a DC power supply. If I connect 8 ohm resistor across this power supply what will be the current flowing through the resistor? And on what factors does the maximum current of power supply depend?
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In my initial post I said I want to get rid of wireless headphones. My goal is to aim a sound signal at a particular point without anybody in the area hearing it.
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I myself couldn't find enough relevant information. But I did find a link. http://www.explainthatstuff.com/directional-loudspeakers.html See if that can help. Thank you.
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I want the device to transmit within 7m. Basically I want to get rid of earphones. I don't want it to be so much powerful. I just want to use it at home for entertainment purpose. I don't want to disturb my neighbors when I am on loud music. I actually saw this system working in a disco where sound was 'embedded' in beams of light. I assume this works on the same principle.
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Hi, Can somebody help me with the circuit to produce directional sound. I read somewhere that ultrasound of certain frequency acts as a carrier wave and the information is the modulating wave. But I couldn't find the schematic. Is it much like the same as producing AM or FM?