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  1. audioguru2

    RCA / Line out

    Hi Ivan, An RCA socket is a physical type of jack that is used for audio from 5mV phono catridges to 50V speakers and for inputs and outputs. A, "Audio Line Output" is usually a few hundred millivolts in level and a fairly low impedance.
  2. audioguru2

    NiMH Battery Pack Charger

    It is the mA/hr rating of the battery. 0.1C is a charging current that is 1/10th as much. Go to www.energizer.com and click on Tech Info near the top of the page. On the next page in the select box, choose Ni-MH Rechargable. The next page has a list of datasheets for their Ni-MH cells with an...
  3. audioguru2

    NiMH Battery Pack Charger

    For their Ni-MH cells, Energizer recommends a fast charge at a current no higher than 1C for best cell life. For reliability, Energizer recommends a 3-stage fast-charge routine and detecting the cell's temperature rise to cut back the charging current when it has reached 90% of full charge, with...
  4. audioguru2

    NiMH Battery Pack Charger

    Hi CPW, Battery manufacturers such as Energizer have good tutorials about their Ni-Cad and Ni-MH rechargable batteries. They show the temperature and pressure rise when the battery is nearly fully charged and also show the slight voltage drop that occurs and that battery charger circuits look...
  5. audioguru2

    need help on project amplifier design

    Hi Naveen, I assume that your amplifiers must drive a speaker. Have you set an output power and speaker impedance for your project? Have you studied the classes of audio amplifiers since class-B and class-C have terrible distortion? Usually class-AB is used for an audio power amplifier. Have...
  6. audioguru2

    about mixer

    Speakers have power ratings that are measured in Watts, not mW. Their max power rating is the amount of power the speaker can take from an amplifier continuously without damage to itself if it is in a suitable enclosure. A speaker operates fine with less power than its max power rating. Speaker...
  7. audioguru2

    Why Sink current is higher than Source current?

    Hi Staigen, Very old RTL logic chips used Vacuum toobes, didn't they?? ;D ;D
  8. audioguru2

    Help with RF Amplification

    Previously you were looking for parts: "I'm trying to make a handheld tv jammer". I think if you amplify it then you might jam TV reception over a wide area and cause interference over a much larger area. There will probably be many innocent people annoyed by your prank on your friends. Perhaps...
  9. audioguru2

    Why Sink current is higher than Source current?

    Hi Shahriar, The input of an old TTL gate is the emitter of an NPN transistor and has a max low current of 1.6mA. If a TTL output must drive 10 of them then its output current must sink 16mA. The input high current of a TTL gate is only 40uA. Newer CD4xxx Cmos gates have no input current, they...
  10. audioguru2

    Terminating a cable with a metallic braid

    I just twist the strands together before tinning them.
  11. audioguru2

    LM353N

    A TL082 and TL072 (low noise) also have jFET inputs and the same pins.
  12. audioguru2

    Bridge Amplifier

    Good, you have some bass in your car. ;D
  13. audioguru2

    12V to 5V

    The MAX724 is rated for a max current of 5A. More current might break it. The MSK5012 is a 10A linear regulator that will do the job if it has a huge heatsink to dissipate the 7V x 6A= 42W.
  14. audioguru2

    Terminating a cable with a metallic braid

    Hi Matt, Welcome to our forum. ;D I don't understand what is a metallic braid. What is the metallic braid's function? Do you mean a shielded audio cable?
  15. audioguru2

    NICd battery charger

    Hi Are you still talking about our project and your thread got moved? http://www.electronics-lab.com/projects/power/035/index.html You don't need a switch if your battery cells are all the same size. Just wire as many battery cell holders in series as the number of cells that you use. The...
  16. audioguru2

    I Need help for these Capacitors

    The first two descriptions and values don't make sense. Maybe they should be: 0.1 microfarad/50V ceramic disc capacitor. A 100V one would work the same. 4.7picofarad NPO (zero temp) ceramic disc capacitor. I have found that www digikey.com and www.newarkinone.com have more electronic parts than...
  17. audioguru2

    12V to 5V

    Look at the datasheet for a 7805 regulator. It shows that its max input voltage is 35V and that it has a well-regulated output up to 1.0A, and up to 1.5A with a small loss of regulation. More than half the power of the battery (7V) will be wasted as heat in the regulator so maybe you should use...
  18. audioguru2

    6V LED Chaser Question

    I did the opposite and used cheap red LEDs in my latest project. http://www.electronics-lab.com/projects/motor_light/009/index.html I must make another with ultrabright blue or green LEDs. Here is the schematic for you:
  19. audioguru2

    battery charger

    This discussion is about the project for it in our Projects Section: http://www.electronics-lab.com/projects/power/035/index.html I wonder why it was moved to this forum Theory??? I think it should be in the forum Projects Q/A.
  20. audioguru2

    Bridge Amplifier

    Hi Mukhalled, The TDA1521 is able to drive a single-ended 4 ohm load so is able to drive a bridged 8 ohm load to 18W at low distortion or 26W at high distortion with a 22V supply.
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