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  • Audio Amplifier | Simple & Powerful

    I made your simple but very interesting project last nightand it was fantastic. The sound quality is remarkably good and the sound level is big enough to hear from the adjoiningroom, even after the door is closed. But I did some changes to your original designto suit my expectations after doing some calculations and following trial anderror method. I achieved the best result by the following changes,I did not use 12V power but used only two 18650 batteries(about 7V) as I always prefer to use 18650 in my small projects. I replaced thelight bulb with an 8.2 Ohm 7W wire wound resistor. Used a 4700 MFD capacitor tocouple the speaker. Used two 3.3 kilo Ohm resistors to make the stereo soundsource to the mono amplifier input.Even at a fairly high volume level, two batteries ran formore than 4...

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    I made your simple but very interesting project last nightand it was fantastic. The sound quality is remarkably good and the sound level is big enough to hear from the adjoiningroom, even after the door is closed. But I did some changes to your original designto suit my expectations after doing some calculations and following trial anderror method. I achieved the best result by the following changes,I did not use 12V power but used only two 18650 batteries(about 7V) as I always prefer to use 18650 in my small projects. I replaced thelight bulb with an 8.2 Ohm 7W wire wound resistor. Used a 4700 MFD capacitor tocouple the speaker. Used two 3.3 kilo Ohm resistors to make the stereo soundsource to the mono amplifier input.Even at a fairly high volume level, two batteries ran formore than 4 hours to show a noticeable power loss. Heat generated by theresistor and MOSFET was hardly noticeable.Hoping to build the stereo version in the future.This is truly a good project for kids and Tronics beginners.Thanks for publishing this wonderful project.

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  • samm008 made the instructable Audio Amplifier | Simple & Powerful 5 months ago
    Audio Amplifier | Simple & Powerful

    I made your simple but very interesting project last nightand it was fantastic. The sound quality is remarkably good and the sound level is big enough to hear from the adjoiningroom, even after the door is closed. But I did some changes to your original designto suit my expectations after doing some calculations and following trial anderror method. I achieved the best result by the following changes,I did not use 12V power but used only two 18650 batteries(about 7V) as I always prefer to use 18650 in my small projects. I replaced thelight bulb with an 8.2 Ohm 7W wire wound resistor. Used a 4700 MFD capacitor tocouple the speaker. Used two 3.3 kilo Ohm resistors to make the stereo soundsource to the mono amplifier input.Even at a fairly high volume level, two batteries ran formore than 4...

    see more »

    I made your simple but very interesting project last nightand it was fantastic. The sound quality is remarkably good and the sound level is big enough to hear from the adjoiningroom, even after the door is closed. But I did some changes to your original designto suit my expectations after doing some calculations and following trial anderror method. I achieved the best result by the following changes,I did not use 12V power but used only two 18650 batteries(about 7V) as I always prefer to use 18650 in my small projects. I replaced thelight bulb with an 8.2 Ohm 7W wire wound resistor. Used a 4700 MFD capacitor tocouple the speaker. Used two 3.3 kilo Ohm resistors to make the stereo soundsource to the mono amplifier input.Even at a fairly high volume level, two batteries ran formore than 4 hours to show a noticeable power loss. Heat generated by theresistor and MOSFET was hardly noticeable.Hoping to build the stereo version in the future.This is truly a good project for kids and Tronics beginners.Thanks for publishing this wonderful project.

    View Instructable »
  • samm008 commented on mikeasaurus's instructable 5 Ways to Remove a Stripped Screw2 years ago
    5 Ways to Remove a Stripped Screw

    Great options, by the way, I usuallyuse a grip plier or a standard plier if any part of the screw is accessible. Sometimesuse small pipe wrench, if the bolt is big enough to fit.

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