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Started by japBLONK, January 20, 2021, 03:08:51 PM
Quote from: japBLONK on January 20, 2021, 03:08:51 PMHey guys,I want to build a tiny guitar amplifier and my drawer full of LM386's isn't cutting it. Are there any IC's that are currently manufactured that do at least 3W and are similarly as easy as the LM386 and ideally include some protection for overheating, etc? If not, maybe my best bet is to add a push-pull transistor output at the end of an opamp stage (like in the attachment) - but I don't know how I'd chose the resistor values or the transistors to get 3W safely.
Quote from: japBLONK on January 20, 2021, 03:59:58 PMThanks Joe, I just put a few of those chips in my digikey cart - will include some adapter boards too.I'm not sure I understand your need for the inverter? I see it has differential input, but don't you just ground the inverting input and send the signal to the non-inverting input? I get that it would be half the volume than if the diff input was used, but couldn't that gain just be made up in the pre-amp stage anyways?
Quote from: flester on January 21, 2021, 08:41:39 AMOne reason I use LM386 is that they provide an acceptable kind of distortion on their own. Will you be able to achieve that, or will it be a clean amp?
Quote from: willpirkle on January 21, 2021, 07:19:54 AMI'm using this TDA1517 stereo amp kit in one of my audio electronics classes. I built and tested it over Christmas and it is stable at 4 ohms. For $12 (Jameco, $27 on Amazon) it might be worth a try for your application. The output power will depend on the supply voltage and current capabilities.https://www.jameco.com/z/MK190-Velleman-2x5-Watt-Amplifier-for-Portable-Audio-Player-Kit-6-14VDC-1A_2196588.html- Will