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  • KT Gadget commented on bartroosen's instructable Easy Bluetooth Subwoofer Speaker (80W)2 months ago
    Easy Bluetooth Subwoofer Speaker (80W)

    I always like builds such as these because it's custom aesthetics. It's so awesome!One module to consider is this Bluetooth 4.0 board that has some of the better audio transfers. It would be easy to install since it's 12V input and that removes the 12-to-5V converter from the build.https://www.parts-express.com/sure-electronics-aa-ab41136-bluetooth-40-audio-receiver-board-aptx--edr-12-vdc--320-351

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  • KT Gadget commented on mecanicafina's instructable Safe Capacitor Discharge Tool5 months ago
    Safe Capacitor Discharge Tool

    In Step 2, this sentence doesn't make quite sense:"When Vcc - GND is positive, current will flow only via D1-D2-D3 and LED1. When Vcc-GND is positive, current will flow only via D4-D5-D6 and LED2."Shouldn't the second sentence be "negative" or written to show if it was connected in reverse polarity? Just a thought haha.Wonder how this would work with some of the larger Farad capacitors when discharging them.

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  • Anet A8 (Prusa I3) Auto Leveling Using NPN NC Proximity Sensor and Skynet3D V2 Firmware

    Most sensors like these will accept the 12V from the power supply, however, a resistor is needed to drop the voltage from the proximity sensor to the MAX voltage of the input side of the opto-coupler (this can range from 1.5V - 5V depending on the opto-coupler being used. Make sure to read the specs properly). The output side to the control board is (for the most part) just an open/closed switch for the microcontroller "switch" port to use. So imagine the output of the opto-coupler is the mechanical switch in this case.The case where a resistor is not needed is if the opto-coupler is mounted on a board you can buy that already has the circuitry built in to use 12V off the bat and hook up the wires to the control board.

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  • Arduino UNO Guitar Pedal - Open Hardware.

    Wasn't expecting this to be high quality anyways haha. More so just to add some voice effects if it works the way I think it would. Will test it out when I get the chance.

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  • Arduino UNO Guitar Pedal - Open Hardware.

    Would this be able to change the audio of an input signal from a music player or amplified mic input? I've been trying to find an audio modifier like this for a special project I'm doing with some paintball friends.

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