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Thomazzz3

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2Instructables26,630Views15CommentsThe Netherlands
Hi, i'm Thomas a Dutch ICT student and graduated Mechatronics engineer. I like to Make projects, watch movies and series, sometimes read and try to play keyboard.

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  • Thomazzz3 commented on Thomazzz3's instructable Osu! Keyboard
    Osu! Keyboard

    In Step 7 I added code that uses the internal pull-up resistors. You can use that one

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  • Audio Switcher (Arduino)

    Hi,Your situation and setup is not very clear to me.As for your unconnected input question.(1) your PC will probably not detect a mic if it is not connected. For example in your "mic directly to output" case it will just act like an extension cable. If you want to test it just hook up a normal audio extension cable to your PC and see if it detects anything.(2) I believe there will be noise present on an unconnected input as an open ended circuit acts like an antenna. By directly connecting this to your output/PC it may cause noise and I don't know what will happen in you connect a mic an have one channel playing at the output.Maybe you can put your mic in to one of the 4 channels of the multiplexer. Or do you want to use your mic and one channel at the same time?(reference) No...

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    Hi,Your situation and setup is not very clear to me.As for your unconnected input question.(1) your PC will probably not detect a mic if it is not connected. For example in your "mic directly to output" case it will just act like an extension cable. If you want to test it just hook up a normal audio extension cable to your PC and see if it detects anything.(2) I believe there will be noise present on an unconnected input as an open ended circuit acts like an antenna. By directly connecting this to your output/PC it may cause noise and I don't know what will happen in you connect a mic an have one channel playing at the output.Maybe you can put your mic in to one of the 4 channels of the multiplexer. Or do you want to use your mic and one channel at the same time?(reference) Noise on input: https://www.diyaudio.com/forums/solid-state/254128-lots-noise-input-unconnected.html

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  • Audio Switcher (Arduino)

    Hi there,I'm glad you liked it! I know your trouble finding the right component. For ICs that need to perform very general tasks I generally look first at well known chip series like the 40xx or 74xx series.To answer your question I needed to look back at the datasheet. Yes, it looks like you can use the common pin as input source. The datasheet states that it is an analog multiplexer (many to one) as well as a demultiplexer (one to many).Have fun with your project ;)

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  • Audio Switcher (Arduino)

    Hi James,It sounds very fun what you are doing with Alexa. If I remember correctly D1 is a wemos D1 mini (with the esp8266). I've used it once for some wifi and deepsleep stuff, but not much more. Anyway to answer your questions:(1) the 74HC139 and leds are not needed. They are just indicators of which channel is selected. Just leave them out if you want.(2) yes, the capacitors have to be bipolar because the audio signal is AC. Polarized capacitors are not allowed to be reverse charged (if that's the correct term) . In this application you would call them coupling capacitors.Here the use of the capacitor is explained more clearly (upvoted answer) : https://electronics.stackexchange.com/questions/6958/audio-ac-coupling-capacitorsIf you have more questions just let me know. Goodluck!

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  • Thomazzz3 commented on Thomazzz3's instructable Osu! Keyboard
    Osu! Keyboard

    Yeah with wires is possible. A diy board is also possible, but you'll need to design your own panel because mine is 2 layers. You do need the resistors and capacitors in all cases

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  • Thomazzz3 commented on Thomazzz3's instructable Osu! Keyboard
    Osu! Keyboard

    The schematic can be found in step 2. The PCB is a 'nice to have' and is not necessary

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  • The stepper motors can be controlled withe the stepper library (Stepper.h)Note: your steppers are unipolarSchematics and sample code on arduino site:https://www.arduino.cc/en/Tutorial/MotorKnobThe servo can be controlled with the servo library.

    Ohh, and please don't connect the stepper motor pins directly to the Arduino. Most of the time those motors are bundled with a little driver board which uses the ULN2003.

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  • Thomazzz3's instructable Audio Switcher (Arduino)'s weekly stats:
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  • Thomazzz3 commented on Thomazzz3's instructable Osu! Keyboard
    Osu! Keyboard

    The answer to your question is 47x64mm, but actually you don't need to specify it.Just click on "quote now" and drag the gerber file to "add your gerber".for some reason instructables adds "+" signs to the zip title so you'll need to remove them

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  • Thomazzz3 commented on Thomazzz3's instructable Osu! Keyboard
    Osu! Keyboard

    For the keycaps any MX compatible caps should do it i think. I got mine from AliExpress but I wouldn't call it a "good place". I was more fucused on low price.https://s.click.aliexpress.com/e/WZq0KN6As for the diodes it is not clear to me where in the circuit you would need them and for what purpose. For that I need some more information.

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  • Nixie Clock / Display / Full Build

    Nice project!You mentioned you were looking into an alternative high voltage power supply. I don't know what you are using to power the whole project (230/115vac or some dc adapter) but maybe you could use a voltage multipier circuit. The one made from diodes and capacitors. I have no experience with nixie tubes, but it might be worth a try. If you use 230vac then you could also just try a full bridge rectifier and capacitor to smooth it out.

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  • Thomazzz3 commented on Thomazzz3's instructable Osu! Keyboard
    Osu! Keyboard

    Thanks.At the moment the RGB is just for fun. They can be programmed to respond to the keystrokes, but for now it is just a rainbow cycle. I wrote some helper functions to controll the leds so you are free to cusomize. The reativity of the maker is the limit. If you someone wants help creating a specific pattern or response they should ask in the comments. I'd be glad to help!

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  • Thomazzz3 commented on Thomazzz3's instructable Osu! Keyboard
    Osu! Keyboard

    Thanks =)

    No problem. But the signal between the receiver and monitor should still be RCA right? In that case the same board can be used.

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  • Thomazzz3 entered Osu! Keyboard in the Game Life Contest contest