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  • How to use the Water Level Sensor - Arduino Tutorial

    Thanks! I'm trying to measure the water level on my balcony, but I wonder if there's any risk of short circuit if the water spills over the top. Is there any way to make the top part of the sensor water-proof?

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  • How to use a LilyTiny clone CJMCU / Comment programmer un clone LilyTiny CJMCU

    That's really useful. Merci beaucoup! I wonder which pins of this CJMCU LilyTiny are input, output or PWM? Does it output 5V as it is written behind the board? I suppose most of the Lilypad components are rated 3V maximum. Perhaps I need some resistors to drive the LEDs? Can I find the scheme or datasheet of it anywhere? Thanks!

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  • licheong commented on blinkyblinky's instructable DIY Arduino Nebulophone Synth1 year ago
    DIY Arduino Nebulophone Synth

    Thanks a lot, that's very detailed explaination! I've finally got all the parts needed. Let's see how it goes.

    I read the PCB diagram on Bleep Labs once more, and it seems the IR LED is actually connected in parallel with the ARP LED (the green one) instead of the LFO LED (the white one). And the alligator clip is connected to ground I suppose? It is confusing that the alligator clip is not shown on the schematic at all. While the PCB diagram shows two different places for connecting the alligator clip (one on the top right, the other one just beneath the atmega328 chip). I suppose that is actually a mistake, that he has probably put two versions of diagram together.

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  • licheong commented on blinkyblinky's instructable DIY Arduino Nebulophone Synth1 year ago
    DIY Arduino Nebulophone Synth

    Does it mean that there are two op-amps in the circuit? In the schematic the TLC2262 is put after the photocells, and there's another one without label before the photocells. That really confuses me.

    Sorry to bother again. There are quite a few things on the schematic that I still don't quite understand yet. 1. In the schemactic, the TLC2262 is put after the photocells, and there's another one without label before the photocells. Does it mean two op-amps, or just different pins of the same op-amp?2. Is the ARP switch just connecting A0 to ground? No resistor needed to avoid short circuit?3. In the schematic, pin 13 is connected both to IR LED and LFO LED. Is that a mistake? 4. It seems the keys are not arranged in a simple ascending order. I wonder how I can change it, but I can't find it in the code. Thanks a lot!

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  • 12 Easy, Helpful Uses for Heat Shrink Tubing

    Wow, can it be used to fix broken condom?

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  • licheong commented on yokozuna's instructable How to Steal an Instructable1 year ago
    How to Steal an Instructable

    Yeah, someone has stolen your "How to Steal an Instructable", and I'm going to claim I've made it!

    I've spent many hours on instructable, reading instructions on how to make something with Arduino, only to find that most of them actually don't know what they are doing, or they are copying the project from someone else. I'm very disappointed, and finally someone points out the problem, but Instructable still carry on like that...

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  • licheong commented on timbit1985's instructable Capacitive Touch Arduino Lamp1 year ago
    Capacitive Touch Arduino Lamp

    You made a simple project over-complicated! It is just a capacitive sensor, and the project is in the Arduino starter kit lessons. One doesn't even need to bootload a separate Atmega168 chip to do that, just use the Arduino uno, or any smaller Arduino boards. I know that it can save cost and space, but these are not necessary steps to make a capacitive sensor.

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  • licheong commented on planetleak's instructable Iphone bluetooth control arduino1 year ago
    Iphone bluetooth control arduino

    The link of the code is here. I wonder why he has put it in the youtube description but not here: https://drive.google.com/file/d/0B6GR9Hj5Ut61NzN5UEhQbGxVUkU/view

    Hi, I'm using HC-08, which is probably a clone of HM-10 according to internet. My iphone detected it with Lightblue, but it doesn't show up on the bluetooth device list on my Macbook. Does Macbook (pro retina, Yosemite) support Bluetooth LE device too?

    And I wonder if it is possible to send UART messages to the module? I've tried sending messages like AT, AT+RX and it doesn't reply at all.

    1. Get a HC-08, which is a BLE module. 2. A workaround is using Macbook to connect with your HC-06, and then connect your iOS device with Macbook via wifi. e.g. You can send keystroke or MIDI message by an app called TouchOSC to Macbook, and on the Macbook you can use CoolTerm or other software to establish serial connection with HC-06. I've tried that before. It kind of works but a bit too complicated.

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  • Arduino weather station with RF433 MHz modules

    Is it possible to do it on one Arduino only? I knew that IR modules on the same Arduino can communicate with each other. Is it possible to transmit and receive at the same time?

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  • licheong commented on blinkyblinky's instructable DIY Arduino Nebulophone Synth1 year ago
    DIY Arduino Nebulophone Synth

    Thanks for the prompt reply! I hope I can make one and try it.

    Is the alligator clip mainly for holding the note while you adjust other knobs? Is the keys capacitive sensors that respond to fingers too? Thanks!

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  • Arduino Touch Capacitive MIDI Keyboard

    Hey, your new code doesn't work. It only detect the sensor values in void setup(). To keep it detecting, that should be put in the loop() void. And I think it's better to use 0 to 11 for the arrays instead of 1 to 12 ,as arrays always start at 0. And your keyboard is supposed to start at middle C, which has the MIDI number 60. If you start the for loop from 1, what you'll get by (60+i) is 61, that means it would be transposed to C#. A great example by the way. Hope it helps!

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