Footstep [Earthquake?] Detection

This combo has a simple Piezo transducer hooked up to the Arduino, and is “advertised” as an Earthquake Detector, but I wonder if you could use it to detect motion on a floor or surface when feet are stepping…. Files available HERE

Earthquake Detector
Earthquake Detector

The creator of this one claims to have been inspired by the same TodBot Midi Drum Kit and Sound Trigger we talked about in an earlier Post

ChuckBot = Arduino+WiiNunchuck+2 Servos

So this project involves an Arduino,, Wii Nunchuck breakout piece and 2 servos….

The Fritzing stuff is HERE, and this image from the site gives you a sense of the circuit:

Virtual Color Mixer (Arduino + Knobs + Processing)

Virtual Color Mixer

(From HERE): You can send multiple values from the Arduino board to the computer using the serial print function. In this project, the analog values from three potentiometers are used to set the red, green, and blue values of the background color of a Processing sketch running on the computer.

Breadboard View Connect three potentiometers to power, ground and analog pins 0-2. Use the Arduino and Processing codes “Virtual Color Mixer” Files available HERE. This will give you a chance to prototype it…. BUT if you want to actually build it with an Arduino, you can also use it with Max 5 or 6, and the Tutorial for that (with code included) is very useful.

Auduino (Arduino Synth w/ 5 knobs)


It’s so simple but so delicious. Let’s make one… NOW!

Schematic for this Auduino
Schematic for this Auduino

Any analog sensor can control it, Heat, Sound, Wind, Brainwaves, Light, Skin Conductance, motion, etc. etc. etc.


Arduino + PressureSensor + VU Meter (Simple Circuit w/LEDs)

This might be extremely handy for providing visual feedback to the user of our DC Fest Organ. It is also from the Fritzing community.

Fritzing File + Code available here:

5 LEDs / (6) 1k resistors (brwn,blck,red) / 1 FSR / 1 arduino / 1 breadboard / ~12 wires.

forse sensor VU meter
forsce senser VU meter



Arduino + GE Color Changing Lights + new Library + printing PCB, please!

I found something at the bottom of the comments on link that Daragh sent us; you know, the one with the tutorial on hacking GE lights + Arduino

After viewing the this Arduino+GELights hack Post, a guy created a GE ‘Color Effects’ library for Arduino software: . This is hot off the presses kids, and was posted in Nov 2011. Here is the Direct Link to the Library Zip File.

If you don’t remember how to add a library in Arduino software, here is Arduino’s Documentation on Libraries:

Scott Harris’s ARDUINO CODE that inspired above library:

Futhermore, here is a close-up of a single 3-led light in all its glory from Scott@MentalFest:

I found a rather odd demonstration of the potential of these lights. Music and setting aside, I can see how these can totally define the piece.

Ok, Ok, back to business. Most important thing here:

(1) Actual GE Lights

(2) Light Hack Page + (and/or Useful Multi String How To )

(3) GE Color Lights Arduino Library (w/ example sketch)

(4) Hack the RemoteControl or build PDB > ColorNode Board  to replace the regular controller. Here is the schematic blueprint (can we print this board with our new machine?):, can we print this board with our new machine?

This could be a very fun (& USEFUL) project. Let’s do this!

~~~~~~~~~~~~~~~~~ Epilogue ~~~~~~~~~~~~~~~~~~~~~~~~~

PS – OK, now further down the initial GE lights hack page, a comment from “Steve” on Oct 3 goes like this: “Thanks for the info on the protocol it sure made hacking easer. My approach is to put a node in each of the controller boxes and link them together on RS485. I’m able to fit all the parts in the existing controller using DIPs if I switch to surface mount I’ll have all kinds of room. I’m using a PIC16F688 micro, I2C EEPROM (1 or 2), and a RS485 transceiver. The only mod is to drill a hole for the RS485 cable. I built a test setup to check my programming and powered it with a USB to TTL serial interface (I was able to power 2 of the LEDs from the USB port for testing). So far I’ve written code to do the following. 1. – Address and change individual LEDs in the string 2. – Load a lighting sequence into the EEPROM 3. – Run a sequence in the EEPROM (I have room for at least 16 different sequences).

The next step is to change over to RS485 and do line testing.

For the screws on the controller just get a set of jeweler’s screwdriver from the dollar store, one of the flat blade work perfectly to remove the screws.”

I’m not sure what this means, So I figured some info on RS 545 ports might come in handy? Ahh it goes on and on… 😛

Arduino+Pressure Sensor (Amplify+Stabilize=OpAmp)

This will prove handy for the DC Fest Organ project as well, methinks. If we are incorporating many of these sensors into our design, we will need a few OpAmp circuits.

This Fritzing schematic shows how you might create an Operation Amplifier (to be able to amplify and stabilze a resistive sensor like an FSR (pressure sensor) or Bend Sensor).

Check it out ( *Click Image Below* to get associated Fritzing + Processing files) :

Amplify + Stabilize Pressure Sensor
Amplify + Stabilize Pressure Sensor

(From the Project Website): Use a 10K pull-down resistor, any resistive sensor (an FSR for example) and an LM 358 Dual Op-amp. Connect the parts as shown in the screen-shot and also feel free to place a small ceramic cap between PIN1 on the Opamp and GND to smooth the signal even better.