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Heartduino
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The heartduino is a heart-shaped arduino clone complete with onboard sensors and a 70 pixel LED matrix.
A fully-functioning
Arduino
-
clone
shaped like a heart, ready to be worn, and complete with an LED display, as well as temperature, light, and sound sensors. You can
get one at our store
. This is a stand-alone version of our
Heart Matrix LED display
with an arduino-clone ATMEGA328p and a bunch of sensors. It is great if you don't have an Arduino yet, but want to start soldering. The same code can run the Heartduino and the Heart Matrix, so all our other Heart Matrix tutorials will work. Just download our
Heart Matrix Arduino Library
to get it running. You can
connect the LED Display to twitter
, use it to
display sound waves
, control it
wirelessly with an XBEE
, or make it into a
love clock
!
Kit Contents
-
Kit ContentsHere you see everything that comes in the heartduino kit. Check the parts list below for the specifics. -
Sound Sensitive HeartThe heartduino has an on board electret microphone so it can display audio waveforms. Lots of fun at concerts! -
Heartduino PCB backsideThe back of the heartduino PCB. All of the components used are easy-to-solder, through-hole packages. Check out the three shift registers, the atmega, and the lm386 audio amplifier chip. -
Power by AAA battery, rechargeable lithium, or USB.The Heartduino can be powered by AAA batteries, lightweight rechargeable lithium, or a USB type B wire. We like those battery cases from adafruit. -
HeartDuino ZeroDisplay Numbers on your Heartduino! Temperature, noise level, light level and more! -
Say HelloSay Hello to the Heartduino! -
Heartduino as a Dynamic Re-useable NametagUse your Heartduino as a dynamic nametag, I'm Sam Nice to meet you. -
Fits in your palm.The Heartduino has an appealing form factor and is easy to attach to a necklace chain, or bracelet.
Here you see everything that comes in the heartduino kit. Check the parts list below for the specifics.
Heartduino The Heart-Shaped Arduino Clone Video
The Heartduino has an on-board
electret microphone for sound-sensing
with the audio amplifier LM386 chip, as well as a TMP36 temperature sensor, buttons and a potentiometer.
Step-by-Step Instructions
Step0Get The Heartduino DIY Kit
First, get yourself a
Heartduino kit at the LucidTronix store
. You will also need a soldering iron, solder, pliers and wire cutters or cutting pliers. Some scotch tape and a damp sponge to clean your iron will also be handy. Make sure your soldering area is well-ventilated and use eye-protection when cutting metal with the wire cutters.
Step1Insert all 10 ohm resistors
Insert all the 10-ohm resistors. Their are 11 slots, but you should have 12 in the kit, in case one gets misplaced. The 10 ohm reistors have a brown band follow by two black bands and then a gold band. Resistors are symmetric so the orientation you insert it in doesn't matter.
Step2Insert all 10K resistors
Now insert the 10K-ohm resistors, in their 10 slots. The 10K resistors have color bands brown black orange and then gold. The orange stands for the 3rd exponent of ten, and the brown and black make 10, so we end up with 10,000 ohms. More about resistor color codes
here
.
Step3Solder the resistors down
Now you can solder the resistors in place. Feel free to solder them on the same side you inserted them, as shown in the image. This way you wont mess up the nice clean white of the silkscreened circles.
Step4Insert and solder Thumb wheel Potentiometer
Now is a good time to insert the thumbwheel potentiometer. It is the black and white knob looking thing with the philips-head screw scores on its front, and three pins coming out. You definitely need to
insert this before you solder the shift registers down
, otherwise you wont be able to reach the pots pins to solder.
Step5Clip the Thumbwheels pins
Make sure to clip the pins of the thumbwheel with your cutting pliers after it is soldered down. Otherwise those pins will prevent the 74HC595 shift register from fitting snugly in its footprint.
Step6Insert and Solder 74HC595 Shift Registers
Speaking of the 74HC595 shift registers, lets go ahead and insert those guys and solder them down. These are the 3 ICs in the kits with two rows of 8 legs. Keep in mind you may want to pinch those rows of pins together with a ruler or a stapler before you try to insert them in the PCB. Also here orientation DOES matter. The silkscreened 1 on the PCB has to match up with pin one on the IC. Pin 1 is the pin directly to the left of the U-shaped depression at the top of the shift register. Use the image as a guide.
Step7Insert the LM386 Audio Amplifier Chip
Now to make the Heartduino sound-sensitive we msut amplify the small signal from the electret microphone. We use the LM386 audio amplifier to do this. This chip has 8 legs in two rows of four. Pinch those rows together and insert the LM386 so that the circular depression at top left lines up with the '1' silkscreened on the PCB.
Step8Insert the 16Mhz Crystal
For the arduino to keep up with the constant updates of the LED dot matrix we need a quick heart beat for our circuits brain.. The silver 16Mhz crystal oscillator gives the nice steady clock signal to our Atmega328 MCU.
Step9Insert the 22pf Capacitors
Now insert the 22 pico farad capacitors on either side of the crystal. These yellow capacitors have the number 220 printed on them. Their legs are bent into corners that you may want to straighten to more easily slip them into the PCB. These guys help maintain a nice steady clock signal. Engineer's Secret: sometimes you can get away without these caps, but its a good idea to have them just in case.
Step10Now add the 10uf and 0.047uf capacitor
The 10uf capacitor is blue. You may have a ceramic one or a little radial electrolytic one, both work fine. The 0.047 capacitor is yellow with corner-bent legs and the number 473 printed on it.
Step11Last Capacitors: 0.1uf
Finally, insert you two yellow 0.1uf capacitors. These guys have the numbers 104 on onse side and 232 on the other. They are yellow with straight legs.
Step12Chop Off Their Legs!!
Now, time to be an electronic lumberjack and chop all those metal legs of with your cutting pliers. Use eye-protection and gloves.. Be careful friends!
Step13Insert the first LED matrix in the Correct Orientation.
Insert one of the LED matrices in the orientation shown in the photo. The matrix must be on the same side of the PCB as the silkscreen and the letters printed on the side of the PCB should be facing the same way as the image shows.
Step14Insert the other LED Matrix in the Same Orientation.
Now insert the second LED Dot Matrix in the same orientation as the first one.
Step15Tape the matrices down
This step is optional, but its a good idea to tape the LED matrices down so that they aligned together nicely before you solder them in. After they are soldered, it will be difficult to fix a small gap between them.
Step16Insert the MODE and SELECT buttons
Insert the two buttons under the silkscreened labels 'MODE; and 'SELECT'. The buttons have four legs and a little black circular depressor.
Step17Insert the switch and the Electret Condenser Microphone
Now place the power switch and the electret condenser microphone into their proper spots as shown in the labelled image and solder them down.
Step18Last Step: battery clip and Battery Pack
Almost done!! Just pop the little white plastic JST battery connector in the spot labelled at the Heartduino's side. Load the battery pack with 3, AAA batteries and get ready for some wearable electric bling! Congratulations! If you got the kit from us, your Atmega has been pre-programmed with the code below. If you are rolling your own, than you will need to upload the code onto the Atmega328, using the 6 ISP pins. Either way, if you want to hack the Heartduino use the code below as a starting point.
Heartduino Arduino Code for Sound Sensing, Text Display, and Temperature Sensing
This code has three modes: sound sensing, text display, and temperature sensing. We use the mode variable to shift between the three modes. The sound mode shows the pixel level access that our Heart Matrix library gives you.You will need the
FrequencyTimer2 library
and our Heart Matrix Arduino library which you can download
here, at the original Heart Matrix Tutorial.
Download File
/* LucidTronix write messages on the Heart Matrix. * For instructions details and schematic, See: * http://www.lucidtronix.com/tutorials/18 * Connect the data, latch, and clock pins * to the corresponding pins on the heart matrix */#include#include // dataPin is on 2, Latch is on 3, and clock is on 4HeartMatrix hm = HeartMatrix(3,4,5);const int buffer_size = 10;int noises[buffer_size];const int num_cols = 12;int volumes[num_cols+1];int cur_index = 0;int mode = 0;int btn1 = 6;unsigned int last_shift = 0;void setup() { FrequencyTimer2::disable(); // Set refresh rate (interrupt timeout period) // if things break try making this number bigger FrequencyTimer2::setPeriod(2000); // Set interrupt routine to be called FrequencyTimer2::setOnOverflow(displayer2); pinMode(btn1, INPUT); for (int i = 0 ; i < num_cols+1; i++) volumes[i] = 7; }void loop() { if (mode==0){ // read the value from the sensor: cur_index = (cur_index + 1) % buffer_size; noises[cur_index] = analogRead(1) ; int var = variance(noises, buffer_size); if (millis() - last_shift > 40){ last_shift = millis(); for (int i = 1 ; i < num_cols+1; i++){ volumes[i-1] = volumes[i]; } } volumes[10] = constrain((var / 45), 0, 8); for (int i = 0 ; i < num_cols; i++){ for (int j = 0 ; j < volumes[i]; j++){ hm.set_pixel(i, j, true); } for (int j = volumes[i] ; j < 8; j++){ hm.set_pixel(i, j, false); } } delay(40); } else if (mode == 1){ hm.on(); } else if (mode == 2){ hm.on(); int temp_in = analogRead(2); float voltage = 4.0*temp_in; voltage /= 1024; float celsius = (voltage - 0.5) * 100 ; float fehrenheit = ((9.0/5.0)*celsius) + 32; String temps = "Celsius:" + String((int)celsius) + " Fehrenheit:"+ String((int)fehrenheit); hm.set_message(temps); } if (digitalRead(btn1) == HIGH){ if ( mode == 0){ hm.set_message("Hello I'm the Heartduino"); mode = 1; }else if ( mode == 1){ mode = 2; } else if ( mode == 2){ hm.animate(); mode = 0; } delay(500); }}void displayer2(){ hm.displayer();}int average(int* array, int length){ int sum = 0; int i; for(i = 0; i < length ; i++){ sum += array[i]; } int avg = sum / length ; return avg;}int variance(int* array, int length){ int dif_sum = 0; int i; int mean = average(array, length); for(i = 0; i < length ; i++){ dif_sum += (abs(array[i] - mean)); } int var = dif_sum / length ; return var;}
sam:
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Download link up... |
nomadchris:
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When I try to ve... |
Parts
| Title | Description | # | Cost | Link | Picture |
| PCB Heartduino | Standalone heart matrix arduino clone PCB. | 1 | $9.0 | Link |
|
| ATMEGA168A-PU | IC MCU AVR 16K FLASH 28PDIPValue: 16KB (8K x 16) 1.8 V ~ 5.5 V | 1 | $2.54 | Link |
|
| Temperature Sensor TMP36 | IC SENSOR TEMP 2.7/5.5 TO-92-3Value: 2.7 V ~ 5.5 V -40°C ~ 125°C | 1 | $1.42 | Link |
_TO-226_straightlead.jpg?1364964017)
|
| LED Dot Matrix | Displays Dot Matrix Panel 35LED Green Row CA Column CC 12-Pin DIPValue:2.8v Green | 2 | $0.99 | Link |
|
| Electret Condenser Microphone | MIC COND ANALOG OMNI -44DBValue: -44dB ±2dB 20Hz ~ 20kHz | 1 | $0.96 | Link |
|
| LM386 | IC AMP AUDIO PWR .325W MONO 8DIPValue:4 V ~ 12 V | 1 | $0.93 | Link |
|
| Potentiometer | POT ROTARY, Linear 10K OHM 9MM SNAPINValue:10k | 1 | $0.76 | Link |
|
| Shift Register | IC 8-BIT SHIFT REGISTER 16-DIP Serial to Parallel Tri-State 2 V ~ 6 VValue:74HC | 3 | $0.63 | Link |
|
| Capacitor | Ceramic Capacitors CAP CER 0.1UF 50V 20% RADIALValue: 0.1µF | 1 | $0.24 | Link |
|
| Button 6mm Through Hole | Tactile Switch Through Hole SPST-NO 0.05A 12VValue:0.05A @ 12VDC | 2 | $0.1 | Link |
|
| Resistor | RES 10K OHM 1/4W 5% CF MINIValue:10k | 5 | $0.08 | Link |
|
| Resistor | RES 10 OHM 1/4W 5% CARBON FILMValue:10 | 10 | $0.08 | Link |
|
Tutorials
Two LED matrices give 70 LEDs to light up a necklace with messages....
Combine an electret microphone, Arduino and a heart matrix for a sound-sensitive wearable device....
Connecting the MCP79410 real-time clock chip and our Heart Matrix you can show the time with love....
Control the Heart Matrix LED display wirelessly, using XBEE radio modules....
Standalone programmable Heart-Shaped LED display....
Wearable digital compass displays the direction in green LEDs....
Rainbow flower necklace using the TLC5940....
RGB Flashlight, wearable sound art, rainbow lamp....
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