It is a 3D paper heart which starts Blinking (Glowing) when someone holds it. To surprise someone, this gift is a perfect idea as it looks like a simple origami heart but it starts blinking just like a beating heart when someone touches or holds it.
This Origami beating heart can be easily made in very less time.
So Lets make it !!!!!
Step 1: Getting Things Ready !
Download this template and print it in red paper.
- Template which was printed in red paper
- Pen/Pencil for marking
- paper cutter
- zero PCB
- Hard Wires
- C1815 transistors
- Resistors and Capacitors
- ATMEGA328 IC and its base
- Crystal Oscillator
- Female headers
- Soldering iron
- Glue gun
Rub the head of led with sand paper to avoid light focusing on a particular point.
Step 2: Print the Template and Cut It
Cut the template and lightly fold along the internal lines.
Step 3: Make Two Halves
Glued both the parts. On the bottom of the second half, paste the grid of two wires (as shown in picture) such that they should not touch each other.
To complete the circuit one should hold the heart.
Step 4: Circuit & Programing
Upload the program on ATMEGA328 micro-controller using Arduino and solder all the components on zero PCB according to the circuit provided.
The circuit consist of a micro-controller for blinking the LEDs in a specific pattern. I have used combination of 3 c1815 transistor as a touch switch which will activates even if the impedance is very high (hands). Now, when someone holds the heart, both the two wires at the back side gets in contact with hands which turn ON the LEDs .
Also, solder the wires from pin1(RST), pin2(Rx), pin3(TX) , Vcc and Gnd so that we can modify the program and charge the battery externally, if required.
Add a switch to save the power as some components always consume small amount of electricity.
Step 5: Join the Two Half
Place the circuit inside the bottom part of the heart.
Make small holes at the back side for female header and switch.
At the back side, connect one wire with positive power supply of the battery and other with the base terminal of transistor.
Now, test the circuit if everything works fine then glued both the half to make a complete heart.
Source: Origami 3D Beating Heart