Getting Started with Lily-pad Arduino – Robomart India

Basically Lily-pad Arduino is a microcontroller board in which Lily-pad is a set of electronic portion which are beautifully designed to build on various E-Textile(Electronic Textile). It’s innovative and entertaining that will definitely style you up.  Micro-controller, we used here is ATMEL 168 or ATMEL 328. Most important to be noted is voltage should not exceed 5.5 volt, otherwise the circuit will be damaged.

arduino_lilypadSpecifications of Lily-pad Arduino:

  • Micro-controller : ATMEL 168 or ATMEL 328
  • Input and operating voltage : 7-5.5
  • Current : 40 Ma (DC)
  • Digital I/O pin : 14 ( in which 6 provide PWM output)
  • Analog pins : 6
  • Flash memory : 16 KB (2 KB used for boot loader)
  • SRAM : 1 KB
  • EEPROM : 512 Bytes
  • Clock speed : 8 MHz

Moreover, you need to have sensors, actuators, speakers, led indicator and conductive thread to frame on your fabric.

Pin Description:

pin_description_lilypad_arduino

1.Port B(PB0-PB7) : Port B is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit).

  • Port B output pins: buffers high sink and source capability.
  • Port B input pins: externally pulled low to source current if the pull-up resistors are activated. The Port B pins are tri-stated when a reset condition becomes active, even if the clock is not running.
  • PB6 : used as input to the inverting Oscillator amplifier and input to the internal clock operating circuit, depending on the clock selection fuse settings,
  • PB7: Depending on the clock selection fuse settings, PB7 can be used as output from the inverting Oscillator amplifier.
  • TOSC2 & TOSC1: If the Internal Calibrated RC Oscillator is used as chip clock source, PB7…6 is used as TOSC2…1 input for the Asynchronous Timer/Counter2 if the AS2 bit in ASSR is set.

2.Port C(PC0-PC6):

  • Port C is a 7-bit bi-directional I/O port with internal pull-up resistors (selected for each bit).
  • PC5-PC0 Output: buffers have symmetrical drive characteristics with both high sink and source capability.
  • Port C input pins that are externally pulled low will source current if the pull-up resistors are activated. The Port C pins are tri-stated when a reset condition becomes active, even if the clock is not running.
  • PC6/RESET: If the RSTDISBL Fuse is programmed, PC6 is used as an I/O pin. Note that the electrical characteristics of PC6 differ from those of the other pins of Port C.
  • If the RSTDISBL Fuse is not programmed, PC6 is used as a Reset input. A low level on this pin for longer than the minimum pulse length will generate a Reset, even if the clock is not running.

3.Port D(PD0-PD7):Port D is an 8-bit bi-directional I/O port with internal pull-up resistors.

  • Port D output: buffers have symmetrical drive characteristics with both high sink and source capability.
  • Port D input pins: They are externally pulled low will source current if the pull-up 4 2545T–AVR–05/11 ATMEGA48/88/168 resistors are activated. The Port D pins are tri-stated when a reset condition becomes active, even if the clock is not running.

Other pins excluding these ports:

  • AVCC: AVCC is the supply voltage pin for the A/D Converter, PC3:0, and ADC7:6. It should be externally connected to VCC, even if the ADC is not used. If the ADC is used, it should be connected to VCC through a low-pass filter. Note that PC6…4 use digital supply voltage, VCC.
  • AREF: AREF is the analog reference pin for the A/D Converter.
  • ADC7:6 (TQFP and QFN/MLF package only): In the TQFP and QFN/MLF package, ADC7:6 serve as analog inputs to the A/D converter. These pins are powered from the analog supply and serve as 10-bit ADC channels.
  • VCC: Digital supply voltage
  • GND: Ground.

Applications of Lily-pad Arduino:

Lily-pad is in trend a lot and used up for numerous applications that include:

  • Touch sensitive shirt: Sound is produced when touched in certain places.
  • Police siren hat: Siren is produced when button is pressed.
  • Answer indicating shirt: LED glows when randomly questions are answered, by pressing button.
  • Hat awakening: it’s really interesting, when wearer heads falls to chest then vibrating motors shake and speakers ring to keep awake.
  • Dance costumes record dancer’s movements.
  • Enticed fabric wall hangings.
  • Lighting cycle gear.