In this post I finish the presentation of components of used equipments.
Arduino:
Compared to the other Arduino boards, the Arduino Micro was the best choice for the smart clothes. It is based on the 8-bit ATmega32u4 microcontroller with 16 MHz clock speed. It has 12 analog inputs and 20 digital input/output pins of which 7 can be used for pulse-width modulation (PWM) outputs. After the filtering, the PWM output can be operated as analog output. The amount of available memory is 32 KB. It is a well-equipped devices with tiny size: 17,8 · 48,3 mm.
Batteries:
Because of the sustainable development and green aspects, I decided to use rechargeable batteries for the power supply. Types of AA and PP3 were used.
ECG taps:
The Ag/AgCl electrodes with foam tape has been selected for the ECG measurement.
LEDs:
The light emitting diodes (LEDs) are based of the active lighting system. The features of the applied items have varying luminous intensity (1-23,5 cd), almost the same forward voltage (1,85-2,1 V) and identical forward current (20 mA).
LDRs:
To detect the ambient light to change, the light dependent resistors (LDRs) has been selected. The resistance are between 5 kΩ and 20 MΩ.
Bluetooth module:
JY-MCU Bluetooth module are the selected device for the wireless communication between the developed system and smart phone.
Best regards,
Norbert Kovács