mikroElektronika click boards Heart rate click User manual

2 3
2. Soldering the headers
3. Plugging the board in
Once you have soldered the headers your
board is ready to be placed into the desired
mikroBUS™socket. Make sure to align the cut
in the lower-right part of the board with the
markings on the silkscreen at the mikroBUS™
socket. If all the pins are aligned
correctly, push the board all the
way into the socket.
Turn the board upward again. Make sure
to align the headers so that they are
perpendicular to the board, then solder the
pins carefully.
Turn the board upside down so that
the bottom side is facing you upwards.
Place shorter pins of the header into the
appropriate soldering pads.
Before using your click board™, make sure
to solder 1x8 male headers to both left and
right side of the board. Two 1x8 male headers
are included with the board in the package.
4. Essential features
Heart rate click is suitable for prototyping
wearable devices for tness or medical
applications. The MAX30100 is a low powered
IC and it also incorporates ambient light
cancellation and motion artefact resilence.
For best results, the readings should be
taken through the tip of one’s nger (the
red and IR LED combination is optimized for
this application). The readings, however, can
be negatively impacted by excess motion
and temperature variations. Also, too much
pressure can constrict capillary blood ow
and diminish the reliability of the data.
1
Heart rate click carries a MAX30100
integrated pulse oximetry and heart rate
sensor. It’s an optical sensor that derives
its readings from emitting two wavelengths
of light from two LEDs, then measuring
the absorbance of pulsing blood through
a photodetector. The signal is processed
by a low-noise analog signal processing
unit and communicated to the target MCU
through the mikroBUS™ I2C interface. A
programmable INT pin is also available.
Uses 3.3V power supply.
1. Introduction
0100000089354
click
BOARDS™
www.mikroe.com
Heart rate click
Heart rate click Manual v100

NC
1
SCL
2
SDA
3
PGND
4
IR_DRV
5
R_DRV
6
NC
7NC 8
R_LED+9
IR_LED+ 10
VDD 11
GND 12
INT 13
NC 14
MAX30100
U1
AN
RST
CS
SCK
MOSI
MISO
+3.3V
GND
PWM
INT
RX
TX
SCL
SDA
+5V
GND
R1
2K2
VCC-3.3V
VCC-3.3V
C2
2.2uF
R3
22K
R2
120K
R4
12K1
1
2
3
IN
GND
OUT
5
4
EN ADJ
U2
AP7331-ADJ
C3
4.7uF
VCC-3.3VVCC-1.8V
SCL
SDA
VCC-3.3V
INT
E2
10uF
VCC-1.8V
INT
SCL
SDA
R5
4K7
R6
4K7
R7
4K7
VCC-3.3V
8. Code examples
MikroElektronika oers free tech support
(www.mikroe.com/support) until the end of
the product’s lifetime, so if something goes
wrong, we’re ready and willing to help!
Once you have done all the necessary
preparations, it’s time to get your click board™
up and running. We have provided examples
for mikroC™, mikroBasic™ and mikroPascal™
compilers on our Libstock website. Just
download them and you are ready to start.
.com
6. Dimensions
MikroElektronika assumes no responsibility
or liability for any errors or inaccuracies
that may appear in the present document.
Specication and information contained in
the present schematic are subject to change
at any time without notice.
Copyright © 2015 MikroElektronika.
All rights reserved.
mm mils
LENGTH 42.9 1690
WIDTH 25.4 1000
HEIGHT* 3.9 154
5. Schematic
9. Support
* without headers
10. Disclaimer
Reading oximeter and hear rate data from
the tip of one’s nger is one of several
possible approaches. More Heart rate sensing
solutions on click boards will be made
available.
Check: www.mikroe.com/click
25.4 mm / 1000 mils
42.9 mm / 1690 mils
7. Heart rate clicks