mikroElektronika LightHz click User manual

1. Introduction
LightHz Click is an accessory board in
mikroBus™ form factor. Board features
TSL230BR programmable light-to-frequency
converter. The output can be either a pulse
train or a square wave (50% duty cycle)
with frequency directly proportional to light
intensity. Device sensitivity and frequency
scaling can be determined by the MCU, or
selected using available SMD jumpers if used
in hardware selection conguration. Solder
PWR SEL SMD jumper to 5V position if used
with 5V systems.
Once you have soldered the headers your
board is ready to be placed into 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.
3. Plugging the board in
2 3
2. Soldering the headers
1
4. SMD Jumpers
Frequency scaling and sensitivity
selection of the sensor can be set by
bringing the logic combination to S0 – S3 lines
according to sensor specication. This can
be done by soldering
corresponding SMD
jumpers to appropriate
logic voltage levels, or
they can be connected
to your MCU and
determined by software. Board comes with
SMD jumpers which are set to ON-BOARD
conguration of scaling and sensitivity. If you
want those lines to be available to your MCU,
just resolder SMD jumpers to MCU position.
Default on-board conguration for scaling
is (S2, S3) = (H, H), and for sensitivity is
(S0, S1) = (H, H).
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
bottom side is facing you upwards. Place
shorter parts of the header pins in the
both soldering pad locations.
LightHz click
Front and back side appearance
of the LightHz click Board
Before using your click board, make sure
to solder the provided 1x8 male headers
to both sides of the board. Two 1x8 male
headers are included with the board in
the package.
click
BOARD
www.mikroe.com
LightHz click Manual
ver. 1.00

8. Support
MikroElektronika oers Free Tech Support
(www.mikroe.com/esupport) until the
end of product lifetime, so if something goes
wrong, we are ready and willing to help!
7. Code Examples
.com
Once you have done all the necessary
preparations, it’s time to get your click
board up and running. We have provided
the examples for mikroC, mikroBasic and
mikroPascal compilers on our Libstock
website. Just download them and you are
ready to start.
6. Sensitivity and scaling
5. LightHz click Board Schematics
FREQ
VCC
S0
S1
S3
S2
FREQ
VCC
S3
S2
SENSITIVITY
SELECTION
FREQUENCY
SCALING
VCC
P2
P1 P0
P3
P3
P2
1
2
3
54
6
7
8
S0
S1
OE
GND VDD
OUT
S2
S3
U2
TSL230RD
AN
RST
CS
SCK
MOSI
MISO
+3.3V
GND
PWM
INT
RX
TX
SCL
SDA
+5V
GND
C1
100nF
VCC
E1
10uF
VCC
R1
220
1
2
3
S2 SEL
1
2
3S3 SEL
1
2
3
S2
1
2
3
S3
VCC
H
L
H
L
MCU
ON-BRD
MCU
ON-BRD
VCC
P1
S0
S1
P0
1
2
3
S0
1
2
3
S1 SEL
1
2
3
S0 SEL
1
2
3
S1
VCC
H
L
MCU
ON-BRD
H
L
MCU
ON-BRD
1 2 3
PWR SEL
+3.3V +5V
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 © 2012 MikroElektronika. All rights reserved.
Hardware conguration of frequency scaling
and sensitivity selection can be adjusted by
resoldering S0 – S3 SMD jumpers to H- logic
high or L - logic low positions, according to the
following table:
S0 S1 Sensitivity
L L Power down
L H 1x
H L 10x
H H 100x
S2 S3 f0Scaling
L L 1
L H 2
H L 10
H H 100