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Circuit Creations
Vibration Sensor Kit 107
Introduction
Welcome to the exciting world of Circuit Creations electronics kits. To assemble this kit you will need
the following basic items- 25W to 40W soldering iron, rosin core flux solder, diagonal cutters to trim
excess lead length after soldering, and needle nose pliers for lead bending.
The central component of this kit is the PIC16F1826 microcontroller. The extensive capabilities of
this microcontroller have been pre-programmed to provide a versatile vibration sensor. This kit is a
great building block for projects to create a vibration sensitive switch, a remote controlled switch,
intruder alarm, wind detection, motion detection, a gaming application… Your imagination is the limit
for what can be done with this kit.
Vibration Sensor K107 Features
 Switch selectable sensitivity
 LED indicator for vibration detection
 Switch selectable momentary or toggle output
mode
 Small, 2.2” x 1.7”, double sided Printed Circuit
Board (PCB) with mounting holes
 Dedicated output is activated when vibration is
sensed and remains latched until reset
 All microcontroller signals are accessible with
through-hole pads at the edge of the PCB
 Add your own circuits with surface mount and
through-hole component prototyping section
included on the PCB
 Wide input voltage range (2.7V to 12V) with
very low stand-by power, suitable for battery
operation
 Open collector output for connection to higher
power circuits and relays
Circuit Assembly
The assembly instructions for the components that are included with Kit 107 are as follows:
Designator
Value
U1
U2
U3
U4
U5
U6
PIC16F1826
MCP1702
------------Vibe Sensor
S1
C1,C2
R1
R2
R3
R4
R5
R6
LED1
Q1
D1
Dip Switch-4
1uF Capacitor
68 ohm resistor
1.2K resistor
--------330 ohm resistor
68K resistor
Red LED
2N3904 Transistor
1N4448 Diode
D2,D3
SD101C Diode
Assembly Instructions
Notch in package must match notch printed on the PCB, or dot on top
of package must be on the same side as the square pad on the PCB.
Flat side of package and flat side marking on PCB must match.
Not Used.
Not Used.
Not Used.
Polarity does not matter. Install this component last and do not bend.
Pin one of the package goes in the square pad with dot printed next to
it. There will be 2 rows of 4 unused PCB pads for this package.
Polarity does not matter.
Blue-Gray-Black.
Brown-Red-Red.
Not Used.
Not Used.
Orange-Orange-Brown.
Blue-Gray-Orange.
Shorter lead of LED goes in the hole with square pad on the PCB.
Flat side of package and flat side marking on PCB must match.
Band on package must match up with line on the PCB.
Band on package must match up with line on the PCB. Supplied in a 2
diode strip.
Not all component locations on the PCB have components installed for this kit and are “Not Used”.
See www.circuitcreations.com for general assembly helpful hints.
Vibration Sensor Kit 107
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Operation
Do not use the K107 vibration sensor with any life support system or any other application
where unintended operation might cause harm to people or damage property. Always
exercise caution when connecting the K107 circuit to any other circuit.
Connect a DC voltage, such as a power supply, battery, or Circuit Creations Power Supply Kit 101,
between 3 Volts to 12 Volts to the VIN and GND inputs of J1.
The operating mode for the Vibration Sensor is determined by switch S-1 settings listed in TABLE 1.
Mode
S1-1
S1-2
Momentary Active, Reduced Sensitivity
ON
ON
Toggle Active, Reduced Sensitivity
OFF
ON
Momentary Active, Maximum Sensitivity
ON
OFF
Toggle Active, Maximum Sensitivity
OFF
OFF
TABLE 1 – Switch S1 Settings. X = Don’t Care
S1-3
X
X
X
X
S1-4
X
X
X
X
When switch S1-1 is ON the outputs are active as long as vibration is detected and remains on for
about 200mS after the vibration sensor no longer detects vibration. When S1-1 is OFF the outputs
will toggle each time vibration is sensed. For cases where there is too much sensitivity so that the
circuit is activating unintentionally, S1-2 can be turned on to reduce the sensitivity.
The characteristics of the vibration sensor can be altered by attaching a small mass to the end of the
sensor such as a small amount of bees wax. Sensitivity can be increased by adding length to the
vibration sensor such as with a small post-it-note. In this configuration the vibe sensor can detect
very light breezes or wind currents that move the post-it-note.
There are 3 active outputs for this circuit.
OUTPUT
PAD
LED
RA2
The LED output illuminates the red ACTIVE LED depending on the
operating mode determined by switch S1.
RA3
The LCH output is initially low when the circuit is powered up and will be set
to a high of 2.5V when vibration is sensed. The LCH output will remain
high until it is reset by either removing power from J1, or changing any of
the S1 switch settings.
LCH
OC_OUT
OC_OUT
OUTPUT DESCRIPTION
The OC_OUT output is an open collector output that is normally open (i.e.
high impedance) and is active low depending on the operating mode
determined by switch S1. The OC_OUT output can be used to connect to
higher power circuits such as a relay.
TABLE 2 – Circuit Output Descriptions
The PCB for this kit has been designed to allow for flexibility and experimentation. All of the pins of
the microcontroller are accessible by through-hole pads on the edge of the PCB allowing integration
into your project. A prototyping area with 40 available through-hole pads on 0.1 inch centers and an
array of 119 surface mount pads spaced for common device packages including access to VDD and
GND is provided for your own circuit design additions. ENJOY!!
Vibration Sensor Kit 107
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Schematic
Vibration Sensor Kit 107
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