Servo Motor Interface with MSP 430
Servo Motor Interface with MSP 430
Servo Motor Interface with MSP 430
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By<br />
Adarsh Reddy Ashammagari<br />
Gautam Makineni<br />
Premdeep Varada<br />
Navaneeth Garakahalli
Game Plan<br />
�<br />
� Automatic room-luminance control system aids in<br />
control of light luminance inside a room<br />
automatically.<br />
� This system is very helpful in setting brightness level<br />
in a room as set by the user.<br />
� System uses both sunlight and in-house electrical<br />
lighting to achieve this. (Window blinds will adjust)
LDR<br />
Key<br />
Block Diagram<br />
Sensor<br />
input<br />
Brightness<br />
input<br />
�<br />
<strong>MSP</strong> <strong>430</strong><br />
LCD Display<br />
<strong>Servo</strong> <strong>Motor</strong>
List of Components<br />
Component Qty Manufacturer Series<br />
Number<br />
Microcontroller 1 Texas Instruments <strong>MSP</strong><strong>430</strong>G245<br />
2<br />
Light<br />
Dependent<br />
Resistor<br />
1<br />
<strong>Servo</strong> <strong>Motor</strong> 1 Tower Pro 9 Gram<br />
Precision<br />
Micro <strong>Servo</strong><br />
LCD (16x2) 1 Newhaven NHD-0216HZ-FSW-<br />
FBW-3V3-C<br />
Connectors few
Integration Flow Chart<br />
Yes<br />
�<br />
Start<br />
Input from<br />
Key (K)<br />
LDR i/p<br />
If k<br />
==<br />
LDR<br />
No<br />
<strong>Servo</strong><br />
Display
Overall System Schematic
Light Dependent Resistor (LDR)<br />
� Basically a photoresistor,<br />
whose<br />
resistance varies <strong>with</strong><br />
amount of light.<br />
� Made of many semiconductive<br />
materials<br />
<strong>with</strong> high resistance.<br />
�<br />
0 v<br />
Vcc
LDR interface <strong>with</strong> <strong>MSP</strong> <strong>430</strong><br />
� Vcc to one end of LDR.<br />
�<br />
�� Other end to P1.2/A3- (Since it is an ADC pin)<br />
� To avoid shorting we make use of a Voltage<br />
divider circuit <strong>with</strong> LDR as one of the resistors.
LCD Display<br />
�<br />
� This is used to display the brightness level set by the<br />
user.<br />
�� It is a 16x2 LCD display
LCD Display <strong>Interface</strong> <strong>with</strong><br />
<strong>MSP</strong> <strong>430</strong><br />
�<br />
� We are using a 10K potentiometer to<br />
connect to the LCD display Vcc.<br />
�� This potentiometer is used to vary the<br />
brightness of the LCD display.<br />
� LCD display is connected to P1.0 to<br />
P1.6.<br />
<strong>Interface</strong> details<br />
RS EN D7 D6 D5 D4<br />
P1.0 P1.1 P1.2 P1.4 P1.5 P1.6
<strong>Servo</strong> <strong>Motor</strong><br />
�<br />
� eRC 8 Gram Precision Micro<br />
<strong>Servo</strong>.<br />
�� <strong>Servo</strong> motor is a DC motor<br />
whose position is controlled<br />
by the <strong>MSP</strong> <strong>430</strong>.<br />
� It has 3 pins.<br />
- Vcc<br />
- GND<br />
- Signal (P2.0)
<strong>Servo</strong> <strong>Motor</strong> <strong>Interface</strong> <strong>with</strong><br />
<strong>MSP</strong> <strong>430</strong><br />
�<br />
� The servo is powered of the 5v, and the servo control<br />
pin is connected to P2.0 on <strong>MSP</strong> <strong>430</strong>.<br />
� The servo motor is directly connected to window<br />
blinds, which helps to limit or increase the light<br />
intensity.
Challenges<br />
�<br />
� Testing the LDR input values.<br />
� Integration was the major challenge, since we had to<br />
� Integration was the major challenge, since we had to<br />
tune the servo <strong>with</strong> the input values from LDR and<br />
button input.
Thank you!<br />
�
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