bike safety lights · from variable bike speed to voltage. hall sensor frequency to voltage...
TRANSCRIPT
![Page 1: Bike Safety Lights · From variable bike speed to voltage. Hall Sensor Frequency to Voltage Converter Power Control Voltage Shifter Vibration Switch Brightness Control PWM LED STRIP](https://reader033.vdocuments.site/reader033/viewer/2022060402/5f0e5fb27e708231d43eef38/html5/thumbnails/1.jpg)
Bike Safety Lights
Brad Seymour
6.101 Spring 2020
Automatic
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Motivation
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Sensors
Medium Vibration Switch – Adafruit https://www.adafruit.com/product/23843
![Page 4: Bike Safety Lights · From variable bike speed to voltage. Hall Sensor Frequency to Voltage Converter Power Control Voltage Shifter Vibration Switch Brightness Control PWM LED STRIP](https://reader033.vdocuments.site/reader033/viewer/2022060402/5f0e5fb27e708231d43eef38/html5/thumbnails/4.jpg)
Actuation through vibration.
Hall
Sensor
Frequency
to Voltage
Converter
Power
Control
Voltage
Shifter
Vibration
SwitchBrightness
Control
PWM
LED STRIP
Voltage
Pulses
Variable
Voltage 0-12VVariable Voltage
0-12VPulsed 12VDC
12VDC
Pulses
LED STRIP
LED STRIP
Medium Vibration Switch – Adafruit https://www.adafruit.com/product/23844
![Page 5: Bike Safety Lights · From variable bike speed to voltage. Hall Sensor Frequency to Voltage Converter Power Control Voltage Shifter Vibration Switch Brightness Control PWM LED STRIP](https://reader033.vdocuments.site/reader033/viewer/2022060402/5f0e5fb27e708231d43eef38/html5/thumbnails/5.jpg)
Detecting Wheel Speed
Hall
Sensor
Frequency
to Voltage
Converter
Power
Control
Voltage
Shifter
Vibration
SwitchBrightness
Control
PWM
LED STRIP
Voltage
Pulses
Variable
Voltage 0-12VVariable Voltage
0-12VPulsed 12VDC
12VDC
Pulses
LED STRIP
LED STRIP
Hall Effect Sensor IC– Digikey https://www.digikey.com
It also comes in a TO-92 package
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![Page 6: Bike Safety Lights · From variable bike speed to voltage. Hall Sensor Frequency to Voltage Converter Power Control Voltage Shifter Vibration Switch Brightness Control PWM LED STRIP](https://reader033.vdocuments.site/reader033/viewer/2022060402/5f0e5fb27e708231d43eef38/html5/thumbnails/6.jpg)
From variable bike speed to voltage.
Hall
Sensor
Frequency
to Voltage
Converter
Power
Control
Voltage
Shifter
Vibration
SwitchBrightness
Control
PWM
LED STRIP
Voltage
Pulses
Variable
Voltage 0-12VVariable Voltage
0-12VPulsed 12VDC
12VDC
Pulses
LED STRIP
LED STRIP
6
![Page 7: Bike Safety Lights · From variable bike speed to voltage. Hall Sensor Frequency to Voltage Converter Power Control Voltage Shifter Vibration Switch Brightness Control PWM LED STRIP](https://reader033.vdocuments.site/reader033/viewer/2022060402/5f0e5fb27e708231d43eef38/html5/thumbnails/7.jpg)
From variable bike speed to voltage.
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![Page 8: Bike Safety Lights · From variable bike speed to voltage. Hall Sensor Frequency to Voltage Converter Power Control Voltage Shifter Vibration Switch Brightness Control PWM LED STRIP](https://reader033.vdocuments.site/reader033/viewer/2022060402/5f0e5fb27e708231d43eef38/html5/thumbnails/8.jpg)
Lets use a different voltage for each strand
Hall
Sensor
Frequency
to Voltage
Converter
Power
Control
Voltage
Shifter
Vibration
SwitchBrightness
Control
PWM
LED STRIP
Voltage
Pulses
Variable
Voltage 0-12VVariable Voltage
0-12VPulsed 12VDC
12VDC
Pulses
LED STRIP
LED STRIP
8
![Page 9: Bike Safety Lights · From variable bike speed to voltage. Hall Sensor Frequency to Voltage Converter Power Control Voltage Shifter Vibration Switch Brightness Control PWM LED STRIP](https://reader033.vdocuments.site/reader033/viewer/2022060402/5f0e5fb27e708231d43eef38/html5/thumbnails/9.jpg)
And now, save some energy with PWM
Hall
Sensor
Frequency
to Voltage
Converter
Power
Control
Voltage
Shifter
Vibration
SwitchBrightness
Control
PWM
LED STRIP
Voltage
Pulses
Variable
Voltage 0-12VVariable Voltage
0-12VPulsed 12VDC
12VDC
Pulses
LED STRIP
LED STRIP
9
![Page 10: Bike Safety Lights · From variable bike speed to voltage. Hall Sensor Frequency to Voltage Converter Power Control Voltage Shifter Vibration Switch Brightness Control PWM LED STRIP](https://reader033.vdocuments.site/reader033/viewer/2022060402/5f0e5fb27e708231d43eef38/html5/thumbnails/10.jpg)
Finally, Automation.
Hall
Sensor
Frequency
to Voltage
Converter
Power
Control
Voltage
Shifter
Vibration
SwitchBrightness
Control
PWM
LED STRIP
Voltage
Pulses
Variable
Voltage 0-12VVariable Voltage
0-12VPulsed 12VDC
12VDC
Pulses
LED STRIP
LED STRIP
10
![Page 11: Bike Safety Lights · From variable bike speed to voltage. Hall Sensor Frequency to Voltage Converter Power Control Voltage Shifter Vibration Switch Brightness Control PWM LED STRIP](https://reader033.vdocuments.site/reader033/viewer/2022060402/5f0e5fb27e708231d43eef38/html5/thumbnails/11.jpg)
Timeline20-27 April 27 Apr – 4 May 4 May – 11 May
Design
Troubleshoot
Integrate
PCB Layout
Hz to V
PWMVolt Shifter
Power Cont
PWM
Volt Shifter
Power Cont
PWMVolt Shifter
Power Cont
PWMVolt Shifter
Power Cont
Hz to V
Hz to V
Hz to V
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Stretch Goals
Hall
Sensor
Frequency
to Voltage
Converter
Power
Control
Voltage
Shifter
Vibration
SwitchBrightness
Control
PWM
LED STRIP
Voltage
Pulses
Variable
Voltage 0-12VVariable Voltage
0-12VPulsed 12VDC
12VDC
Pulses
LED STRIP
LED STRIP
12
![Page 13: Bike Safety Lights · From variable bike speed to voltage. Hall Sensor Frequency to Voltage Converter Power Control Voltage Shifter Vibration Switch Brightness Control PWM LED STRIP](https://reader033.vdocuments.site/reader033/viewer/2022060402/5f0e5fb27e708231d43eef38/html5/thumbnails/13.jpg)
Block Diagram
Hall
Sensor
Frequency
to Voltage
Converter
Power
Control
Voltage
Shifter
Vibration
SwitchBrightness
Control
PWM
LED STRIP
Voltage
Pulses
Variable
Voltage 0-12VVariable Voltage
0-12VPulsed 12VDC
12VDC
Pulses
LED STRIP
LED STRIP
13
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