Bike Safety Lights · From variable bike speed to voltage. Hall Sensor Frequency to Voltage...
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Bike Safety Lights Brad Seymour 6.101 Spring 2020 Automatic 1
Transcript of Bike Safety Lights · From variable bike speed to voltage. Hall Sensor Frequency to Voltage...
Bike Safety Lights
Brad Seymour
6.101 Spring 2020
Automatic
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Motivation
2
Sensors
Medium Vibration Switch – Adafruit https://www.adafruit.com/product/23843
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
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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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
From variable bike speed to voltage.
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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
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
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
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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
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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
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15
16
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