Difference between revisions of "Night Light"
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We wish to construct a night light so that we are able to find our way around the house at night, even without turning the lights on, without having to manually flip a switch. We want to be able to put our night light into a standard light socket so that there is a way to store the night light easily without concern for losing it or stepping on it, and we also want there to be a way to turn the light on and off so as to not waste battery when not in use. | We wish to construct a night light so that we are able to find our way around the house at night, even without turning the lights on, without having to manually flip a switch. We want to be able to put our night light into a standard light socket so that there is a way to store the night light easily without concern for losing it or stepping on it, and we also want there to be a way to turn the light on and off so as to not waste battery when not in use. | ||
| + | |||
| + | |||
| + | === Challenges === | ||
| + | |||
| + | Most of this should be relatively straightforward- soldering with the perfboard may get a little hairy if we don't plan it out properly, so we'll need to take our time with that step. | ||
=== Gantt Chart === | === Gantt Chart === | ||
| Line 34: | Line 39: | ||
Total Cost: $3.43 | Total Cost: $3.43 | ||
| − | == | + | == Design And Solutions == |
| + | |||
| + | === The Housing === | ||
| + | |||
| + | For the housing, we designed a very simple box to house our night light. Due to time constraints we drilled holes in the box to fit the LEDs and photoresistor, but in the future we would make sure to take the time to design a box which fits the components better. | ||
| + | |||
| + | === The Electronics === | ||
| + | |||
| + | For the electronics, we simply soldered our components onto the perfboard as per the schematic. We did have an issue where we accidentally soldered a component on in an improper orientation, however with a little tinkering we were able to route the circuit appropriately so that our light lights up. | ||
| + | |||
| + | == Results == | ||
| + | |||
| + | Our box works basically as intended. When the photoresistor loses visibility to light, the two LEDs turn on as expected, and the switch allows the user to turn the circuit off for long-term storage. | ||
| − | + | === Shortcomings === | |
| − | == | + | Overall our project went well, however we had a few issues. Our box design wasn't very robust- we ended up simply drilling holes in the box and taping it back together, where it would have been much more ideal if we had learned more about CAD and designed the box to have the proper cutouts and attachment points. Additionally, we dealt with our soldering issue by hacking some circuitry together, where it would have been more optimal to take the extra resources to redo the circuit (which we didn't do due to budget constraints). |
| + | |||
| + | === Poster === | ||
| + | |||
| + | N/A | ||
| + | |||
| + | === External Links === | ||
| + | CAD Files can be found here (TODO put link here) | ||
Night Light Log: | Night Light Log: | ||
| − | + | [[Night_Light_Log|https://classes.engineering.wustl.edu/ese205/core/index.php?title=Night_Light_Log]] | |
[[Category:Projects]] | [[Category:Projects]] | ||
[[Category:Fall 2018 Projects]] | [[Category:Fall 2018 Projects]] | ||
Revision as of 21:28, 5 September 2018
Contents
Project Overview
It was a dark and stormy night... and it was so dark and stormy that you were in your house and couldn't see anything and tripped, fell and broke your arm. We wish to solve this epidemic of broken arms due to it being too dark by creating a light which automatically turns on in the dark, lighting up the darkness and making nighttime navigation possible!
Group Members
- Ethan Shry
- Tony Sancho-Spore
Project Proposal
N/A
Objectives
We wish to construct a night light so that we are able to find our way around the house at night, even without turning the lights on, without having to manually flip a switch. We want to be able to put our night light into a standard light socket so that there is a way to store the night light easily without concern for losing it or stepping on it, and we also want there to be a way to turn the light on and off so as to not waste battery when not in use.
Challenges
Most of this should be relatively straightforward- soldering with the perfboard may get a little hairy if we don't plan it out properly, so we'll need to take our time with that step.
Gantt Chart
Media:Night-light-gantt-chart.png
Budget
100K Ohm Resistor: $0.00475
330 Ohm Resistor: $0.00475
Photo Resistor (5mm GL5537): $1.50
9V Battery: $0.54
2N3904 NPM transistor: $0.19
2 5mm white LEDs: 2x $0.12
Slide Switch (adafruit product #805): $0.95
Total Cost: $3.43
Design And Solutions
The Housing
For the housing, we designed a very simple box to house our night light. Due to time constraints we drilled holes in the box to fit the LEDs and photoresistor, but in the future we would make sure to take the time to design a box which fits the components better.
The Electronics
For the electronics, we simply soldered our components onto the perfboard as per the schematic. We did have an issue where we accidentally soldered a component on in an improper orientation, however with a little tinkering we were able to route the circuit appropriately so that our light lights up.
Results
Our box works basically as intended. When the photoresistor loses visibility to light, the two LEDs turn on as expected, and the switch allows the user to turn the circuit off for long-term storage.
Shortcomings
Overall our project went well, however we had a few issues. Our box design wasn't very robust- we ended up simply drilling holes in the box and taping it back together, where it would have been much more ideal if we had learned more about CAD and designed the box to have the proper cutouts and attachment points. Additionally, we dealt with our soldering issue by hacking some circuitry together, where it would have been more optimal to take the extra resources to redo the circuit (which we didn't do due to budget constraints).
Poster
N/A
External Links
CAD Files can be found here (TODO put link here)
Night Light Log: https://classes.engineering.wustl.edu/ese205/core/index.php?title=Night_Light_Log
