FP - Bedroom
Dulce De Leche is focused on revolutionizing the modern bedroom experience. It's composed of MIT Students Aya Suzuki ('18), Diego Huyke ('17) and Matthew Orton ('16).
Four people inside. Three guys and a girl, all look like college students, carry a backspace, must be ~20 years old.
One is sleeping. Lies flat looking up with one knee in the air.
Everyone else is on their laptop. Two are sitting down on the couches, one is on the ground. I thought he was using the wall outlet to charge his laptop. In reality, he was taking advantage of the workspace.
The sun hits super hard here. Everyone that was already here sat in a way to avoid the sunrays. There's also blinds but nobody has bothered to lower them.
I couldn't lower the blinds, someone tied the string around the window, preventing movement.
The windows are large but always half-covered by the blinds
One of the girls using her laptop in the couch left at 10:46.
The person who is sleeping fell asleep with his bag on top of himself. Maybe this is to ensure it stays safe. Either way he has shifted some in the 15 mins so far.
Guy using his laptop near the wall, on the ground has left at 10:51.
The guy sleeping has gotten up, looked around and is trying to fall asleep again in a completely different position.
He's twitching his right foot so he's probably not asleep.
The bedroom that I'm studying presents different challenges from those of a regular one. First, this room is divided into two sections by a door. In one section there is a common space for lounging while the other holds just three beds. Furthermore, this room is interesting because it has three residents and therefore any problem associated with having a roommate is added with another.
I stayed in this room from about 1:30pm to 2am the next day. In my time, I was able to witness (for the majority of the time) the roommates hang out in the common area. The most interesting use cases occurred when a roommate wanted to take a nap at around 9pm and when another went to sleep around midnight.
Because of the division of room this was made fairly easy as one room is used almost exclusively for sleeping. The biggest problem was that as one of the roommates tried to go to sleep, the music from the common room invaded his space too much.
He therefore had trouble falling asleep for about two hours.
- The Bed Room Occupant, or BRO, grabbed cereal from his room before moving to the kitchen to make himself a snack before bed.
- He charged his laptop and cleaned up his desk a bit
- The bed isn't made, there are earplugs ad an alarm clock on the night stand amid what I perceived as random junk
- Important documents are taped to the wall by the door
- Walls are decorated with tokens of past memories and heritage
- Guitars crammed with an amp behind the door
- BRO started brushing his teeth in the bathroom but proceeded to the bedroom for the middle chunk of his teeth brushing
- Powered down his computer, emptied his pockets on his night stand, folded his pants and put them back in the drawer
- Moved a trash can by his bed and a tissue box on the night stand before turning off the light
To construct the looks like model, the material we will require are:
12" x 12" cotton sheet (x2)
We'll begin by carving out the blue foam into the shape of the alarm clock. Note that even the buttons for the alarm clock will be made out of this. After, we will paint the alarm clock black to resemble the final product.
We will sew the cotton sheets one atop the other with a thickness equivalent to the thickness of the force sensors. The separation will be made with blue foam.
Finally, to recreate the wire between the clock and the pressure sensing pad it would be easiest to just use wire.
This completes the construction of the looks like model for our product.
With this looks like model, we hope to answer the following questions:
(1) Is the alarm clock interface easy to use? (Are the buttons natural)
(2) Is the thickness of the pressure sensor noticeable for the sleeping person?
(3) Is the wire awkward to have near your bed?
Our works-like model will focus on the mechanical aspects of our alarm clock, including the functions of the buttons on the alarm clock and the pressure sensors. Our prototype will address whether the alarm clock is effective in its design, but not too annoying that people would not want to use it.
We can implement our prototype of the buttons of the alarm clock by working with the Arduino. We can use two buttons - one for the snooze button that will be placed on the top of the alarm clock, and the other for the on-off button that will be placed behind the screen - to mimic the interaction between the user and the product. We can test how loud and often the alarm should sound once the user presses either of the buttons.
We can implement our prototype of the pressure sensors by calibrating how much pressure must be applied for the machine to recognize the person is still in bed. This will require us to purchase pressure sensors and test them on different positions of the air mattress. We may also have to add some cushioning/fabric to the sensors if they are uncomfortable to sleep in.
Arduino UNO and kit with additional jumpers and resistors
4 digit, 7 segment LED display, possibly this one: http://www.digikey.com/product-detail/en/MSQC4411C/1080-1182-ND/2675673
2 X force sensitive resistors, ideally these because of their area and weight range: https://www.sparkfun.com/products/9376
Button for user interaction with alarm, perhaps this: http://www.digikey.com/product-detail/en/H8301ABBB/1091-1056-ND/2747887
Toggle switch for having an alarm or not, would prefer sliding switch but here is an option: http://www.digikey.com/product-detail/en/C3900BA/1091-1026-ND/2747857
We've decided to go against using blue foam for the construction of the looks like model. The reasoning for this is that although blue foam would be faster, accuracy is significantly less and it would not provide as close a model of what we want our product to look like.
We will use SolidWorks to CAD the clock by sides. Then, we'll laser cut each side on 1/8" acrylic.
The above image is what the clock would look like minus the front display and the buttons. Below are all the SolidWorks files available for download along with the DXFs for laser cutting.
While browsing the selection of parts at RadioShack, I purchased a cheap alarm clock with the intention of taking it apart to see if there were any insights into the design of an alarm clock that we could gain. The most notable finds are that the snooze button is a long bar with the two ends mounted onto push buttons, and the display is just a cutout of the segments that is illuminated by LEDs built into the main PCB.
For redesigning the alarm clock, we have decided to use a 3D printer. Although the cost would go up, the finish of the product would be more aligned with the style we desired. Curved edges will provide for a smoother finish.
We have decided to use a thin sheet of dark black acrylic to simulate the clock face. The holes in the acrylic will permit an LED to shine through it. We also decided to use additional acrylic along with pushbuttons to recreate the snooze button.
For the experience testing, we cut out a blue foam core alarm clock and set the time with a piece of paper. Our user would lie down on the air mattress and we would simulate the alarm clock going off.
From this, we learned that different users would require different ways of getting up. In other words, the users for this alarm clock might not include every person who uses an alarm clock.
We were able to control the individual LEDs on the clock display screen.
There is a fritzing diagram for a clearer picture of the circuit. The single digit displays are a placeholder for a 4 digit display. The actual pinout for the display used can be found on the attached datasheet.
We added an on/off toggle switch and potentiometer to the circuit design. When the toggle switch is off, the user will be able to set the alarm clock. When it is on, the clock takes the potentiometer value as input and rings after the designated amount of time.
What's left to be implemented:
Parts we need to obtain:
We started using one sheet of bright yellow cloth, but ultimately the material was too thick and felt too uncomfortable so we scrapped it.
Instead we finalized the looks like model by using a white soft cloth attached to a string of black wire.
Today we completed, in SolidWorks, the design of the clock. The double acrylic sheet design was scrapped in favor of a single one for the front. The housing was extended a bit and made taller (the final result is 0.5" less long and 0.5" taller than the looks like model). This was done in order to fit all the electronic components, see the assembly file below which contains mockups of all the components. In addition, we added a curved edge on the back for a cleaner, rounder look.
Ultimately the rounded edge was scrapped and the body was made half an inch less long in an effort to reduce the cost of the 3D printing (which totals at ~$150).
FInally, after finsihing 3D printing of the body, we were able to fit all the components inside. However, the short time meant that the wires were incorrectly palced and would be ruined when the case was closed. For this reason we used rubber bands to keep the faceplates in place during the final presentation.