My friend said that it is wasteful to make a holiday window decoration with LED strip. All in all, holiday only lasts couple of days, so we have to split and remove it just after few days. On second thought, that’s the truth.
This time, I want to make something useful. The smart phone should be powered off during charging. You know smart phones are a little dangerous when be powered. (SAMSUNG S10 explosion…) But how could we check time whenever we want? Of course, a clock.
Surfing the internet but failed, big clocks take too much space, small ones are hard to check the time. Well, a bright idea came up with a brainwave, I decide to make my own clock.
It is a rocky road but finally I succeed. When heard of praises like it is beautiful, all these are worthy.
Once open the door, a cute window clock jumps into my sight. With thousands of lamps at dark, the clock is so charming. At this time, joys spilt out from my heart, I truly know the answer of what’s the reality from the movie Forever Young.
Clock on the window---Light Year
Combine solar power manager with 15 solar panels to make an independent electricity supply to power the clock. The solar power helps us get rid of the restrict of external wires and the window would not be choked by long wires and switches. According to the energy amount, the clock responds to 3 modes.
Mode1(energy>70%): the clock keeps light ON.
Mode2(70%>energy>50%): the clock flashes to save power.
Mode3(energy>50%): the clock keeps light OFF but wake up periodically. With the decrease of the energy, its sleep time will increase exponentially.
In this way, the clock can work for one month even without any sunlight to supply energy. And the light sensor can adjust the clock lightness to adapt the environment light changes. So, no matter what whether it is, sunny, cloudy or night, we all can enjoy a comfortable watching.
Visual Design Considering people always pay attention to 2 values hour and minute, I weaken the visual proportion that the second takes, and simplify the second to matrix flash.
Talking about the Solar Power Manager, we should know its multiple ports.
There are 8 ports at least:
Micro USB input x1 3.7V inputs x2 (the 3.7v lithium battery can be charged when solar panel inputs or micro USB inputs are provided) 7v~30v solar power input x1 5V 1.5A output x1 3.3v 1A output x1 9v/12v 0.5A output x1 5v 1.5A USB output (which can directly supply UNO) x1
The maximum charge current up to 2A. The MPPT (Maximum Power Point Tracking) algorithm is adopted which maximize the solar power and capture the solar energy effectively. Just like a talented conductor who hold a delicate baton, it performs excellent in every wave. Therefore, all electrons move to destinations in order.
Let’s make it!
2.Laser cutting drawing (the purple lines are indications for soldering)
3.Laser cutting 3mm boards (the super small dots next to square holes are to indicate the direction of the LED notch).
5. Soldering enameled wire
During soldering, my friend just said “Oh my gosh, are you wanting to solder to die?” Well, finally I survived.
Adhere the board to window, it seems a little tilt. Try my best to hold me back from tear it apart (I am Virgo… and a little obsessive). Power ON, many LEDs just burnt immediately without any reason. So I have to take all of them down and solder again.
Try the second, perfect straight post! Now it fully relief me.
6.Put 3M twin adhesive(1mm) to the back of LEDs:
7.Connect solar panels in parallel, then paste them in the direction of window frame with 3M twin adhesive, put hot glue to the loosen parts.
8.Fix solar power manager, arduino UNO and sensors near to LEDs.
Tear all 3M adhesive in the LED board apart, take tools to paste to window in parallel and split LED and board apart slowly and carefully.
LEDs are allocated in the inner side and the controllers and other are allocated in the other side of the window. So we need to probe a small hole to go through the window frame and make LED enameled wire to the outside.
9.Wiring as the connection diagram suggests and burn the program.
10.Put the clock between 2 glasses. The glass reflections and refractions make a fantastic infinite space effect. It looks more layering.