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Personal Sun – Low fidelity prototype

Low fidelity prototype

For this week I mostly wanted to get materials, and also plan out how I could physically construct my device.

Low fidelity prototype:

I wanted to try placing the wooden panel with acrylic on the servo motor to rotate. I found out that the wooden panel was very wobbly when directly connected to the servo horn, and came up with a way to stabilise it.

I will connect the wooden panel directly to the base of the lamp instead, and connect the servo motor to that. 

For this week, I will start laser cutting the wood and the acrylic.

Also, I will have to look at ways to further diffuse the light from the LED strip, and I can even try using toilet paper to diffuse it – https://www.tweaking4all.com/hardware/arduino/adruino-led-strip-effects/#MakeyoureffectscoolerDiffuseLighttoiletpapermagic.

 

Working on medium fidelity prototype – PIR Sensor:

While testing out a PIR sensor, I found out that it will sense for a motion, and after 5 seconds then it will turn off and start sensing for another motion again.

An explanation of how it works, courtesy of https://osoyoo.com/2017/07/27/arduino-lesson-pir-motion-sensor/, is basically that:

“The output of this device will go LOW (or Off) for approximately 5 seconds after the time delay completes.   In other words, all motion detection is blocked during this three second period.

For Example:

  • Imagine you’re in the single trigger mode (see below) and your time delay is set 5 seconds.
  • The PIR will detect motion and set it high for 5 seconds.
  • After five seconds, the PIR will sets its output low for about 3 seconds.
  • During the three seconds, the PIR will not detect motion.
  • After three seconds, the PIR will detect motion again and detected motion will once again set the output high and the output will remain on as dictated by the Delay Time adjustment and trigger mode selection.”

The next step would be to try having multiple PIR sensors at once and also look at limiting the range of the PIR sensors (https://discuss.littlebits.cc/t/is-there-any-way-to-reduce-the-sensitivity-of-the-motion-sensor/21331).

 

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