I sliced out a chuck of the infrared sensor's encasement because I wanted to try exposing more of the sensor. I hoped that if I could collect more light, the signal-to-noise ratio would make a cleaner signal. Even after the change, I couldn't shine the light back or detect my hand. When I brought the device into a dark room and held it away from any reflective surfaces, the noise level dropped, but it was still unusable.
I wondered why I couldn't get a meaningful reading, and the only time I could eliminate noise was when I flooded the sensor and jammed it. My biggest worry was that I picked up inductive currents in the wire originating in the LED conductors. Luckily, I found the culprit when I pointed a directional IR flashlight at the receiver from different angles. The bottom was more receptive than anywhere else and the only place not covered by the plastic. This made me wonder about the light-blocking properties of the resin. To test, I started my infrared camera and placed a thick platform over the flashlight, and I could see the light below the 6mm thick solid plastic plate. To fix the noise issue, I will redesign the infrared aerials.
IR shining through resin
The rest of the posts for this project have been arranged by date.
First time here?
Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Completed projects from year 7
Disclaimer for http://24hourengineer.blogspot.com and 24HourEngineer.com
This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All information on this blog, or linked by this blog, is not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property, or similar, is the responsibility of those involved in the replication.
All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.
Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim property or assets based on their post.
This blog, including pictures and text, is copyright to Brian McEvoy.
2021-05-22
I wondered why I couldn't get a meaningful reading, and the only time I could eliminate noise was when I flooded the sensor and jammed it. My biggest worry was that I picked up inductive currents in the wire originating in the LED conductors. Luckily, I found the culprit when I pointed a directional IR flashlight at the receiver from different angles. The bottom was more receptive than anywhere else and the only place not covered by the plastic. This made me wonder about the light-blocking properties of the resin. To test, I started my infrared camera and placed a thick platform over the flashlight, and I could see the light below the 6mm thick solid plastic plate. To fix the noise issue, I will redesign the infrared aerials.
The rest of the posts for this project have been arranged by date.
First time here?
Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Completed projects from year 7
Disclaimer for http://24hourengineer.blogspot.com and 24HourEngineer.com
This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All information on this blog, or linked by this blog, is not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property, or similar, is the responsibility of those involved in the replication.
All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.
Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim property or assets based on their post.
This blog, including pictures and text, is copyright to Brian McEvoy.
2021-05-22
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