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DIY LED lens

APL2017 last edited by
For my battery powered water leak nodes I wanted to add a clear lens to be able to see communication LED status on Arduino Pro Mini while maintaining reasonable water protection. The quick no cost solution was:
1. Drill small hole in node enclosure against LED location
2. Cover it from outside with masking tape
3. Put some amount of hot glue from the inside to cover the hole, wait till glue hardens, remove masking tape. And voila!!
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led lens 1

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@NotYetRated Hope you'll find good uses and a fun time while building your sensors.
Soil Moisture Sensor Powered by solar charged battery
My Project • battery home assistant low power eeprom solar calibration • • OldSurferDude

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@OldSurferDude I use this. https://www.homedepot.com/p/Orbit-Solenoid-for-Battery-Operated-Timer-57861/203151515 Instead of having to hold the valve open, i can just pulse it. I use a simple motor controller to pulse it and when i need to close it, pulse it in "reverse". That way I could use a battery and if it only opens once or twice a day it's only a half a second or so of draw off the battery.
Interface-board-for-remote-control
My Project • • OldSurferDude

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That is a well documented project. Much appreciated
BT832X PA / LNA
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Getting Better Range with NRF24L01 Modules
My Project • • MasonBlake

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Thank you so much for your support
Soil moisture sensor for house plants
My Project • soil moisture soil soil sensor plant • • Łukasz T.

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I think the comments you make are good. I do have a question about the removing the regulator. I assume you mean the 5V to 3.3V regulator. I connect to the 5V and I see lot of variation in moisture readings due to the variation in the output of the power supply (solar panel/stepdown). I have a calibration routine for that. The voltage can go as high as 4.2V, which I believe may be bad if I connect the power supply to 3.3V. Of course, this is not a concern if using two 1.5V batteries. With batteries, the moisture reading would be more consistent over a day. Lot of advantages there. I just don't like changing batteries and I really hate it when they leak. I have every reason to believe that my power supply will last 10 years and I am fortunate to live in a place with consistent sunshine . Someone replicating my project will have to take this into consideration. My design easily accommodates a different power supply. And my power supply could be used in other projects. Resistive vs Capacitive sensor. I'm glad you report good results. This gives people options. Water moisture: I've had good experience with "spraying" the Arduino with clear electronic coating and sealing the enclosure with liquid tape. -OSD

DIY LED lens

Suggested Topics

Welcome
Announcements • • hek

Soil Moisture Sensor Powered by solar charged battery
My Project • battery home assistant low power eeprom solar calibration • • OldSurferDude

Interface-board-for-remote-control
My Project • • OldSurferDude

BT832X PA / LNA
My Project • • nagelc

Getting Better Range with NRF24L01 Modules
My Project • • MasonBlake

Soil moisture sensor for house plants
My Project • soil moisture soil soil sensor plant • • Łukasz T.

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DIY LED lens

Suggested Topics

Welcome Announcements • • hek

Soil Moisture Sensor Powered by solar charged battery My Project • battery home assistant low power eeprom solar calibration • • OldSurferDude

Interface-board-for-remote-control My Project • • OldSurferDude

BT832X PA / LNA My Project • • nagelc

Getting Better Range with NRF24L01 Modules My Project • • MasonBlake

Soil moisture sensor for house plants My Project • soil moisture soil soil sensor plant • • Łukasz T.

21Online

11.7kUsers

11.2kTopics

113.0kPosts

Welcome
Announcements • • hek

Soil Moisture Sensor Powered by solar charged battery
My Project • battery home assistant low power eeprom solar calibration • • OldSurferDude

Interface-board-for-remote-control
My Project • • OldSurferDude

BT832X PA / LNA
My Project • • nagelc

Getting Better Range with NRF24L01 Modules
My Project • • MasonBlake

Soil moisture sensor for house plants
My Project • soil moisture soil soil sensor plant • • Łukasz T.

21
Online

11.7k
Users

11.2k
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113.0k
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