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Activity


shanlter commented on Monitor transparency, dissolved oxygen, ORP, and ammonia from a river

Hi @gretchengehrke, sorry for responding late, I was in a temple with no internet access in the p...

3 comments » about 9 hours ago

carohowe commented on What are ways to record ambient temperature every 5 sec and export easily?

Thanks @gretchengehrke -- that's definitely what we're looking into! So many of DC's food deserts...

4 comments » about 17 hours ago

carohowe commented on Seeking DC-area folks interested in building temperature sensors for urban heat island measurement

Thanks so much @liz @stevie and @bronwen for your input. Liz, I think it's a fantastic idea to us...

5 comments » about 17 hours ago

MadTinker commented on Build KnowFlow: automatic water moniter

@shantler @rockets FWIW- came home today with a mailbox literally full of 'stuff'. Also, many tha...

34 comments » 1 day ago

bronwen commented on What are some options for low cost methane monitoring?

This article is behind a paywall, but some of the tools/methods listed might be worth doing some ...

2 comments » 1 day ago

gretchengehrke commented on What are ways to record ambient temperature every 5 sec and export easily?

Hi @carohowe, this sounds like an interesting project! In addition to broadly looking at the impa...

4 comments » 1 day ago

liz commented on Software for mapping trees?

Hi Sebastian, i know OpenTreeMap is quite a big platform at this point, but considering how many ...

3 comments » 1 day ago

New page by stevie

Microscope

2 days ago | 0 | 0

stevie commented on Seeking DC-area folks interested in building temperature sensors for urban heat island measurement

Hi! The I See Change project was in Harlem not DC, but it might be a good example to check out.

5 comments » 2 days ago

nedhorning commented on Introducing the calibration plugin for ImageJ/Fiji

Hi Suman - Using Analyze => Measure should work. It's not uncommon to have high pixel values for ...

34 comments » 2 days ago

Redstone Rig 2.0

by cfastie 2 days ago | 2 | 0

warren commented on Web-based fisheye-removal prototype for correcting lens distortion

Actually i'm pretty jazzed for the possibility of some of actually doing the lens correction for ...

18 comments » 2 days ago

warren commented on Seeking DC-area folks interested in building temperature sensors for urban heat island measurement

@stevie was talking about a project with ISeeChange.org in DC -- Stevie, did you have a link, or ...

5 comments » 3 days ago

New edit by warren

Data Logging

Changes »

3 days ago | 0 | 1

warren commented on "Use or calibrate calibration" dont show my reference CFL already calibrated

Hi, can you link to the spectra you're talking about so we can see? Thanks!

1 comments » 3 days ago

BaptisteLeSergent commented on ramanPi - The 3D Printable Raspberry Pi Raman Spectrometer

Hello, Like Garret said a few days ago, we can't access the hackaday website anymore. Does anyon...

35 comments » 3 days ago

suman commented on Introducing the calibration plugin for ImageJ/Fiji

Dear Ned Horning, I calculated image calibration coefficients, using the reflectance data from d...

34 comments » 3 days ago

cfastie commented on Web-based fisheye-removal prototype for correcting lens distortion

I tried with a photo from a PowerShot S100. That's the only camera I have other than the Mobius t...

18 comments » 3 days ago

warren commented on Mobius non-fish eye and small lifter wrapup

Hi, @patcoyle - managed (with some help) to get the web-based lens distortion removal system work...

2 comments » 4 days ago

warren commented on Web-based fisheye-removal prototype for correcting lens distortion

OK - the GoPro clones can be corrected with: a: 1, b: 1, Fx: 0.16, Fy: 0.16, scale: 1.087, x: 1,...

18 comments » 4 days ago

cfastie commented on Mini Pearl Jam

The Mini Pearl Logger in the compost pile stopped logging today when the battery voltage dropped ...

2 comments » 5 days ago

warren commented on Web-based fisheye-removal prototype for correcting lens distortion

This was solved today by SpaVec! https://github.com/jywarren/fisheyegl/issues/3#issuecomment-315...

18 comments » 6 days ago

New edit by stevie

Stormwater Monitoring

Changes »

6 days ago | 0 | 1

Software for mapping trees?

Post an answer

Question by icarito 6 days ago | 3 | 1

New edit by engineeredgreenhouses1

Moderation

Changes »

7 days ago | 0 | 2

New edit by liz

community development

Changes »

7 days ago | 0 | 2

ccpandhare commented on How to verify generated NDVI Images?

Hi Chris! I tested this image. Had the same results. I them made an improvement to the older algo...

10 comments » 7 days ago

New edit by Shannon

Public Lab Nonprofit Team

Changes »

7 days ago | 0 | 6

gretchengehrke commented on EDDI - Eletrodialysis Desalinator for Desalination

@mienaikoe, This is so cool! How quickly can you process a liter of sea water? Also, you mentione...

1 comments » 8 days ago

gretchengehrke commented on Monitor transparency, dissolved oxygen, ORP, and ammonia from a river

@shanlter, this is great! Have you seen the spreadsheet on the www.publiclab.org/wiki/water-senso...

3 comments » 8 days ago

New edit by liz

community development

Changes »

8 days ago | 0 | 2

liz commented on A Questions page to encourage discussions through better UX

Hi @siyuan , i just posted this github issue about what seems to be redundant clutter on the /que...

5 comments » 8 days ago

New edit by stevie

Photo Monitoring

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8 days ago | 0 | 2

New edit by stevie

Water Sensors

Changes »

8 days ago | 0 | 2

warren commented on Sparkfun data logging troubleshooting?

Hi! sorry I missed this -- are you using a Raspberry Pi to run OpenPipeKit? If so, are you sure i...

5 comments » 10 days ago

Image is blue - First time

Answered

Post an answer

Question by LightWaveResearch8000 10 days ago | 1 | 0

How accurate are KnowFlow probes?

Answered

Post an answer

Question by rockets 10 days ago | 2 | 1

cfastie commented on How to verify generated NDVI Images?

These two sets of equations do not do the same thing. Set 1. var ndvi = 255 * (b - r) / (1...

10 comments » 11 days ago

cfastie commented on Mini Pearl Jam

I checked on the Mini Pearl logger in the compost pile today and swapped SD cards. It was still l...

2 comments » 12 days ago

warren commented on The Squid and the Rok

Great advice on the "tilting" fix -- this affected one of Liz's squids and we struggled to adjust...

3 comments » 13 days ago

MadTinker commented on Build KnowFlow: automatic water moniter

@liz Sounds great. I think there are three parts and I'll probably ask for advice on posting as t...

34 comments » 13 days ago

New page by warren

Mapping Requests

14 days ago | 0 | 0

New page by warren

Mapping Requests Template

14 days ago | 0 | 0

shanlter commented on Build KnowFlow: automatic water moniter

@MadTinker, awesome!! I'm trying to get familiar with Public Lab's logic as well, I guess the bes...

34 comments » 14 days ago

New page by gilbert

remote-sensing

15 days ago | 0 | 1

New page by stevie

Sensor enclosures

17 days ago | 0 | 0

The Squid and the Rok

by cfastie 17 days ago | 3 | 3

New page by liz

protest-mapping

18 days ago | 0 | 0

New page by liz

KnowFlow

19 days ago | 0 | 2

New page by stevie

Water Sensors

20 days ago | 0 | 2

New page by warren

Pi Camera

28 days ago | 0 | 1




A shared knowledge base for community science

New page by stevie 2 days ago

Microscope

New edit by warren 3 days ago - changes

Data Logging

New edit by stevie 6 days ago - changes

Stormwater Monitoring

New edit by liz 7 days ago - changes

community development

New edit by liz 8 days ago - changes

community development

New edit by stevie 8 days ago - changes

Photo Monitoring

New edit by stevie 8 days ago - changes

Water Sensors

New page by warren 14 days ago

Mapping Requests

New page by warren 14 days ago

Mapping Requests Template

New page by gilbert 15 days ago

remote-sensing

New page by stevie 17 days ago

Sensor enclosures

New page by liz 18 days ago

protest-mapping

New page by liz 19 days ago

KnowFlow

New page by stevie 20 days ago

Water Sensors

New page by warren 28 days ago

Pi Camera

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