element14 Community
element14 Community
    Register Log In
  • Site
  • Search
  • Log In Register
  • About Us
  • Community Hub
    Community Hub
    • What's New on element14
    • Feedback and Support
    • Benefits of Membership
    • Personal Blogs
    • Members Area
    • Achievement Levels
  • Learn
    Learn
    • Ask an Expert
    • eBooks
    • element14 presents
    • Learning Center
    • Tech Spotlight
    • STEM Academy
    • Webinars, Training and Events
    • Learning Groups
  • Technologies
    Technologies
    • 3D Printing
    • FPGA
    • Industrial Automation
    • Internet of Things
    • Power & Energy
    • Sensors
    • Technology Groups
  • Challenges & Projects
    Challenges & Projects
    • Design Challenges
    • element14 presents Projects
    • Project14
    • Arduino Projects
    • Raspberry Pi Projects
    • Project Groups
  • Products
    Products
    • Arduino
    • Avnet Boards Community
    • Dev Tools
    • Manufacturers
    • Multicomp Pro
    • Product Groups
    • Raspberry Pi
    • RoadTests & Reviews
  • Store
    Store
    • Visit Your Store
    • Choose another store...
      • Europe
      •  Austria (German)
      •  Belgium (Dutch, French)
      •  Bulgaria (Bulgarian)
      •  Czech Republic (Czech)
      •  Denmark (Danish)
      •  Estonia (Estonian)
      •  Finland (Finnish)
      •  France (French)
      •  Germany (German)
      •  Hungary (Hungarian)
      •  Ireland
      •  Israel
      •  Italy (Italian)
      •  Latvia (Latvian)
      •  
      •  Lithuania (Lithuanian)
      •  Netherlands (Dutch)
      •  Norway (Norwegian)
      •  Poland (Polish)
      •  Portugal (Portuguese)
      •  Romania (Romanian)
      •  Russia (Russian)
      •  Slovakia (Slovak)
      •  Slovenia (Slovenian)
      •  Spain (Spanish)
      •  Sweden (Swedish)
      •  Switzerland(German, French)
      •  Turkey (Turkish)
      •  United Kingdom
      • Asia Pacific
      •  Australia
      •  China
      •  Hong Kong
      •  India
      •  Korea (Korean)
      •  Malaysia
      •  New Zealand
      •  Philippines
      •  Singapore
      •  Taiwan
      •  Thailand (Thai)
      • Americas
      •  Brazil (Portuguese)
      •  Canada
      •  Mexico (Spanish)
      •  United States
      Can't find the country/region you're looking for? Visit our export site or find a local distributor.
  • Translate
  • Profile
  • Settings
Raspberry Pi
  • Products
  • More
Raspberry Pi
Raspberry Pi Forum A white board excercise on designing a Raspberry Pi temperaturing measuring device
  • Blog
  • Forum
  • Documents
  • Quiz
  • Events
  • Polls
  • Files
  • Members
  • Mentions
  • Sub-Groups
  • Tags
  • More
  • Cancel
  • New
Join Raspberry Pi to participate - click to join for free!
Featured Articles
Announcing Pi
Technical Specifications
Raspberry Pi FAQs
Win a Pi
Raspberry Pi Wishlist
Actions
  • Share
  • More
  • Cancel
Forum Thread Details
  • State Suggested Answer
  • Replies 29 replies
  • Answers 17 answers
  • Subscribers 666 subscribers
  • Views 2929 views
  • Users 0 members are here
  • raspberry_pi
  • pitempature
Related

A white board excercise on designing a Raspberry Pi temperaturing measuring device

colporteur
colporteur over 7 years ago

Looking for input on the design of a temperature measuring device using a Raspberry Pi.
 

I would like to use this forum to do a white board design exercise on a project I am developing. One of the interactions I miss after retiring from a 37 years career in technology, is the ability to sit with a group of techies and socialize an idea to get their perspectives. I would like to try using the Element14 community for such an exercise.
 

In a closed group, I would know the backgrounds of the individuals participating and from experience be able to evaluate their have opinions. Not all opinions have value. Using this forum doesn’t afford many of the face to face controls. I would like to work around that. I suspect there will be more overhead on my part to evaluate the input. I look forward to interacting with those who wish to participate.
 

Please provide your input around designing a temperature recording device using a raspberry Pi. The term input is defined as suggestions, recommendations, best practices, directions or questions. The pi_temp u

 

Looking for input on the design of a temperature measuring device using a Raspberry Pi.
 

I would like to use this blog to do a white board design exercise on a project I am thinking of starting. One of the interactions I miss after retiring from a 37 years career in technology, is the ability to sit with a group of tech guys to socialize an idea and get perspectives you may not have thought about. I would like to try using the Element14 blog for such an exercise.
 

In a closed group, I would know the backgrounds of the individuals participating and from experience be able to evaluate their have opinions. Using this forum doesn’t afford those controls. I can accept that. I suspect there will be little more overhead on my part to evaluate the input. I look forward to inacting with those who wish to participate.
 

Please provide input around designing a temperature recording device using a raspberry Pi. The term input, can be defined as suggestions, recommendations, best practices, directions or questions. The pi_temp unit will be used to measure and record water and air temperatures in and around an Atlantic Salmon fish ladder. The ability to operate without AC power would be an advantage but not a requirement. The unit will be isolated and have no access to a communication network. Data collected should be stored locally and retrieved manually on, no predetermined schedule. The unit may be deployed in rugged conditions exposed to the elements. People deploying and operating the unit, as well as collecting the data may have little technical skills.
 

Context:

I made an offer to build a device using a Pi, for a non-profit organization that works for the preservation of Atlantic salmon, to record water and air temperature and store the data for collection. This is a volunteer project with no funding provided. All cost are out of pocket. There are no plans to make this into a commercial product. I will write for publication in a technical resource when the project is complete. I saw a manual process and thought, hey I can fix that.
 

The project provides only the personal gain of applying years of technology knowledge to assist in solving a real world problem. My retirement now affords me time to take advantage of some of the offerings in the Element14 community.
 

Before starting the final design, I will make a post on this forum containing a list of the requirements I have gathered and hope to achieve in the project. This is mean’t to be a white board dialog exercise (experiment) to solicit input from tech folks. I welcome your participation.

  • Sign in to reply
  • Cancel
Parents
  • danielw
    0 danielw over 7 years ago

    I'm leaning toward the approach of mcb1.  I've relegated my PI B to monitoring temps in my house / garage using DS18B20 sensors.  If I wasn't wanting to access the data wirelessly, and I didn't have the PI sat in a box, I would have gone with an arduino for the lower power consumption. Over the past year I've had a few lockups that are fixed with a power cycle.  Weirdly it hasn't done it during summer (Yet)  It's in the garage and it's about 30 - 35C in there most days at the moment so it can't be an overheating issue!

     

    I've used AVR / Arduinos before but instead of SD card I used a separate eeprom.  Data storage was infrequent and sequential so I wasn't concerned about exceeding the maximum number of writes in the eeprom.  It Could run from 12V and NiMh battery.  When plugged in the battery charged up. The clock and calender was implemented in software, and ran from battery for a few days between charges using the low power modes of the AVR to increase battery life.

     

    Also if I can I fit an LED indicator.  We sometimes omit them to save pennies,  But it costs when you are trying to support a 'box' over the phone and don't even know if power is getting to it.

    If there's a processor I try to use a regular heartbeat, 2 or 3S that slows to 6S when on battery.  I also use as short an LED on time as possible to minimise power consumption.

    • Cancel
    • Vote Up +1 Vote Down
    • Sign in to reply
    • Verify Answer
    • Reject Answer
    • Cancel
  • rew
    0 rew over 7 years ago in reply to danielw

    I don't optimize led-on-time anymore. I use (green) leds that are "uncomfortably bright" when on 130 microamps, so I run them around 50microamps.....

    • Cancel
    • Vote Up +2 Vote Down
    • Sign in to reply
    • Verify Answer
    • Reject Answer
    • Cancel
  • Problemchild
    0 Problemchild over 7 years ago in reply to rew

    Indeed if you have a nano amp problem just get some more nano amps!!!

    • Cancel
    • Vote Up +1 Vote Down
    • Sign in to reply
    • Verify Answer
    • Cancel
  • mcb1
    0 mcb1 over 7 years ago in reply to rew

    130 microamps, so I run them around 50microamps

    I'm sure you meant milli amps, but then 50mA is far too high.

     

    I'm interested in these and would love to know where to buy them.

    I have a few other projects that need an indicator.

     

    Mark

    • Cancel
    • Vote Up +1 Vote Down
    • Sign in to reply
    • Verify Answer
    • Cancel
  • shabaz
    0 shabaz over 7 years ago in reply to mcb1

    Hi Mark,

     

    Some of the water-clear red LEDs (typical 5mm ones for example) are nicely visible end-on, at 100uA (and can even cast red light dimly at that level, onto a white surface), but still glow red at lower currents too.

    For the Smart Doorbell project, I used an orange LED that was surface-mount (but fairly large, so easy to hand-solder or attach wires) which at 2mA, was bright enough to see even in reasonably strong outdoor sunlight (the unusual summer here allowed that to be noticed!) at 2mA.

    It was this one: VLMO30L1M2-GS08VLMO30L1M2-GS08

    • Cancel
    • Vote Up 0 Vote Down
    • Sign in to reply
    • Verify Answer
    • Reject Answer
    • Cancel
  • mcb1
    0 mcb1 over 7 years ago in reply to shabaz

    shabaz

    Thanks .. I've added some to the basket.

     

    Mark

    • Cancel
    • Vote Up +1 Vote Down
    • Sign in to reply
    • Verify Answer
    • Cancel
Reply
  • mcb1
    0 mcb1 over 7 years ago in reply to shabaz

    shabaz

    Thanks .. I've added some to the basket.

     

    Mark

    • Cancel
    • Vote Up +1 Vote Down
    • Sign in to reply
    • Verify Answer
    • Cancel
Children
No Data
element14 Community

element14 is the first online community specifically for engineers. Connect with your peers and get expert answers to your questions.

  • Members
  • Learn
  • Technologies
  • Challenges & Projects
  • Products
  • Store
  • About Us
  • Feedback & Support
  • FAQs
  • Terms of Use
  • Privacy Policy
  • Legal and Copyright Notices
  • Sitemap
  • Cookies

An Avnet Company © 2025 Premier Farnell Limited. All Rights Reserved.

Premier Farnell Ltd, registered in England and Wales (no 00876412), registered office: Farnell House, Forge Lane, Leeds LS12 2NE.

ICP 备案号 10220084.

Follow element14

  • X
  • Facebook
  • linkedin
  • YouTube