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1Instructables30,371Views61CommentsEuropeJoined April 13th, 2015
Full time father and husband, engineer at heart, lifelong tinkerer in my spare time

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  • MarcFinns commented on MarcFinns's instructable AtmoScan3 months ago
    AtmoScan

    Cool!You even found a cheaper a PA7620 sensor on aliexpress? I wasn't aware of it, I couldn't find one at that time. Let me know when fully done!

    have you made it...?

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  • MarcFinns commented on MarcFinns's instructable AtmoScan3 months ago
    AtmoScan

    Not that I remember

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  • MarcFinns commented on MarcFinns's instructable AtmoScan4 months ago
    AtmoScan

    hi Scott, not sure what a mold sensor is. Any example you could point me to?

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  • MarcFinns commented on MarcFinns's instructable AtmoScan4 months ago
    AtmoScan

    IF ANYONE IS INTERESTED, I HAVE A COUPLE OF LASER CUT ENCLOSURES AVAILABLE AND ONE BOARD FULLY ASSEMBLED, FLASHED AND MODDED

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  • MarcFinns commented on MarcFinns's instructable AtmoScan4 months ago
    AtmoScan

    Hi Sanjoy, i suggest you assemble first the charging part and you test it separately. Much easier.When connecting the battery and the USB, you should see the blue led indicating power and the red led indicating charging.I assembled a few boards with this IC. In several cases it would not work at the first attempt... i removed the IC and soldered it again and at some point it did work. I never managed to fry one.You really need to make sure that after soldering you clean the board properly with appropriate solvant (isopropylic alcool normally) to remove all traces of flux. Then you inspect it very carefully from each angle, ideally with a magnifying glass or camera. Alignment with pads on all sides / perfect placing must be perfect. When positioning is fine, the typical issue I had is th...

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    Hi Sanjoy, i suggest you assemble first the charging part and you test it separately. Much easier.When connecting the battery and the USB, you should see the blue led indicating power and the red led indicating charging.I assembled a few boards with this IC. In several cases it would not work at the first attempt... i removed the IC and soldered it again and at some point it did work. I never managed to fry one.You really need to make sure that after soldering you clean the board properly with appropriate solvant (isopropylic alcool normally) to remove all traces of flux. Then you inspect it very carefully from each angle, ideally with a magnifying glass or camera. Alignment with pads on all sides / perfect placing must be perfect. When positioning is fine, the typical issue I had is that not all pins are connected, for example if the IC has too much solder underneath on the thermal pad. In these cases, you can even avoid desoldering and try to add solder with the iron. Again, clean and inspect before applying power...

    No need for the TOL. Just assemble all around the IC and you are fine. For the sake ogni testing that part you can stop mounting at the IRF mosfet acting as switch.

    Forgot: I have a cool mod in the pipeline, to allow the device to turn itself off from software. Useful when battery is depleted, instead of letting it die.Requires a very minor mod to the schematic, and it can be added to the current PCB. When i have a minute i will document & publish.

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  • MarcFinns commented on MarcFinns's instructable AtmoScan5 months ago
    AtmoScan

    Hi PG103F, did you make a full atmoscan..?Share the pictures!

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  • MarcFinns commented on MarcFinns's instructable AtmoScan5 months ago
    AtmoScan

    In fact i did not specify how to configure MQTT.The server is: mqtt.thingspeak.comChannels are in the following format: channels/<CHANNEL-ID>/publish/<WRITE-API>NOTE: you need 3 channelsQuestions from my side:1) Did you make the whole thing?2) what do you mean that the widget is rotated 180 degree?

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  • MarcFinns commented on MarcFinns's instructable AtmoScan5 months ago
    AtmoScan

    Hi there, i am traveling and i dont have much with me... however, here is what comes to mind:1) if you built the latest version fro github, there is nothing hardcoded anymore. From the configuration page you set all params including API keys of services etc2) Specifically, if i remember correctly, Step3 goes to GeoNames.org. Have you created an account there? The username is one of the config parameters above.Try adding some temporary log statements to see why it fails. let me know.

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  • MarcFinns commented on MarcFinns's instructable AtmoScan6 months ago
    AtmoScan

    Follow the link above to github. In the Eagle directory there is a bill of material file

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  • MarcFinns commented on MarcFinns's instructable AtmoScan7 months ago
  • MarcFinns commented on MarcFinns's instructable AtmoScan7 months ago
    AtmoScan

    Hi Sanjoy, the ESP12E cannot be easily programmed stand alone. So either you connect it to another board to program it, or you program it when soldered to the atmoscan board. Specifically, the atmoscan board inclides a programming circuitry that is in line with the NodeMCU. To program it you should connect a USB-Serial adapter (e.g. FTDI232 or similar) to the J7 connector (next to the reset button). Program can be uploaded without sensors connected, except that you should ground the interrupt line of the geiger sensor, Pin3 in in the RAD connector, otherwise the board will not boot. If nothing is connected to the board i am not sure if it will boot. Some sensors initialisation is blocking, courtesy of the provider of the library. One example is the multigas library. However, you could d...

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    Hi Sanjoy, the ESP12E cannot be easily programmed stand alone. So either you connect it to another board to program it, or you program it when soldered to the atmoscan board. Specifically, the atmoscan board inclides a programming circuitry that is in line with the NodeMCU. To program it you should connect a USB-Serial adapter (e.g. FTDI232 or similar) to the J7 connector (next to the reset button). Program can be uploaded without sensors connected, except that you should ground the interrupt line of the geiger sensor, Pin3 in in the RAD connector, otherwise the board will not boot. If nothing is connected to the board i am not sure if it will boot. Some sensors initialisation is blocking, courtesy of the provider of the library. One example is the multigas library. However, you could disable the related process, see the Q&A section. When it boots, it should recognise that it is not configured and should open a wifi hotspot, to which you can connect and set it up. Among the settings, there is a syslog server that helps greatly debugging. You can increase the logging level by uncommenting the #define DEBUG_SYSLOG in the GlobalDefinitions.h file.Serial is used only for first programming. After that, OTA programming via wifi is the preferred option.Please let me know if you succeed.

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  • MarcFinns followed mjrovai7 months ago
      • Real-time Face Recognition: an End-to-end Project
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  • MarcFinns commented on MarcFinns's instructable AtmoScan7 months ago
    AtmoScan

    Hi, i checked and in fact regular postage is cheap. Not sure if reliable though. I have the last PCB available and I would love to get it to the other side of the planet! Let me know if interested via private message.

    Hi, i checked and in fact regular postage is cheap. Not sure if reliable though. I have the last PCB available and I would love to get it to the other side of the planet! Let me know if interested via private message.

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  • MarcFinns commented on MarcFinns's instructable AtmoScan7 months ago
    AtmoScan

    Check on Postnl.nl (20-50 grams letter) and send me a private message!

    please send a private message via instructables if you are interested... I am losing track of who is who already!

    please send a private message via instructables if you are interested...I am losing track of who is who already!

    Do not send personal information via comments. Send me a private message instead

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  • MarcFinns commented on MarcFinns's instructable AtmoScan7 months ago
    AtmoScan

    hi there, greetings from Europe. See the new Q&A section!

    I thought i had replied but i dont see it... Thanks!

    Forgot: I really wanted to add sensors for H2S but only could find analog ones and never had the time to design a I2C A/D board. Methane and ammonia should be sensed by the MiCS6814 board but frankly i believe its design is flawed so i only use it for NO2. There is room for improvement and if anyone wants to work on it i'll be happy to contribute ideas

    hi, see the new Q&A section!

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  • MarcFinns's instructable AtmoScan's weekly stats: 7 months ago
    • AtmoScan
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      85 comments
  • MarcFinns commented on MarcFinns's instructable AtmoScan7 months ago
    AtmoScan

    Thanks foryour interest in my project! I answe the same way... Plenty of people asked for a PCB, way more than I everthought… I had the PCBs made by dirtypcbs.com and my files worked out justfine. Good quality and cheap enough, 25USD / 20Euro for 10 PCBs. I used two andhave 8 available so I would ask 2 Euro + shipment (depending on location andshipping preferences) just to recover the bare cost. I am afraid I will have topick the first ones that send me a private message and you will have to waitfor the weekend to have it shipped… busy week!

    Thanks foryour interest in my project and for the vote! Plenty of people asked for a PCB, way more than I everthought… I had the PCBs made by dirtypcbs.com and my files worked out justfine. Good quality and cheap enough, 25USD / 20Euro for 10 PCBs. I used two andhave 8 available so I would ask 2 Euro + shipment (depending on location andshipping preferences) just to recover the bare cost. I am afraid I will have topick the first ones that send me a private message and you will have to waitfor the weekend to have it shipped… busy week!

    Thanks foryour interest in my project! Plenty of people asked for a PCB, way more than I everthought… I had the PCBs made by dirtypcbs.com and my files worked out justfine. Good quality and cheap enough, 25USD / 20Euro for 10 PCBs. I used two andhave 8 available so I would ask 2 Euro + shipment (depending on location andshipping preferences) just to recover the bare cost. I am afraid I will have topick the first ones that send me a private message and you will have to waitfor the weekend to have it shipped… busy week!

    Thanks foryour interest in my project and for the nice comment! Plenty of people asked for a PCB, way more than I everthought… I had the PCBs made by dirtypcbs.com and my files worked out justfine. Good quality and cheap enough, 25USD / 20Euro for 10 PCBs. I used two andhave 8 available so I would ask 2 Euro + shipment (depending on location andshipping preferences) just to recover the bare cost. I am afraid I will have topick the first ones that send me a private message and you will have to waitfor the weekend to have it shipped… busy week!

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  • MarcFinns entered AtmoScan in the Epilog Challenge 9 contest 7 months ago
  • MarcFinns followed TechR9 and Beefsports7 months ago
      • Smart Speaker With Alexa and Google Assistant
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  • MarcFinns entered AtmoScan in the First Time Author Contest 2018 contest 7 months ago
  • MarcFinns commented on MarcFinns's instructable AtmoScan7 months ago
    AtmoScan

    I think the contest is over, but thanks anyway!

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  • MarcFinns posted an instructable AtmoScan7 months ago