What did you build today (Pictures) ?



  • Well, Design of an home made electronic kit for my 10yo daughter to teach her by example. on 74HC595 (shift reg), 9 leds, 4 push buttons, some wrapping wire, ... We managed to build it, it works, with some bad contacts, but it works, she enjoyed the thing and the time spent together. Here is the schema and the pictures. I strongly invite parents to build it with their children, easy and fun. !
    1_1557074595586_59399854_1643957105747897_3582083341400145920_n.jpg 0_1557074595584_59168532_1643956979081243_7862945518123483136_n.jpg 0_1557074649088_Capture d’écran_2019-05-05_18-43-50.png



  • @fanfan
    Looks nice, and I love the idea that you spend time and knowledge to your kids πŸ™‚
    but looking at the current budget it seems that you are above the rated current consumption for the 74HC595, just so you don't wonder in case it burns when several LEDs are ON at the same time

    Input clamp current, I IK (V I < 0 or V I > V CC ) Β±20 mA
    Output clamp current, I OK (V O < 0 or V O > V CC ) Β±20 mA
    Continuous output current, I O (V O = 0 to V CC ) Β±35 mA
    Continuous current through V CC or GND Β±70 mA

    Data from here:
    https://www.sparkfun.com/datasheets/IC/SN74HC595.pdf




  • Banned

    @dbemowsk I've been gambling with an Adafruit AudioFX board and cobbled together this annunciator. Eventually it will likely be a MySensors node to play alarms or different sounds. It is using a reasonably-priced transportable speaker to play the sounds. I were given it to work with my doorbell button node today.


  • Hardware Contributor

    Prototyping my netatmo replacement device. It has an led strip that can simulate a lighouse, a rainbow or a fireplace...
    (If not used only for fun, it should warn you, if there is too much CO2 in the air.)
    0_1558731422060_IMG_3858.JPG


  • Mod

    Today I have spent a few hours trying to eradicate the confusion between MySensors' different message acknowledgements. See https://github.com/mysensors/MySensors/issues/1103 and https://forum.mysensors.org/post/34263 for details.

     core/MyGatewayTransport.cpp                |  11 ++++++-----
     core/MyMessage.cpp                         |   8 +++++++-
     core/MyMessage.h                           |  31 ++++++++++++++++++------------
     core/MyOTALogging.cpp                      |   2 +-
     core/MyProtocol.cpp                        |  16 ++++++++--------
     core/MySensorsCore.cpp                     |  41 ++++++++++++++++++++-------------------
     core/MySensorsCore.h                       | 114 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-------------------------------------------
     core/MySigning.cpp                         |   4 ++--
     core/MySigning.h                           |   2 +-
     core/MyTransport.cpp                       |  20 +++++++++----------
     core/MyTransport.h                         |   4 ++--
     examples/SecureActuator/SecureActuator.ino |   2 +-
     12 files changed, 147 insertions(+), 108 deletions(-)
    

    I have also updated https://www.mysensors.org/download/sensor_api_20 to use echo instead of ack when describing the echo function. That page didn't have information on the return value for send, present, reqestTime, etc so I added info on the return value as well.

    Reference: https://github.com/mysensors/MySensors/pull/1292

    mfalkvidd created this issue in mysensors/MySensors

    closed Rename "soft ack" to "echo" #1103


  • Mod

    When doing the change above, i noticed that after I created https://github.com/mysensors/MySensors/issues/1107 the number of undocumented MySensors keywords has more than doubled!

    The plan was to let the MySensors butler check for missing keywords as soon as the few remaining keywords were documented. If I add the check on the existing code, the butler wouldn't allow any commits which would hinder development. But since no-one has documented the missing keywords in over a year, I decided to blacklist the missing keywords and add the check anyway. The new check will give developers a list of new missing keywords, if they add any, so they can be documented.

    Reference: https://github.com/mysensors/MySensors/pull/1293

    mfalkvidd created this issue in mysensors/MySensors

    open Document missing keywords #1107


  • Mod

    I've also submitted documentation updates for clarifying MY_RX_MESSAGE_BUFFER_FEATURE limitiation on esp8266 and renaming RadioSetting to TransportSetting for https://www.mysensors.org/apidocs/group__RadioSettingGrpPub.html

    References:
    https://github.com/mysensors/MySensors/pull/1296
    https://github.com/mysensors/MySensors/pull/1295



  • Today I have finished my d-diot board:

    d-diot board

    The board is part of the d-diot project (see my other post)



  • My 3V Node (Atmega328P 1MHz), embedded NRF24L01+ with ceramic antenna, ATSHA256, AT25DF512, BME208, LED, Battery monitoring, ICSP, FTDI, Castelizable, Breadboardable. 0_1560175339322_IMG_20190610_155632461.jpg



  • @fanfan nice! How is the signal compared to stock nrf24 modules? How much for antenna?



  • @monte A little bit less, but not a lot. I still need to improve the PCB (better castelization tracks, remove diodes, ...) and this should be ready to be copied/used.





  • @mfalkvidd
    Looks impressive!





  • Today.... This MQ2 gas sensor with Neopixel RGB lamp on top and a capacitive touch button under the circle mark on the front.

    5_1562001267230_DSC_3411.JPG 4_1562001267230_DSC_3410.JPG 3_1562001267230_DSC_3409.JPG 2_1562001267230_DSC_3408.JPG 1_1562001267230_DSC_3407.JPG 0_1562001267230_DSC_3405.JPG

    It is part of the d-diot project. The files of the 3d-printable case are available in Thingiverse.

    The firmware is available here, the wiki page is under construction.

    In the next weeks I will try to print it in wood... Just to increase the WAF πŸ˜‰



  • My new micro-sensor water leak ready. Powered by NRF52832-CIAA
    7_1562099024631_photo_2019-07-02_19-55-19.jpg 6_1562099024631_photo_2019-07-02_19-51-25.jpg 5_1562099024631_photo_2019-07-02_19-49-52.jpg 4_1562099024631_photo_2019-07-02_19-49-51.jpg 3_1562099024631_photo_2019-07-02_19-49-51 (2).jpg 2_1562099024630_photo_2019-07-02_19-49-50.jpg 1_1562099024630_photo_2019-07-01_02-46-18.jpg 0_1562099024629_photo_2019-07-01_02-45-11.jpg

    cr2032, ... ~3ΞΌA consumption

    0_1562099724515_photo_2019-07-02_02-54-162.jpg



  • Love to to watch all you creative designs πŸ™‚



  • Pro version of water leak sensor, for very very hard to reach and remote places :). Version with amplifier.
    5_1562543076800_photo_2019-07-07_23-57-52.jpg 4_1562543076800_photo_2019-07-07_23-57-51.jpg 3_1562543076800_photo_2019-07-07_23-57-51 (3).jpg 2_1562543076799_photo_2019-07-07_23-57-51 (2).jpg 1_1562543076799_photo_2019-07-07_23-57-18.jpg 0_1562543076798_photo_2019-07-07_23-57-18 (2).jpg

    2_1562543243269_IMG_20190708_001841.jpg 1_1562543243269_IMG_20190708_001827.jpg 0_1562543243268_IMG_20190708_001811.jpg

    2_1562543302176_IMG_20190708_021019.jpg 1_1562543302176_IMG_20190708_020546.jpg 0_1562543302175_IMG_20190708_020504.jpg

    1_1562543394654_IMG_20190708_020335.jpg 0_1562543394654_IMG_20190708_020123.jpg
    0_1562543412041_IMG_20190708_020401.jpg
    0_1562543431708_IMG_20190708_021448.jpg


  • Hardware Contributor

    @berkseo what's the range improvement with amplifier ?
    From my experience with nrf24 the amplifier + ceramic antenna was not giving great results.



  • @nca78 said in What did you build today (Pictures) ?:

    what's the range improvement with amplifier ?
    From my experience with nrf24 the amplifier + ceramic antenna was not giving great results.

    A few months ago, when testing, I received about 200 meters of stabilized power from the power bank. While this device was tested for 30 metres. There are problems with receiving the delivery confirmation, the device is guaranteed to transmit, but does not receive the delivery confirmation(sometimes). I think it's linked to my gateway, it has the usual radio module nrf24l01+. Of course we are talking about dc-dc-mode πŸ™‚



  • @berkseo

    I do not want to be too offensive, but it seems to me as if your skills in electronics and 3D-printing is way better developed than your trust in the plumbing πŸ˜…

    Now for the serious part: how often do you experience water leaks? And how long do the batteries in this design last?

    Boozz


  • Mod

    @boozz serious water leak heppened once in 40 years



  • @gohan
    I was referring to @berkseo 's situation and images/examples. I just wondered why this person would put this amount of effort in creating a device that would probably not be functional at the moment it should be functional. I'm just thinking about corrosion of the pcb, a drained battery, change of properties of the 'sensor' due to time-effects etc.
    Do not misunderstand me: I'm absolutely enthousiastic about this device (and I'm impressed by how small it is and the design), but I'm a bit concerned about the effects that could negatively affect the behaviour of it.


  • Hardware Contributor

    @boozz said in What did you build today (Pictures) ?:

    @gohan
    I was referring to @berkseo 's situation and images/examples. I just wondered why this person would put this amount of effort in creating a device that would probably not be functional at the moment it should be functional. I'm just thinking about corrosion of the pcb, a drained battery, change of properties of the 'sensor' due to time-effects etc.
    Do not misunderstand me: I'm absolutely enthousiastic about this device (and I'm impressed by how small it is and the design), but I'm a bit concerned about the effects that could negatively affect the behaviour of it.

    You can see on the picture he already had a leak under his kitchen sink πŸ˜›
    And in some countries pipes installations are not very reliable, for example yesterday evening my dishwasher emptied on the floor because the workers did not glue the PVC pipe angle so it went away. Would have love to be warned at the first drops instead of realizing it much later when walking in water in the middle of the kitchen. I also had problem with drinkable water fountain not stopping when tank was full and emptying the 20l bottle on the floor, leaks of sinks and bathtub in the bathrooms in previous apartment, etc etc
    So there's truly a "market" for those sensors, they could also be slightly modified to make rain detection instead and warn you if rain is coming and some windows are still opened (very useful here in tropical weather when you can switch from sunny to tropical rain in a mater of minutes).

    And if you use the low power comparator of the nrf5 it uses only a few uA in sleep mode, easily detects a bit of water between the 2 contacts and can last for 1-2 years on button cell.



  • @nca78 I suspect what @boozz is referring to is not the functionality but the direct effect of water on the device.
    Pretty sure a pair of threaded socket bolts could be swapped for the cover screws and permit wall mounting on a couple of threaded SS electrodes to solve it though, and it would still make for a very compact and unobtrusive arrangement.



  • I think very useful device.
    Stainless screw like detectors - no corrosion.
    And all the time this device sits in dry area - no corrosion.
    But software must call controller ( with battery level for example ) sometimes, say one per a day, to inform it is alive.
    And if controller does not receive this message - sends alert.
    I am using this for all my nodes - very easy in Domoticz.
    If node dies, Domoticz send me e-mail ( and SMS ) with information.

    And 40 years with this hoses for example ?

    0_1562698150118_dopo-umyvadlo2.jpg

    Try it .....



  • @kimot I followed your logic until you suggested 40 years in the future with presumably failed wash hand basin umbillicals..



  • @berkseo I'm sorry if I can, but what kind of sensor are you using to detect water ?? I would like to do something like that but with an Arduino pro !!



  • @boozz A leak of water in my memory occurred two or three times. Yes, this is not a common problem in the modern world. But sometimes it is enough once. And here it is important how this leakage will be quickly detected and, accordingly, the source of water supply will be blocked. And one more thing: insurance can not cover everything. One situation is when it’s a country house, but for example in Moscow I live in an apartment on the 6th floor, that is, there are 5 floors below with apartments, and I may have to pay for repairs in these apartments.

    Now I have three sensor options: on a cr2032 battery, on a cr2477 battery, and on a 2 / AA (14250) battery with an amplifier.

    The devices consume 3 micro amperes in a dream πŸ™‚ , on conventional radio modules they consume 7–9 milliamperes while the transmission is running, for modules with an amplifier of 24–26 milliamperes, and I can programmatically decide when I should turn on the amplifier.

    2_1562761536405_IMG_20190710_142956.jpg 1_1562761536405_IMG_20190710_142942.jpg 0_1562761536404_IMG_20190710_142758.jpg



  • @boozz It was just a photo session in various locations :).

    The pcb, of course, will be coated with acrylic varnish. Stainless steel contacts are used. Conclusions do not have direct contact with the ground, there is a gap of about 0.5-1mm. Button holes are made from below, but look at how it is done in the photo. Well and places where leakage is possible, usually should not be wet, otherwise a mold and td. If there is moisture, then it is somehow better to eliminate :).
    0_1562762132793_photo_2019-07-09_12-18-34.jpg



  • @sindrome73 said in What did you build today (Pictures) ?:

    I'm sorry if I can, but what kind of sensor are you using to detect water ?? I would like to do something like that but with an Arduino pro !!

    Used by SN74LVC1G00. Recently I was asked for this scheme in myssensor_rus telegram-chat. I drew it by hand in PAINT, I can offer it to you. I apologize, but nevertheless it is a scheme πŸ™‚
    0_1562762670720_photo_2019-03-14_22-43-18.jpg



  • @zboblamont said in What did you build today (Pictures) ?:

    umbillicals

    It is rubber hoses with metal braiding.
    But rubber degrades and this equipment is the most common cause of water leakage.



  • @berkseo thanks for the scheme. but therefore don't use a sensor ?? i'm sorry noni and clear how do you detect the presence of water ...


  • Mod

    @sindrome73 the sensor is the two screws. Without water, the elevtrical between the screws is very high. With water, the electrical resistance is lower.



  • @mfalkvidd ok now I understand, and then commands an Arduino or other. thank you



  • @kimot The elastomers used are resilient and will last decades from new, never seen one burst yet. Most folks remodel bathrooms every 5-10-20 years and should replace these at the same time, which was why I chuckled at the 40 years.

    With the technology and battery longevitity available nowadays, they are certainly a handy device to have where problems have occured or may.



  • @berkseo
    Clever idea to use SN74LVC1G00 as while both inputs are same voltage it only consume ICC = 10uA (10 mircoA) in whole voltage range 1.65V -5,5V



  • @bjacobse said in What did you build today (Pictures) ?:

    Clever idea to use SN74LVC1G00 as while both inputs are same voltage it only consume ICC = 10uA (10 mircoA) in whole voltage range 1.65V -5,5V

    Power consumption of the entire device in a sleep - less than 3 mircoA.


  • Hardware Contributor

    @bjacobse said in What did you build today (Pictures) ?:

    @berkseo
    Clever idea to use SN74LVC1G00 as while both inputs are same voltage it only consume ICC = 10uA (10 mircoA) in whole voltage range 1.65V -5,5V

    Not when when you have a low power comparator available that runs with only 0.5Β΅A...



  • Wireless expansion module for very cheap soil moisture sensor from Aliexpress πŸ™‚
    0_1563480847357_IMG_20190718_030514.jpg
    0_1563480862720_IMG_20190718_023921.jpg
    0_1563480882939_IMG_20190718_030645.jpg

    MySensors | Wireless Module for Capacitive Soil Moisture Sensor v1.2 – 05:12
    — Andrew EfektaSmartBox



  • Finally the round-tuit UPS got built after the last power cut clobbered the Controller/Gateway system, lesson learned...
    Meanwell AD-55A, 7.2Ah Acid gel battery, two usb 5v buck converters, a spare socket for raw volts, and a 15 euro IP66 box from the local shops.. Some drilling and filing to the lid, couple of brackets, spare bolts, banding, soldering and hot glue...
    A bit bulky, but disappears in a void under the stairs, two tiny drill holes let the buck converter leds shine threw...
    No monitoring as yet, but sailed through a power cut this morning and the Pi didn't skip a beat.. First up is the Pi's RTC then can put the cover back on the Controller...
    0_1563789698294_20190721_074129[1].jpg
    0_1563789869238_20190722_001114[1].jpg


  • Admin

    @zboblamont is the battery and switch mode psu just in parallel? Or do you have a switchover / charge circuitry?



  • @tbowmo The Meanwell AD-55A is a purpose made 12v UPS type with all controls onboard. There is an optional version with monitoring brought out to a connector block, but I couldn't find one.
    The photo angle is misleading - Channel 1 +/- is to load, Channel 2 +/- is trickle charge to battery, power failure switches seamlessly to the battery as source..
    It's a fairly comprehensive arrangement with an array of safety features including battery protection, eg - If during power failure you disconnect the battery, it's reconnection will not restore load power, and resets only on mains supply.
    Case ventilation made using a metal bracket with a matrix of holes as a drill through template so it looks neat, but as the PSU barely gets warm to the touch it proved to be overkill.



  • @zboblamont Do you have any more info on this? Components and schematic? I am looking to do this as well as Florida is now fully into storm season.



  • @wergeld Sure, but this is where I first read about it as part of a comparative link text when I was trying to decide on a UPS after a series of outages (frequent out here in the sticks).
    The dual buck converters were the only real variation (in case one blew). Following kind advice after querying buck converters on this forum, this is the type I ordered but off eBay, but this is very similar layout... link text
    I should explain that I would have gone for a commercial UPS had a decent USB supply been quoted, but the reality is that for most the USB is of secondary consideration to backup mains...
    I gets interesting when you consider the actual Ah capacity before the battery low cutout operates, I reckon well in excess of 12 hours...
    Have fun... πŸ˜‰


  • Hero Member

    not with mysensors, but could have been: CNY70 water sensor meter (rotating wheel) with extended wifi range, the heart of it is a Particle Photon pushing to domoticz

    0_1563895501049_1e1f491c-38c1-413e-89db-0d248b38f86c-image.png



  • Today I finished printing the case. Turned out to node with sensor bme280 and e-ink display, running on nRF52840 from SKYLAB

    In one of the photos still have the sensor with bme280 working on nrf52840 from EBYTE. ...This is the previous project.
    4_1564616740093_photo_2019-07-31_23-46-16.jpg 3_1564616740093_photo_2019-07-31_23-36-20.jpg 2_1564616740093_photo_2019-07-31_23-35-07.jpg 1_1564616740093_photo_2019-07-31_16-23-05.jpg 0_1564616740092_photo_2019-07-30_20-24-08.jpg


  • Hardware Contributor

    I have soldered the first sample of "xRoom" board.
    TODO: testing and detail description of the project))

    1_1564750405850_xRoom_2.png 0_1564750405849_xRoom_1.png



  • @kalina That is some excellent solder work. Last time i tried to do SMD work it ended up being 110% solder, 5% PCB, and 0% component at the end.


  • Plugin Developer

    I didn't build this myself, but I did create the code. It's a MySensors CO2 sensor that is part of a 'privacy friendly smart home of the future' which will be launched later this year.

    0_1566575881300_Candle-CO2-sensor-by-Dinie-Besems.jpg

    It was made by artist and jeweler Dinie Besems. All her creations feature small 'skirts' that you can lift to see the data, or cover up the screen if you have visitors and don't want them to immediately see your data.


 

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