Hi Vasile, Isn't something like this a challenge for the JAL world, isn't it much more fun to build yourself than to buy? regards Hans
Op zondag 10 juli 2022 om 11:26:02 UTC+2 schreef vasile: > :) :P > These have Chinese controllers for sure! > The time investment is equal to the know-how you will acquire, so it is > invaluable. > > The simplest way to do it is in a pure analog way, using a four quadrant > analog detector with LDR of photodes. This is simple, being simple it > works, the only issue you will have is to keep it dry. You still need a > microcontroller to drive the motors at defined moments of time ( to avoid > useless power consumption all the time) and to "park" easily your tracker > on heavy rain and storms. > > The most complex way is to do it in a pure digital way, input is the GPS > coordinate, computing the sun trajectory for that coordinate and add a > correction table for each day of the month. Such a device already made (EU > product) is about 300 euro, I would say is not expensive for your > capitalist world. :) > > best wishes > BTW, after you tracker works you may propose to the owners of the > neighborhood park to make them work too. :) > > > On Sun, Jul 10, 2022 at 11:12 AM hans <[email protected]> wrote: > >> Hi Vasille, >> I completely agree with you that a control on two axes and an MPPT >> charger for the battery is the best, but the question is how much >> investment it entails compared to the yield. Here's a picture of the park >> near us where the panels have had irregular positions for years. Even this >> “professional” approach makes me raise my eyebrows. All in all, it's still >> fun and educational. >> regards >> Hans[image: 20220630_114118.jpg] >> >> Op zondag 10 juli 2022 om 09:43:45 UTC+2 schreef [email protected]: >> >>> Very nice Hans and good to see that it works. >>> >>> You should start a solar farm 🙂 >>> >>> Kind regards, >>> >>> Rob >>> >>> ------------------------------ >>> *Van:* [email protected] <[email protected]> namens hans < >>> [email protected]> >>> *Verzonden:* zaterdag 9 juli 2022 17:35 >>> >>> *Aan:* jallib <[email protected]> >>> *Onderwerp:* Re: [jallib] sun power use >>> >>> Hello all, >>> >>> Here is the solar panel I will be using. I just went back to 12 volts >>> and a small lead acid battery. One motor drives the axis that is parallel >>> to the Earth's axis and follows the sun. Actually the screen should go 24 >>> degrees up (June) and 24 degrees down (December) but I did some >>> measurements and the gain is too small for me to do anything about it. >>> >>> Anyway, Jal lets things run smoothly again and now we just have to wait >>> and see if the weather gods accept this thing. >>> >>> regards >>> >>> Hans[image: zon_set.jpg] >>> >>> Op woensdag 29 juni 2022 om 17:28:57 UTC+2 schreef hans: >>> >>> Hello >>> Kiste >>> I still have to come up with something to switch off in time due to too >>> low voltage, but you did wake me up. Thank you. >>> Vasile >>> Years ago I had a larger solar panel rotate with the sun. I did the >>> incline manually. However, the rotating construction must be very heavy and >>> in a big storm I was only just able to save the case >>> Near us there is a park with 12 such panels, it was always surprising >>> that they are never all in the right direction. A technician in this field >>> told me that the added value in yield is almost lost at the cost price of >>> the installation and that they now just use fixed panels. >>> And nevertheless it is very nice to be working on this. The application >>> of the MPPT is again its news for me. >>> thanks everyone >>> regards >>> Hans >>> >>> Op woensdag 29 juni 2022 om 16:22:16 UTC+2 schreef vasile: >>> >>> About keeping up with consumption, PV has to (i) charge the battery and >>> (ii) supply your board. >>> If you really want to try something new, then a two axis tracking system >>> will improve your charging by about 40% with the same PV. >>> Why? Because the PV will stay oriented to the sun, except for minor >>> clouds and heavy rain when everything will be disintegrated :) >>> >>> https://www.banggood.com/Smart-Solar-Tracking-Equipment-Maker-Project-DIY-Kit-Technology-for-Arduino-p-1952195.html >>> >>> >>> >>> On Wed, Jun 29, 2022 at 4:39 PM 'Oliver Seitz' via jallib < >>> [email protected]> wrote: >>> >>> Hi Hans, >>> >>> it's true, you don't need to worry about charging, but you do need to >>> worry about stopping discharging. LiPos may explode if overcharged or >>> over-discharged. The device you've bought has both- charge and discharge >>> controller. But, with your extra wires, you're discharging the LiPo >>> directly without the discharge controller. That is ok, if you're really >>> sure the LiPo will never go empty. If you're not so sure about that, you >>> would need a way to stop discharging at a certain voltage, like 2.6V. >>> Really switching electronics off to only keep drawing few nanoamperes is >>> possible, but not always easy. >>> >>> Greets, >>> Kiste >>> >>> Am Mittwoch, 29. Juni 2022, 12:34:35 MESZ hat hans < >>> [email protected]> Folgendes geschrieben: >>> >>> >>> Hi Rob, >>> The set has both a solar panel and a lipo battery, so I don't have to >>> worry about charging. I'm just curious if the solar panel can keep up with >>> the consumption. I can also charge it via USB. >>> By the way very nice to see a project, most of the contributions are >>> very abstract. >>> Kind regards >>> Hans >>> >>> Op woensdag 29 juni 2022 om 11:44:28 UTC+2 schreef [email protected]: >>> >>> Hi Hans, >>> >>> Don't make it more complex than it is. An MPPT (Maximum Power Point >>> Tracking) is used on solar panels to get the most out of it but you do not >>> have to add such a device. >>> >>> If I am right a Lipo battery needs a certain way of charging and so you >>> need a special Lipo battery charger. >>> >>> I made a Cat repellent some time ago using a small solar panel. And >>> since I am using three NiMh batteries (so 3.6 Volt) I use a small charging >>> current for keeping the batteries charged. The batteries are connected to >>> the solar panel only via a diode (Shottkey in this case because it has a >>> low voltage drop). >>> >>> For your info. You can find the schematic diagram here: >>> https://www.instructables.com/Cat-Repellent/ >>> >>> Kind regards, >>> >>> Rob >>> >>> ------------------------------ >>> *Van:* [email protected] <[email protected]> namens hans < >>> [email protected]> >>> *Verzonden:* woensdag 29 juni 2022 11:22 >>> *Aan:* jallib <[email protected]> >>> >>> *Onderwerp:* Re: [jallib] sun power use >>> Such a prompt response! I bought a solar charger with a built-in 5000mAh >>> battery. It delivers a beautiful 5 Volt but with a minimum load of 150 mA. >>> Opened the case and the lipo delivers 3.5 Volts. So I soldered a few more >>> wires to it. Hence my question. It's still so much fun. >>> Now i have to discover what a MPPT is. >>> regards >>> Hans >>> >>> Op woensdag 29 juni 2022 om 09:59:30 UTC+2 schreef [email protected]: >>> >>> Hi Hans, >>> >>> Most PICs can operate at 3 Volt, below a screenshot from the datasheet. >>> I only use F versions. >>> >>> >>> Just check the datasheet for the PICs that you have. >>> >>> I have done several projects using a PIC that is supplied by batteries >>> so operating at 3 Volt or lower. >>> >>> What I do not know for sure if when you program the PIC if it should be >>> at 5 Volt, maybe only if you use Low Voltage Programming, so I normally >>> program the PIC when it is connected to a 5 Volt power supply but in the >>> application it can run even on a supply voltage as low as 2 Volt. >>> >>> If you have peripherals that work at 5 Volt you could always use a >>> step-up converter to step-up the power supply from 3 Volt to 5 Volt. >>> >>> Kind regards, >>> >>> Rob >>> >>> ------------------------------ >>> *Van:* [email protected] <[email protected]> namens >>> vsurducan <[email protected]> >>> *Verzonden:* woensdag 29 juni 2022 09:11 >>> *Aan:* [email protected] <[email protected]> >>> *Onderwerp:* Re: [jallib] sun power use >>> >>> You may continue to use it at 5V if the energy extracted from the PV is >>> drawn via a MPPT ( maximum power point tracking) IC and your solar panel >>> assures the current needed for your electronics. Many panels have 6V open >>> at 0.3A or 0.5A short circuit current >>> Actually any actual PICmicro will run on 3.3V ( including those rated >>> for 5V) if the internal oscillator is set to maximum frequency intended >>> only for 3.3V. Most of the low power PICs ( LF series) will run down to >>> 2.2V ( some down to 1.8V) so you may connect the solar panel directly on >>> your LDO without MPPT or PWM. >>> best wishes >>> >>> On Wed, Jun 29, 2022 at 9:57 AM hans <[email protected]> wrote: >>> >>> Hello all, >>> I don't want to reinvent the wheel. >>> Until now I have always used 5 volts supply voltage, but because of a >>> solar panel I would like to work on 3 volts. Which processors should I use >>> and what should I pay attention to? >>> Thank you in advance, >>> greetings Hans >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "jallib" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/jallib/3220a563-f63f-435b-b0a6-c088cc777aaen%40googlegroups.com >>> >>> <https://groups.google.com/d/msgid/jallib/3220a563-f63f-435b-b0a6-c088cc777aaen%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "jallib" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/jallib/CAM%2Bj4quz-mvFLM7nuWmPg0YBcQCGNLDqw09bJMr%3DbKpmALa9TQ%40mail.gmail.com >>> >>> <https://groups.google.com/d/msgid/jallib/CAM%2Bj4quz-mvFLM7nuWmPg0YBcQCGNLDqw09bJMr%3DbKpmALa9TQ%40mail.gmail.com?utm_medium=email&utm_source=footer>. >>> >>> >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "jallib" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/jallib/b59b60f5-848e-4d33-b9d9-a6bc2b872dabn%40googlegroups.com >>> >>> <https://groups.google.com/d/msgid/jallib/b59b60f5-848e-4d33-b9d9-a6bc2b872dabn%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "jallib" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> To view this discussion on the web visit >>> >>> https://groups.google.com/d/msgid/jallib/16197ba2-f8db-441f-865b-3acd184f4d7en%40googlegroups.com >>> >>> <https://groups.google.com/d/msgid/jallib/16197ba2-f8db-441f-865b-3acd184f4d7en%40googlegroups.com?utm_medium=email&utm_source=footer> >>> >>> . >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "jallib" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/jallib/366793553.5677601.1656509982227%40mail.yahoo.com >>> >>> <https://groups.google.com/d/msgid/jallib/366793553.5677601.1656509982227%40mail.yahoo.com?utm_medium=email&utm_source=footer> >>> . >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "jallib" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/jallib/675be8f1-9300-4934-8467-1466f4faf675n%40googlegroups.com >>> >>> <https://groups.google.com/d/msgid/jallib/675be8f1-9300-4934-8467-1466f4faf675n%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >> -- >> You received this message because you are subscribed to the Google Groups >> "jallib" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> > To view this discussion on the web visit >> https://groups.google.com/d/msgid/jallib/dc051144-9ba0-414f-9009-e87515fdbe40n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/jallib/dc051144-9ba0-414f-9009-e87515fdbe40n%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- You received this message because you are subscribed to the Google Groups "jallib" group. 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