Super! :) cool. Maybe expand this stuff to a 1Kw system and two axes? Then you will face many other issues like the voltage/current measuring errors existing in ALL chinese MPPT devices? best wishes,
On Sat, Jul 9, 2022 at 6:35 PM hans <[email protected]> wrote: > 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. 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