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.
