Cheap and simple Solar Power for our small Projects (ESP32, ESP8266, Arduino)

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Adding cheap and simple solar power to our small outdoor projects (e.g. ESP32, ESP8266, Arduino Pro Mini) removes the need to save energy or recharge batteries. Today we will enhance a simple 50 cents Li-Ion charger board to do exactly that.
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Links:
ESP32 WROOM : https://s.click.aliexpress.com/e/_AqoIE1
ESP32 PCB (different color) : https://s.click.aliexpress.com/e/_ABYXuD
Solar panel 6V : https://s.click.aliexpress.com/e/_9xQ3CD
Solar Panels 5 – 5.5V : https://s.click.aliexpress.com/e/_AfVbIz
Voltage Regulator HT7333 : https://s.click.aliexpress.com/e/_ADLhEl
Schottky Diodes (used 1N5819) : https://s.click.aliexpress.com/e/_AXOsKv
FQP27P06 : https://s.click.aliexpress.com/e/_A5T7oh
Explanation of Power Path: https://youtu.be/T70mBHeIOZA

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22 thoughts on “Cheap and simple Solar Power for our small Projects (ESP32, ESP8266, Arduino)

  • May 16, 2021 at 8:10 am
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    How high the temperature can go inside that "IKEA glass dome"? 🙂 Will the battery survive?

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  • May 16, 2021 at 8:10 am
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    The MCP73871 is a complete solar charger with all the bells and whistles needed in your project Andreas… Adafruit has a board with it.

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  • May 16, 2021 at 8:10 am
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    I thought of doing this, but I actually went with a 6v panel charging 4 NiMH batteries and a voltage regulator. it has worked for years! I was powering an ESP8266. You could also use the bluetooth on the ESP32 for an on time of less than a second, to lower the power drain too. Or, as I did, use a Lora transmitter (just for fun).

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  • May 16, 2021 at 8:10 am
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    An overkill solution can be the PS-BC12111 its a MPPT controler plus 3S 18650 BMS integrated

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  • May 16, 2021 at 8:10 am
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    Very usefull indeed and nicely explained. Pure entertainment on Sunday mornings. What else….

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  • May 16, 2021 at 8:10 am
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    Thanks….very..very interesting…Great Andreas !!! — 73 de Paolo IW3GPO Jn65Dk Venice Isl.

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  • May 16, 2021 at 8:10 am
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    Thanks for this great video. For all my sun powered project, I am using the mppt charger/balancer PS-BC12111 also including a bay for 3 x 18650…. Works flawless…. and cheap.

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  • May 16, 2021 at 8:10 am
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    I think you'll get much more power out of the solar panel if you keep it outside the glass box.

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  • May 16, 2021 at 8:10 am
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    Thanks Andreas, I’ve been struggling using a tp4056 for a solar project, reckon this is the solution! Perfect…

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  • May 16, 2021 at 8:10 am
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    Can you make solar panel using monocrystalline cells for above project with flexibility?

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  • May 16, 2021 at 8:10 am
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    Good video. Damn, it arrived a week after I had used an identical circuit with 2 Schottky diodes and missed the pro solution. Still, mine looks nicer! Next time…

    Reply

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