Currently I am preparing the bird nest cam. The ESP32 cam can be powered on two levels: On 3.3V or on 5V. In several articles on the web I found the information that the ESP32 Cam does sometimes not work properly when powered on 3.3V. Therefore I decided to power it on 5V. The LiPo cells of my old MacBook deliver 3.7V. So I needed a step up converter also called boost converter.
Covid makes us still stay at home. Meanwhile we are allowed to leave home, but where shall we go? As the number of possible opportunities is limited, I had an idea of a nice little project with my kids: A soap bubble machine!
We took some parts of the Arduino starter kit and some Lego bricks and a few hours later it was finished.
I found my 2007 MacBook in the attic and took it apart
I will try to re-use as many components as possible in my future projects, but first I’ll have to learn more about Apple’s components. I started with the battery. In its case are 6 LiPo cells. Unfortunately two of my cells are damaged, but that means 4 are left for further usage. Currently I am trying to charge them with the help of a TP4056 board and a 6V 200 mA solar panel. But to gather more data, I first needed to build a data logger.
The four remaining cells are in a good condition. It did several tests with them. I will use at least one of them as battery for my ESP32 cam.
Meanwhile I ordered a HDMI board at Amazon (LCD/HDMI-Karte für 12,1 Zoll / 33,8 cm B121EW03 V2 LTN121W3-L01 LTD133EX2X B133EW01 V4). With the help of this board I am able to use the display of my old MacBook as monitor of a Raspberry Pi4. I will build an Magic Mirror with those components.