I have been travelling quite a bit for the last year or so and have not been able to drive my car as frequently as I would have liked. As a result, I often left my car at the airport parking lot for a week at a time… a constant current draw along with lead-acid battery’s relatively high self-discharging rate create a perfect recipe for a drained battery if the car is left parked for some prolonged period of time.
On a few occasions my car struggles to start when I return from my business trip and I had to charge the battery manually later on by hooking up a charger, which was quite inconvenient. So I decided to make a simple solar trickle charger that can be left inside the vehicle and charge the battery while the car is parked.
Kerry used a AcoPower 10W solar panel that has has an maximum open-circuit output voltage of 22V and a maximum output current of 0.6A. On a clear winter day, the panel can generate approximately 150mA charging current. The solar panel is connected to an OBD-II battery saver connector with a cigarette lighter adapter.
8-6-2021 (August 6, 2021) is the Snakiest day of the year and it’s also this year’s CircuitPython Day! The day highlights all things CircuitPython and Python on Hardware. See you there!
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.