| Ever wondered how a solar-powered lamp powers an LED with just a single 1.2 V cell? A closer look reveals a clever single-transistor voltage...
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PREMIUM
| Want to test batteries or solar panels? You need a load resistor. With this electronic load resistor project, you can not only simulate a lo...
PREMIUM
| If your notebook has dead batteries — perhaps no longer commercially available — or a failure on the charging circuit, this notebook power b...
PREMIUM
| Connecting dropping resistors in series with resistive loads often leads to significant energy dissipation. In AC circuits, using dropping c...
| This project offers a way to power portable Raspberry Pi-based devices using a rechargeable battery. It includes a system that supports head...
| Getting electricity from the sun in the way that best suits your needs requires knowledge of the technologies and appropriate use of the ele...
| Lithium coin cells in the 2032 format and similar batteries are commonly used as “keep-alive” energy sources to maintain data and keep clock...
| It may seem unbelievable, but in the midst of the microcontroller era, taper battery chargers are still on the market. They are basic, very...
| In the EU and California, USB-C power adapters are now mandatory for cell phones and many other portable devices. So if you need some power...
| In the previous installment, we described how a taper battery charger works and how to protect it. In this second part, we’ll see how to add...