The USB Charger Doctor holds an OTP microcontroller, Voltage and Current Sensors, and one 7-segment LED display unit. The internal electronics is powered by an onboard voltage regulator, which ...

Two simple USB inventions provide an easy way to test USB cables and chargers, ensuring they are functioning properly. The first invention uses a small plastic ball and a USB female connector to ...

Build a 3.7v lithium ion battery charger circuit with this easy to follow tutorial (with schematics and diagrams). Visit To Learn More.