Prototype tested with USB power input (5V) from a laptop, and external dc input (6V) from a lab power supply. Charging current for the battery (3.7V/1100mAh LiPo) is programmed to about 500mA using ...

How does a precision 10v and 5v output with only ±0.025% and an ... actually uses some ebay parts to pull off this build. The LiPo battery, USB LiPo charging circuit, and boost regulator are ...

LILYGO T-Embed SI4732 is an ESP32-S3 development board with an AM/FM radio, a TFT display, a rotary encoder, a built-in ...