This is a small power supply for the RF filter block project.
It takes a single 18650 cell and outputs a regulated 3.0V supply. The board also contains a cell protector.
The protection IC is a BQ29700DSER that will disconnect the cell if it’s charged over 4.275V or over-discharged under 2.800V.
The protected cell output is available on the two connection posts for easy charging
The schematic is simple – the datasheet application for the protection IC + the 3.0V LDO: 1s_board.pdf
As usual, the entire project is available on github:18650_1s_board