I want to power my project(AVR uC + RF transceiver) with a fake iPhone charger whose internal is the same as this one, but with a smaller input and output capacitor. I therefore suspect that the output will be similar: source (under Counterfeit iPhone)
The oscilloscope traces show the output signal (yellow) and frequency spectrum (orange). The left images provide high-frequency information on the output voltage. The right images show the low-frequency information on the output voltage.
How to smooth the output? Bigger input and output capacitors, buck converter, filter or extra rectifier + filter stage?