![](https://scienceprog.com/wp-content/uploads/2020/12/offline_ACtoDC_5v.jpg)
This simple power supply circuit can reduce the voltage from 20vac to 120vac into 5 volts DC and provide current up to 100mA. [Link]
This simple power supply circuit can reduce the voltage from 20vac to 120vac into 5 volts DC and provide current up to 100mA. [Link]