This is a DC UPS for router and printer using capacitors instead of battery.
It running the load for short time (seconds) to solve the problem of ATS delay time.
Parts list:
Capacitor 150uF 450V (11pcs)
Resistor 100 ohm 25 watt
Resistor 100K 0.25 watt (2pcs)
LED 5mm
Diode 10A10
Bridge rectifier D35SB100
Connector HB-825
AC Fuse 10A
DC fuse 10A
Socket SS-801 (2pcs)
Circuit:
You can order the PCB from PCBWay:
https://www.pcbway.com/project/shareproject/DC_UPS_for_Printers_and_WiFi_Routers_57e49864.html
Formula to calculate the running time depend on the load and size of the capacitors:
Video:
