This is a DC Uninterruptible Power Supply (UPS) for router and printer using capacitors instead of battery.
It running the load for very short time (seconds) to solve the problem of ATS delay time.
Parts list:
Capacitor 150uF 450V or 400V (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:
Watch the Video:
