hi guys,

i try to make an automatic transfer switch dc for router 9VDC / 0.6A here. I want to switch automatically the power source from router adaptor to battery(power bank) that i set for power backup. and changing back when the router adaptor get an electricity again.

i can't find the most suit design for this case. i just found automatic switch turn on led when dark, that it's far from i need.
i just thought that 2 relay can operate this, but i dont know the desaign.
please help me to build this, i just try what i can.

 

hi G,
Have you considered using a couple of diodes.?
E

 

hi G,
Have you considered using a couple of diodes.?
E

No, but someone says it can be build with schottky diode or relay. Could you please help me for this???

 

 

View attachment 197459

What types of schottkey diodes can be used for this desaign?

 

hi,
I would use a 20V, 2A rating Schottky diodes eg: DFLS220L or similar.
E
https://www.mouser.co.uk/Semiconduc...Diodes-Rectifiers/_/N-ax1mj?P=1yuoc5pZ1yuoc7m

 

hi,
I would use a 20V, 2A rating Schottky diodes eg: DFLS220L or similar.
E
https://www.mouser.co.uk/Semiconduc...Diodes-Rectifiers/_/N-ax1mj?P=1yuoc5pZ1yuoc7m

Is it work well for my router with 9v and 0,6 a??

 

Hi,
It is rated at 20Vdc reverse voltage with a current rating of 2Amps.
Your requirement of 9Vdc at 0.6Amp is well within the rating of that diode, OK.
E

 

Hi,
It is rated at 20Vdc reverse voltage with a current rating of 2Amps.
Your requirement of 9Vdc at 0.6Amp is well within the rating of that diode, OK.
E

Thanks a lot bro, i will work with it