Onoff
In the land of the unfinished project I am King!
- Messages
- 10,159
- Location
- Sevenoaks, UK
Just had one of our not infrequent power cuts. It used to be really common here so I bought a cheap petrol, 2.3kVA gennie & a changeover switch with good intent.
It sat there then the power cuts stopped, for years. I decided one day to fire up the gennie and found the capacitor dead straight out of the box. Replaced that.
I've used the gennie once in a power cut to back feed the ring via a widow maker lead.
Now the gennie is buried, I nicked the capacitor anyway for my radial arm saw. God knows where the changeover switch is, on a shelf somewhere!
Anyway, tonight's power cut, off for a couple of hours. OK the house is going to get a bit cold.
Tbh, for a couple of hours, just having the BT router going would be good to keep the kids happy.
I got to thinking...router PSU is 12V/1500mA. Could I use a 5Ah, 18V Li-ion battery? As in run it through a DC to DC converter, drop to 12V and limit the current?
Last time I played with anything like this I built a PSU based around an L200.
Then again I've a 19", deep, rack mount UPS scored years ago. Guessing it just needs new batteries. Put it this way I can barely lift it. Must go 50kg.
In the short term though I'd like to look at the 18V battery idea.
Any thoughts appreciated!
It sat there then the power cuts stopped, for years. I decided one day to fire up the gennie and found the capacitor dead straight out of the box. Replaced that.
I've used the gennie once in a power cut to back feed the ring via a widow maker lead.
Now the gennie is buried, I nicked the capacitor anyway for my radial arm saw. God knows where the changeover switch is, on a shelf somewhere!
Anyway, tonight's power cut, off for a couple of hours. OK the house is going to get a bit cold.
Tbh, for a couple of hours, just having the BT router going would be good to keep the kids happy.
I got to thinking...router PSU is 12V/1500mA. Could I use a 5Ah, 18V Li-ion battery? As in run it through a DC to DC converter, drop to 12V and limit the current?
Last time I played with anything like this I built a PSU based around an L200.
Then again I've a 19", deep, rack mount UPS scored years ago. Guessing it just needs new batteries. Put it this way I can barely lift it. Must go 50kg.
In the short term though I'd like to look at the 18V battery idea.
Any thoughts appreciated!