2022年5月20日 · DIY DC UPS for router « on: May 20, 2022, 07:19:06 pm » I've been trying to design an uninterruptable power supply for a router that is supplied by a 12V dc power brick.

2021年10月20日 · Re: diy 12V ups questions « Reply #5 on: October 25, 2021, 04:15:36 pm » I've had a stupid charger/powersupply adjusted to 13 V connected to a small 12V lead battery for 6 years now, driving router, wifi access point, network switch, modem and a raspberry pi (using a 12V to 5V DC converter) for 6 years.

2020年8月5日 · Yeah, power the DUT from the UPS, just disconnect the internal ground going to the output socket to make it fully isolated. In my case I installed a 24V 20A switching power supply inside the UPS. I got it for free, as well as the UPS. They were both headed for the scrapyard. It supplies fairly well regulated voltage for the UPS to use.

2012年10月19日 · Re: Raspberry Pi server with diy UPS « Reply #22 on: March 04, 2015, 04:02:57 am » Hi Daniel; I see that this thread is a little dated but your circuit is very nice and I'm interested in a backup for my RPI Sprinkler Controller.

2024年6月20日 · What I have now is an "DIY" UPS I have put together with external batteries, an RV charger/converter, and an inverter. This thread is about me trying to get rid of the inverter. I chose SLA instead of LiFePO4 because they're lower cost and a better fit for this exact use case. They're heavier, but they'll sit on a shelf their entire life.

2018年2月26日 · And a 2 kVA output UPS at 70% efficiency is dumping 850 watts of heat out all day long if it's at full load. On voltage: 48V is the absolute minimum. I had a 5 kVA UPS that ran 240V DC (20x 12V 7Ah batteries), with a big-ass boost converter.

2021年5月10日 · The UPS supplies have relays that close when the AC goes down to trigger a PLC or some kind of warning indicator. I had the idea of feeding one of the 12V batteries through the AC OKAY relay to my 12V rail so that the battery supplies the 12V rail only when AC is down.

2024年1月13日 · The immediate use case for this is to replace an RV-style converter charger I have as part of a cobbled together DIY UPS. It's a double conversion architecture, so the converter-charger (and my new device), will first charge the batteries and then deliver stay at a "float" charge while delivering up to 20A at 24VDC that floats the battery bank ...

2020年3月27日 · Hi I am using a 3s BMS board for my battery pack to make it use as a DIY UPS from my modem. So I need to plug in the charger adapter to the battery pack and battery pack output is connected to modem always.

2018年7月30日 · Re: Using mosfet as efficient diode (Making an UPS) « Reply #3 on: July 30, 2018, 05:22:13 am » Alright I think I have it: If I do that, the mosfet will be on as long as long as the supply voltage is under 13V (needs to be adjusted), and if the voltage exceeds 13V then the bjt turns on and the gate voltage to the mosfet drops, turning it off.