6volt backup battery circuit with auto charger

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Discussion Overview

The discussion revolves around designing a circuit for a 6-volt backup battery system with an automatic charger, intended to maintain power for LAN switches during power outages. Participants explore various approaches, including the use of lead-acid batteries, UPS systems, and solar power, while addressing the need for a standalone solution due to the distance between switches.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Experimental/applied

Main Points Raised

  • One participant requests a circuit that can charge a 6V battery while powering a switch, with a mechanism to prevent overcharging.
  • Another participant suggests considering standard UPS equipment as a potentially cheaper alternative to building a custom solution.
  • A different viewpoint proposes using a 6V lead-acid battery and a charger with a float mode, noting the need for equipment that can handle slightly higher voltages during charging.
  • One participant emphasizes the challenge of using a single UPS due to the distance between switches, advocating for a standalone system instead.
  • Another suggestion involves using a solar panel to trickle charge the battery, contingent on the practicality of solar power in the participant's location.
  • One participant proposes using line power for the switches to simplify the power setup.
  • A later reply points to a specific battery charger project, suggesting modifications for compatibility with a 6V battery.

Areas of Agreement / Disagreement

Participants express differing opinions on the best approach to achieve the desired backup system. There is no consensus on a single solution, as various methods are proposed and debated.

Contextual Notes

Participants mention the need for a charger that can effectively manage battery charging without overcharging, as well as the requirement for the system to function independently over a significant distance.

saad ahmed khan
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hello every one!

due to frequent power outages in my area, the lan switches at different locations stop working.

so either the light is out or the switch is not working which is really irritating.

so can some one help me with a circuit that can supply 6 volts for the switch in case of power outage?

what i want is a circuit that runs of ac and charges a 6v dc battery while simultaneously running the 6 volt switch. when the light goes out the battery then should power the switch.
also their should be some way to prevent the battery from over charging.

regards,
saad
 
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Have you considered standard UPS equipment.
Might be cheaper than making your own.
 
Or just a 6v lead acid battery (eg motorcycle battery) and a charger.
Most decent chargers have a floatmode where they keep the battery topped up.
Your equipement would have to be able to withstand the 7V the charger would supply while charging but most will.

+ Smaller and wastes less power than a UPS+6v dc adaptor.
- Might be tricky to find a 6V battery with a large enough capacity if you need it to run for many hours.
 
the switches are on poles about a km apart. i caNT USE one ups and drag its wire for the whole distance. i want a stand alone system

i intend to use a bike battery. i want to make make own charger though coz i can't find any good quality ones locally.
 
If the hardware can survive having slightly more than 6V supplied to it I would just use a 6v lead acid battery and a solar panel to trickle charge it.
Are you in a country where solar power is likely to be practical?
 
It may be possible to use line power for the switches.
This way you only need one power setup.
 
solar power is in plenty.. solar cells are NOT.

i want to use the mains to charge the battery as well as run the switch.

and when the mains fail then i want the battery to run the switch..

you people are not getting my point exactly.
 

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