The following post which causes a 20 cell phone charger station utilizing solar power.
In accordance with me, putting together the whole station making use of ready made units could well be significantly better idea rather than creating the particular circuits. This method is going to be faster, simpler and will stay away from a lot of problems which can be frequently an important part of producing techniques.
The cell phone charger necessity could be worked out by picking out and setting up 20 nos. ready made cell phone chargers and by hooking up their mains inputs in parallel to a small solar inverter.
Charging a cell phone Li-Ion battery can be extremely crucial and needs high grade smart chargers with auto shut-off abilities for charging them easily.
Processing this kind of smart charger needs a number of expertise and experience, so I will not likely suggest providing these units.
Rather than 20 nos. used cell phones might be obtained (example NOKIA1280) and can be utilized as Li-Ion battery holders cum chargers.
All mobile phones have an incorporated smart charger which charge the required battery with greatest treatment and instantly close off the method when the charging is finished. The display offers the needed info with a beep sound once the charging is done, so that's a cool way of charging the Li-Ion batteries without taking any risks.
The cellular phones can be utilized generally while they are not getting used for charging the above batteries.
The following block diagram shows the various phases which may be used for putting in 20 solar powered cellular phone station:
The first four blocks signify a regular solar electrification set up. The solar panel voltage is first designed to the preferred battery voltage by means of a solar charger/controller module.
The output from the solar module is then given to an inverter battery for charging it.
The charger/controller immediately removes the charging of the inverter battery when it's fully charged and resumes when it gets to the under charge threshold level.
The battery is utilized for traveling the inverter at any time needed.
The output of the inverter is employed for charging the offered mobile phones and the Li-Ion batteries.
20 cell phones would certainly approximately utilize 20 to 30 watt hour of power, so a 100 watt inverter would probably properly work the purpose.
A 40 AH car battery is advisable right here, which might cheerfully fulfill the 5 day autonomy demand.
The solar panel is not at all important below, a 60 watt panel owning an open circuit voltage of 30V and a short circuit current of 3 amps will likely be quite well suited for the current application.
The solar charger/controller is the only devices which might be produced at home. I have by now mentioned the kind of circuit in this post, which can be efficiently raised for the existing application (the transformer ought to be changed by the solar panel terminals).