"Good day Sir,
I am so interested on your DC to DC for
cellphone charger circuit . But I could order the complete mobile
charging circuit from you because I can find other parts locally (solar
panel, battery charger and batterry). How much this can cost me? this is
for solar mobile phone charging station to charge up to 4 cellphones at
Could you also build mobile charger circuit that can support up to 20 mobile
phones at once for charging?
the other hand , can you build a battery cellphone charger circuit
using up to 20 pieces of universal battery charger, this solution would
be charge most mobile phone battery available in the whole market?
A prompt answer would be appreciated .
I appreciate your interest and business.
costs will depend on the quantity of the order, kindly let me know what
will be your minimum quantity. once I know that I'll be able to
calculate the costs.
I'll be able to make all that you have requested, won't be a problem for me.
Awaiting your kind reply!
solar mobile phone battery charging system. the finished product would
be assembly locally.
days(if this is not sun). Please tell me the size of the solar panel,
battery charging circuit, battery and mobile charger circuit board. so i
would need as start about 30pieces to 50 pieces of mobile charger
circuit board. for each output, i would like to use multi charge usb
retractable cable( 10 connectors), also send me the cost of cable
mobile phone at once. Autonomy 5 days. Please tell me the size of the
solar panel, battery charging circuit, and the universal battery charger
circuit board. tell me the type of DC universal battery charger that i
will need. so i would need as 30 pieces to 50 pieces of universal
battery charger circuit board and 50 pieces of DC universal battery
charger. the finished product would be assembly locally.
Mr. Bertini Monthe
I can suggest you a simple and effective way of completing this project
with minimum hassles.
Yes you can go ahead with your own suggestion. As soon as you finish
with the design, kindly send me the link of your blog for me to view the
Manufacturing such smart charger requires a lot of expertise and experience, so I won't recommend making these units.
Instead 20 nos. second hand cell phones may be procured (example NOKIA1280) and may be used as Li-Ion battery holders cum chargers.
All cell phones have a built-in smart charger which charge the involved battery with utmost care and automatically shut off the process when the charging is completed. The display provides the necessary information with a beep sound once the charging is completed, so that's a cool way of charging the Li-Ion batteries without taking any risks.
The cell phones may be used normally when they are not being employed for charging the above batteries.
The output from the solar module is then fed to an inverter battery for charging it.
The charger/controller automatically cuts off the charging of the inverter battery when it's fully charged and resumes when it reaches the under charge threshold level.
The battery is used for driving the inverter whenever required.
The output of the inverter is used for charging the proposed cell phones and the Li-Ion batteries.
20 cell phones would roughly consume 20 to 30 watt hour of power, so a 100 watt inverter would adequately serve the purpose.
A 40 AH car battery is recommended here, which would happily satisfy the 5 day autonomy requirement.
The solar panel is not very critical here, a 60 watt panel having an open circuit voltage of 30V and a short circuit current of 3 amps will be quite suitable for the present application.
The solar charger/controller is the only equipment that may be manufactured at home. I have already discussed one such circuit in this 3 step charger circuit article, which may be effectively employed for the present application (the transformer should be replaced by the solar panel terminals).