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Author Topic: how to convert power from the mains ?  (Read 621 times)

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Offline shyamgeniousTopic starter

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how to convert power from the mains ?
« on: March 17, 2011, 09:20:48 PM »
hey guys/gurls
this post is for my upcoming robot and i need to charge some very sensitve li-batteries with steady voltages.
how can i convert the electricity from the mains to useable battery voltage like some 9 volt??
do i use resistors? i need to test run my motors and need to check servoswith eltricity and am awaiting shipment so plz help to the earliest.

regards
shyamgeni
The wise only need a hint to know whats going on.The fools cannot understand even if its given in writing.You decide-
 which are you?

regards,
ShyamGenious

Offline waltr

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Re: how to convert power from the mains ?
« Reply #1 on: March 18, 2011, 07:25:12 AM »
Do NOT use resistors as there will not be the isolation needed for safety. We don't want you to get electrocuted.

The easiest and cheapest is to buy a Wall Wart AC to DC power supply or use one from some electronic device that is now dead.

How much current at 9Volts do you need?

Offline shyamgeniousTopic starter

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Re: how to convert power from the mains ?
« Reply #2 on: March 18, 2011, 11:00:29 AM »
Do NOT use resistors as there will not be the isolation needed for safety. We don't want you to get electrocuted.

The easiest and cheapest is to buy a Wall Wart AC to DC power supply or use one from some electronic device that is now dead.

How much current at 9Volts do you need?
:o i definitely dont wanna get electrocuted :-X  :'(  ??? but can you elaborate upon the term electronic devices?? do i get the conversion unit from electrical devices?as i have opened many electrical devices and have some experience is the wiry thingy used in battery chargers the ac-to-dc converter??i hav a big transformer exactly....il tell you tomorrow how many volts but till then plz answer my bove Qs
 
rgeards
shyamgeni
The wise only need a hint to know whats going on.The fools cannot understand even if its given in writing.You decide-
 which are you?

regards,
ShyamGenious

 


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