set your multi-meter in current measuring mode and connect your meter in series between charger and mobile. Remember to connect charger with mains :razz:
if you can't able to get nokia 3310 then switch to other mobile and charger to complete your task.... without mobile you can't measure current as i mentioned reason in my previous post.... :?:
if you want to use waste product for your research then you should have good knowledge of electronics because risk is always there...... you can use battery instead of mobile but again risk is there........over current charging of battery is very dangerous it may harm you very badly..... in beginning don't take risk like that......
Hello sir
Please tell how to measure current out of a mobile charger with no label on it with the help of a simple digital china made multimeter :roll:
This can be done on elegant way.
You should need to make one small PCB.
On one side solder female mini-micro USB connector (according to device-charger shape), or you can solder multiple types, and on other side solder wire with male mini-micro USB connector and that goes to phone or device. In middle on PCB use ACS712-05 Hall sensor for measuring current.
With this you measure current will minimal impact on circuit, because this Hall sensor have minimal resistance, which is better then low cost unimer which have 0,1R inside, which have high impact on measured values. Reading of ACS712 can be done using voltmeter or with additional circuit which use uC 7-seg/LCD display and showing current in mA or A. Or you can use analog instrument.
This PCB-small and cheap device can be used later for measuring currents of other devices like navigation, tablets,....
Dont worry just bring one of your transformeless design, and say them to firmly hold device when testing.
I wish you luck on interview.
yes you must have a mobile so that you measure current. if there is no load , no path for current to flow so no current if no load. see attached picture for further infomation. I hope you will get your answer View attachment 89675
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yes you must have a mobile so that you measure current. if there is no load , no path for current to flow so no current if no load. see attached picture for further infomation. I hope you will get your answer View attachment 89675
Hello, if I know the ratings on my charger and battery, is there a formula to get current flowing? Thank you so much.
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