2N2222A NPN transistor as Current Amplifier

[erashish14]

Hi All,

I'm using 0.9V to 5V DC DC booster module with Female USB module as output, now when I'm connecting +ive(5V) of USB module with base of 2N2222A NPN transistor via 500 ohm resistor & -ive to emitter, also +ive of Load with collector of transistor & -ive of Load to emitter of transistor & trying to use transistor as current amplifier but I'm not getting any output while checking with multimeter,
Kindly suggest if there is any changes in connection required, to make transistor works as a current booster

 

[Papabravo]

Words are failing you. Schematic diagram please.

 

[Lightium]

Your abbreviations are fictitious and only proper schematics are the language of electronics around these parts.

 

[aliarifat794]

Check all of your connections. There may be a loose connection or short circuit.

 

[Pommie]

Where is the 0.9V coming from, what amperage is available at 0.9V. What current does the relay require?

Mike.

 

[rjenkinsgb]

also +ive of Load with collector of transistor & -ive of Load to emitter of transistor

The load negative should be to the collector, and the load positive to +5V

With the connections you describe, the load is never getting any power to it.

 

[Pommie]

I suspect this is another circuit that will turn 1mA into several Amps from a tiny 9V (@1mA) source.

Mike.

 

[Lightium]

If I may ask a question here, what is +ive?

 

[Nigel Goodwin]

If I may ask a question here, what is +ive?

I'll doubt you'll get an answer, but it seeks pretty obvious he meant positive (+ve), perhaps to do with his native language?.

 

[Tony Stewart]

You are only amplifying the base current to emitter and not boosting the available max current from USB.
This is not what you expected because it cannot boost the max USB current available. Instead you may have fried your base-emitter diode which has a smaller current limit. This is a failed concept.