Help connecting potentiometer

[shubham123]

I am making a project I am not really sure how to connect the potentiometer.Main aim is to vary the voltage.
I connected the -ve end of the battery to one of the ends of the pot, +ve end of the battery to the other end of the pot,-ve of multimeter to -ve of battery, +ve of mutimeter to the middle point of the pot and I got a perfect reading.
But doing the same in the circuit but it did not work.

Have to connect the pot with Vbb in the given diagram.
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[pebe]

This is all to do with the posting on your previous thread, and so you should have continued in that thread - not started a new one.

However, you won't get much base current from a 1.5V source through a 200K resistor. So wire the pot as you suggested but connect a 220ohm resistor between its slider and the base of the transistor. You will then be able to get up to 5mA base current.

Then [u]measure the base voltage directly on the base.[/u]

[shubham123]

Sorry for starting a new thread.I have attached new readings in my previous post(viewtopic.php?f=1&t=5491).I had connected the transistor and pot wrongly.Please let me know if the readings are correct.
Thanks a lot for helping me out.