Regulator design help.

[redtick]

I found this design for a pot controlled alternator regulator on the web, I've built a breadboard to test but not having the results I need.

First, LM348 were sent in place of my order for LM741 so I found the datasheets for the pin-outs and made the changes in the circuit. My understanding is they function the same just a 4 on 1 chip.

The tests show that the pot will vary the voltage to pin 2 (max of 6.2 volts) but the output at pin 1 stays steady at battery voltage.  

Are there any obvious mistakes in the design?? I'm a monkey playing with fireworks doing this type of work.

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[Opera House]

"The tests show that the pot will vary the voltage to pin 2 (max of 6.2 volts) but the output at pin 1 stays steady at battery voltage. "

If the voltage does not go well beyond 6.2V, that may be your problem.  Make the sense resistor to + slightly smaller.

[DamonHD]

It would be a lot easier to follow if you kept ground at the bottom and +ve at the top, like boring convention!

Rgds

Damon

[commanda]

The tests show that the pot will vary the voltage to pin 2 (max of 6.2 volts) but the output at pin 1 stays steady at battery voltage. 

The pot needs to take pin 2 above & below pin 3 to make the output change states.
Check that pin 3 coming from the zener is 6.2 volts.
Then adjust the resistors either end of the pot so the pot adjustment range takes pin 2 above & below pin 3.

This is with the battery at its fully charged voltage, possibly 14.2 volts.