5v Regulator - Still having problems

[poogiecat]

Ok, this is the third 5v regulator that I've tried and I'm still having no luck getting it to be 5v!

I'm now using Texas Instruments' regulators. I have been using two 3.0v cr123s. When I test the voltage, I get 6.6v, connected to the regulator it's 6.0v not 5.0v. I noticed that there are 3.7v cr123's ... should I be using two 3.7v instead of two 3.0v? I thought perhaps this is why the regulator is not bringing it down to 5.0v.

 

[Marctwo]

Which TI regulators? PTR08060W by any chance?

The 3V cells should be fine although I've only used 3.7V cells.

What value resistor are you using for the adjust? Are you sure you're taking it from V- and not Vin or Vout?

 

[Fairlane64]

Ok, this is the third 5v regulator that I've tried and I'm still having no luck getting it to be 5v!

I'm now using Texas Instruments' regulators. I have been using two 3.0v cr123s. When I test the voltage, I get 6.6v, connected to the regulator it's 6.0v not 5.0v. I noticed that there are 3.7v cr123's ... should I be using two 3.7v instead of two 3.0v? I thought perhaps this is why the regulator is not bringing it down to 5.0v.

I know this may sound crazy, but have you tested your Voltmeter against a known voltage / powersupply, like maybe a computer power supply or USB port? I'm wondering if your Voltmeter isn't approx. 1 volt out of calibration.

Like Marctwo said, it would be helpful to post which regulator you're using, and maybe even a sketch of the circuit you are currently using.

 

[poogiecat]

Which TI regulators? PTR08060W by any chance?

The 3V cells should be fine although I've only used 3.7V cells.

What value resistor are you using for the adjust? Are you sure you're taking it from V- and not Vin or Vout?

The TI regulator I'm using is: UCC383TDKTTT-5G3. I'm not sure what you mean by "value resistor".

 

[ejoker]

i use the regs from madvapes, just finished wiring one up with 2 14500 3.7s, and end up with 5.1v at the atty. i would say either your wiring is incorrect, you got bad regs or a out of sync meter.

 

[j0ker]

See if this is how you have it setup.

 

[Marctwo]

The TI regulator I'm using is: UCC383TDKTTT-5G3. I'm not sure what you mean by "value resistor".

Ignore me. I was just fishing in the wrong stream.