HOw to run this trimmer in a series.

[Hell-Fire]

How do you run this type of resistor in series?

The middle leg is the leg where the "hot" wire will be soldered...as in coming from the voltage regulator. I then want to put another resistor in series with it to give me 200K-ohms.

Both resistors are the exactlly the same.

http://www.radioshack.com/images/ProductCatalog/ProductImage/271/271-284.jpg

EDIT

I am thinking after looking at a guide MMouse wrote, that I would connect the hot wire from the regulator to the middle leg of the VR (the middle leg being the wiper), then connect a wire from the ground leg of the first VR to the HOT leg of the 2nd VR, then from the ground leg of the 2nd VR to a ground point.

Sound about right?

[Hell-Fire]

bump

[Hell-Fire]

I figured that was the case, but another question.

Individually I have them set up to turn counter-clockwise to increase resistance, and clockwise to lower it. That still aplies even when connected in series correct. Can still turn em both clockwise to lower resistance?

[`schr0et]

Hell, use a MM to measure mid leg + one of the outer leg, cut the leg which gives ya the lowerreading when you turn your trimmer to the max.

Do the same with the other trimmer. Then solder mid leg of one trimmer to outer leg of other trimmer, repeat if you have more than two.

Just be sure to measure with MM before + after you solder to make sure its coming out nice and even :)

[`schr0et]

Originally posted by Hell-Fire
I figured that was the case, but another question.

Individually I have them set up to turn counter-clockwise to increase resistance, and clockwise to lower it. That still aplies even when connected in series correct. Can still turn em both clockwise to lower resistance?

Yes, but set both trimmers to max resistance, leave one always at max resistance and use the other trimmer to change the resistance to the mod.

That way you'll have a I guess a "stabilizer" and a more accurate opt (my new term :) Ohms Per Turn)

[Hell-Fire]

Thanks for the guidance guys.

So, what I did was a wire to the bottom leg of the lead VR (this wire goes to voltage regulator), then soldered a wire from the top leg to the bottom leg of the 2nd VR, then solder a wire to the top leg of the 2nd to a ground point.

On this VR, there are 2 legs at the top that are side-by-side, and one at the bottom. I figured the bottom leg was the 'middle' leg for all intensive purposes.

When testing the resistance by placing the red probe on the wire that would go to the volt regulator and black probe on the wire that would go to ground, I got 202.5K-ohms. I am guessing I measured that right as what would be the point of taking a resistance reading on either leg that has the wire that connects the 2 VRs together.

[`schr0et]

Originally posted by Hell-Fire
Thanks for the guidance guys.

So, what I did was a wire to the bottom leg of the lead VR (this wire goes to voltage regulator), then soldered a wire from the top leg to the bottom leg of the 2nd VR, then solder a wire to the top leg of the 2nd to a ground point.

On this VR, there are 2 legs at the top that are side-by-side, and one at the bottom. I figured the bottom leg was the 'middle' leg for all intensive purposes.

When testing the resistance by placing the red probe on the wire that would go to the volt regulator and black probe on the wire that would go to ground, I got 202.5K-ohms. I am guessing I measured that right as what would be the point of taking a resistance reading on either leg that has the wire that connects the 2 VRs together.

Yup the differences between choosing the top or bottom leg is usually around +/-2%