How to connect a trimmer capacitor

[macnl]

i am trying to connect a trimmer capacitor on breadboard. but the trimmer has three pins. I know that two of the pins are connected together. does that mean I can choose one of the two connected pins as one plate of the capacitor and left the other pin as floating?
the trimmer looks like this:
**broken link removed**

 

[Grossel]

Say you number the pins so that the nearest (on the picture) is pin 2, the rightmost pin is number 1 and the most further is 3.

The capasitance between 2 (middle pin) and 3 will increase when you screw it clockwise. I think the capasitance between 1 and 3 will be constant.

 

[ericgibbs]

i am trying to connect a trimmer capacitor on breadboard. but the trimmer has three pins. I know that two of the pins are connected together. does that mean I can choose one of the two connected pins as one plate of the capacitor and left the other pin as floating?
the trimmer looks like this:
**broken link removed**

Yes to your question.

The trimmer has a continous rotation, watch the trimmer vanes as you adjust the capacitance
when using a 'non metallic' trimming tool.

Old plastic knitting needles filed down to a blade, make a cheap tool.

 

[Boncuk]

It has three pins for better mechanical stability. Since it is adjustable it could twist lose on a PCB having just two pins.

 

[Roff]

I followed the links from the properties of the picture you posted and found these datasheets:
**broken link removed**
**broken link removed**
They clearly show the pin connections for two different size trimmers.

 

[rahulan999]

I haven't tried inserting a trimmer on to a breadboard. I usually use extra wires with the legs to easily insert into the breadboard.

 

[audioguru]

A breadboad has more capacitance between all its connections than the trimmer capacitor.
The trimmer capacitor is used in high frequency RF circuits where a breadbard doesn't work and should not be used. Use a pcb.

 

[gauravkalra]

why breadboard should not be used for trimmer capacitors

 

[audioguru]

why breadboard should not be used for trimmer capacitors

Read post #7.

 

[karaapak]

ıf you couldn t make it worked on the breadbord why you are thinking rf don t works on the breadboard. ı made ıt and ıt works try to make a simple fm transmitter on the breadbord (with a patiance) you will see soon either work or not.

 

[mdanh2002]

ıf you couldn t make it worked on the breadbord why you are thinking rf don t works on the breadboard. ı made ıt and ıt works try to make a simple fm transmitter on the breadbord (with a patiance) you will see soon either work or not.

Why can't you type in proper English? And you just revive a 1-year old thread!!!

 

[Roff]

Why can't you type in proper English? And you just revive a 1-year old thread!!!

Do you think karaapak's first language is English?

 

[mdanh2002]

Do you think karaapak's first language is English?

I think it's not hard to at least spell properly.

 

[karaapak]

no

no, english isn't my mother tongue but also you may write something wrong I think it is important to get the message of the conversation. Also I am greatful for your attention to your language I'm sorry for my mistakes