Hi to all you knowledgeable techs out there,, My problem is that i need to replace a faulty potentiometer which is the "sender unit" to a digital numeric display.
The faulty unit which is 1k ohm conductive plastic , has (or had) a 22-16 tantalum capacitor bridging two of the three terminals, and i am unsure which two !!!!!,, .Also, since i read that these caps are polarity sensitive, i would need to know which terminal to connect the pos side to.
The input voltage to the display unit is 12 vdc, and the three output terminals (to the sender unit) have the following voltages present.
(1) centre (wiper ?) to one side of resistance track = 2.1 vdc.
(2) centre to other side of track = 0 volts.
(3) across both ends of resistance track = 2.8 volts.
Having spoken to a pal who is an electrician with limited electronic knowledge, he thinks the capacitor is purely a means of "smoothing" the signal, and possibly not essential, however i would prefer to have it in circuit if i can find the answer to this post, thankyou for your help.
The faulty unit which is 1k ohm conductive plastic , has (or had) a 22-16 tantalum capacitor bridging two of the three terminals, and i am unsure which two !!!!!,, .Also, since i read that these caps are polarity sensitive, i would need to know which terminal to connect the pos side to.
The input voltage to the display unit is 12 vdc, and the three output terminals (to the sender unit) have the following voltages present.
(1) centre (wiper ?) to one side of resistance track = 2.1 vdc.
(2) centre to other side of track = 0 volts.
(3) across both ends of resistance track = 2.8 volts.
Having spoken to a pal who is an electrician with limited electronic knowledge, he thinks the capacitor is purely a means of "smoothing" the signal, and possibly not essential, however i would prefer to have it in circuit if i can find the answer to this post, thankyou for your help.