Question

How to wire the circuit on breadboard from pin 2 to the the middle of resister 10k ?? i forgot what the wire of the meddle of the resister mean and how to wire it on breadborad ?

10 k R1 Output 2 PLLs .8 k Pulse generster 88 p NE 564 :0 2-22 p 001 MHz plode Figure 2. Circuit diagram of a fast capacitance meter using the NE564 phase lock loop

Answer 1

It's a variable resistor called POTENTIOMETER. Potentiometers have three terminals and a cylindrical knob which is rotated to cause variable resistance between the middle and extreme terminal.

Central terminal of POTENTIOMETER is connected to R1. 1st or 3rd terminal can be connected to 5V and ground.