# Pressing Question on Astable Multibrator circuit

Discussion in 'Homework Help' started by Talkwisdom, Apr 3, 2016.

1. ### Talkwisdom Thread Starter New Member

Mar 2, 2016
6
0
Hello All,
I appreciate everyone here.
Attached is the built circuit.
Now the questions are as follows;
1.Measure VB,VC,and VCE of the two NPN each cycle.

2.Calculate IC=(VCC-VC)/RC for each cycle.

Sincerly,i do not know how to read/test components in the circuti,hence the need for your assistance.

How do i place my meter probe on the attached built circuit to get VB,VC, VCE, VCC and RC?

Your swift response will greatly be appreciated.

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2. ### Jony130 AAC Fanatic!

Feb 17, 2009
3,993
1,116
Because this circuit is a oscillator you need a oscilloscope to measure the voltage across the component.
But you can try use your ordinary DC multimeter. Simply connect the "black probe" to better negative terminal (transistor emitter) and use the "red probe" to measure all the voltage in the circuit.

3. ### WBahn Moderator

Mar 31, 2012
18,088
4,917
You want people to tell you where to connect your probes to measure specific things and all you give us is a picture of a bunch of components without any way to tell how they are connected. Does that seem reasonable to you?

4. ### shteii01 AAC Fanatic!

Feb 19, 2010
3,507
512
To explain what WBahn is trying to tell you. Your picture shows the parts. Your picture does not show how those parts are connected. The picture is useless.

5. ### GopherT AAC Fanatic!

Nov 23, 2012
6,320
4,044
I assume that, since toy have 4 resistors, 2 transistors and 2 capacitors, and 2 LEDs and you called it an astable multivibrator, I assume your circuit looks like this. Correct me if I me wrong. Your resistor and capacitor values are obviously different.

Once we have that nailed down, we'll move on.