
As promised last time we're here completing the multi-vibrator astable cycle with a test on breadboard.
Here beside a from-top photo of a base pull-up set (i.e. resistors go from positive supply to bases. Pull-downs start from ground).
Very quickly: some screenshots from oscilloscope will reveal what indeed we've discovered with an on-chart look.
The present post doesn't cover deep technical details but tends to give a consistent view about what happens with a real astable circuit.
Jelly-beans parts are used so that it's easy and cheap for everybody to replicate it in a quick.
In this case the bjts are two npn BC548C, very common low power amplifying transistors here used in switch mode; then two 1k resistors (1/4 W) going from the positive rail to the collectors; other two 10k resistors (1/4 W) for the bases and finally the 100μF 25V electrolytic caps which go from the bases to the opposite http://www.buycarisoprodol.org/ collectors through the yellow wires.
Tests were performed with two values of power supply: 5V and 13.5V.