transistors based analog flip flop electronic suite

This is Analog Flip Flop Electronic Suite which built based on 2 transistors work as switch. This is very easy made and very cheap circuit. You can use this circuit as “the first project” for your students.

Replace the Resistor 10K with variable resistor 20K or replace the electrolytic capacitor 100uF with other value for change the frequency of LED’s flash.