2n2222

Hi all, I've build the astable multivibrator with 2N2222 transistors. As you'll find many examples of on internet. All works, but I'm still wondering why it won't start oscillating after cold start. I've read other threads and they mention for example "Since no two devices are identical, one...

I am on my second and more advanced version of an energy stick for my elementary level science electronics class. The first version is working well. I have provided a schematic. I want to use this circuit with two 2N2222s to switch an IRLZ44 that will turn on a 9-12V LED powered by a Lipo 3.7V...