Single LED blinker with blitz effect. No need to explain. Ordinary RC positive feedback 2 low power transistors like 2T3308 and 2T3511 a zener diode if higher voltqges are being used and a LED. Simple, works immediately and is educational about feedbacks and RC circuits. Imma build it nowadays. Its should work from 3V to 10,15v or any voltage for that matter because its zener regulated. For higher voltages medium power transistors should be used like 2T6551
