I built this circuit on a breadboard with a 2N3906 PNP transistor, a 10V 3300 uf capacitor and tested it. Immediately the LED turns on and stays on. I don't know why this happens as a PNP transistor is only supposed to to turn on when the base is grounded. The function of this circuit is that the LED is on until the PNP transistor sees that the capacitor is below a threshold. Then the transistor should switch to charge the capacitor and quickly turn off. Could I please have some advice on why this happens? Thanks in advance.
