2 Transistor LED Flasher Circuit
Components List:
R1 = 10M ohm
R2 = 1K – 100K ohm
R3 = 470 ohm
C1 = 0.47uF – 10uF/25V
D1 = 1N914
Q1 = 2N3904
Q2 = 2N3906
Led = High Brightness Red LED
Component values aren’t significant, attempt anything else first from the junkbox.Obviously, the 470 ohm resistor (R3) determines the LED’s brightness and limits the current flow to around 20mA. R3 value of 390 ohm can also be implemented as a save value.
