Page 49 - Electronics Starter Kit_EN

Until C2 gets fully charged C1 will be empty, C2 connected to the base of TR2, so this capacitor
will make the transistor (TR2) in the saturation mode and Blue LED will light up, at the same
time C1 will recharge, it will get the positive side through R1 and will get the negative side
through TR2, and so on.

Note:
If you want to change the time of flashing, there are two ways:
1- Changing R1 and R2 to a bigger value so the time of flashing will be longer, and vice versa.
2- Changing C1 and C2 to a bigger value so the time of flashing will be longer, and vice versa.
You can change them individually, for example you can change only R1 or C1 and you will get a
different time for each LED.

11.6 Example Picture

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