Instructions

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Fig. 3.92: Circuit 92 –
LED fireworks
Fig. 3.93: Circuit 93:
Fast LED flash
Circuit 92: The functioning principle is described on page 248.
Circuits 93 and 94: The time-delayed feedback from the output (collector T2) to the input (base T1) to elec-
trolytic capacitor C2 ensures that T2 briefly turns on at regular intervals.