248
Fig. 3.15:
Circuit 15: Threshold voltage yellow LED
Fig. 3.16:
Circuit 16: Threshold voltage infrared diode
Fig. 3.17:
Circuit 17:
Awesome double
turn signal
Function of the Circuits 17 and 18: The two transistors T1 and T2 are switching each other on or off with a
time delay. This is caused by the collector potential of T2 that controls the base current of T1 to C1 and vice
versa, the collector potential of T1 which controls the base current of T2 to C2. The values of C1 and R3 or of
C2 and R4 define the time delay and thus the oscillating frequency.
Summary of Contents for ELECTRONICS EXPERIMENTS BOX
Page 4: ......
Page 265: ...267 Fig 3 56 Cir cuit 56 Audio limiter Fig 3 57 Circuit 57 Amplifier for a storm detector...
Page 269: ...271 Fig 3 64 Circuit 64 Stabilizer for 1 9 V Fig 3 65 Circuit 65 Stabilizer for 2 5 V...
Page 275: ...277 Fig 3 80 Circuit 80 Quiztimer 30 seconds Fig 3 81 Circuit 81 Handy diode tester...
Page 315: ...317 Fig 3 179 Circuit 179 HF generator 150 kHz Fig 3 180 Circuit 180 HF generator 420 kHz...
