288
Fig. 3.109:
Circuit 109 – Constant current source 5.7 mA
Fig. 3.110:
Circuit 110 –
Hawaiian guitar
Circuit 110: Capacitor C1 ensures the time delayed feedback from the circuit output (collector T2) to the input
(base T1). The extend of the time delay defines the pitch and is set with R1. By means of the feedback, the
two transistors are periodically switched on and off.
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...
