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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.
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Fig. 3.109: Circuit 109 – Constant current source 5.7 mA
Fig. 3.110: Circuit 110 –
Hawaiian guitar
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