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CODE_PRACTICE_OSCILLATOR_I

2016-08-30 06:06  
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CODE_PRACTICE_OSCILLATOR_I
Q1, a unijunction transistor, generates a sawtooth of about 1.5 to 2 kHz, depending on C1 and R1. Q2 acts as a speaker driver. A 9-V battery is used, and the keying is done by keying the supply line.