Burst generator (CB21067E)

Found in American documentation from the 90s, this circuit generates sound bursts according to the digital control.

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Triangular Oscillator (CB18943E)
This circuit generates a linear triangular signal whose frequency is determined by C1. Transistors...
T Bridge Audio Oscillator (CB4689E)
This circuit is from an ancient American documentation. The T-Bridge circuit determines the...
TTL Flasher 7400 (CB479)
Two LEDs are used in this TTL circuit. Frequency is given by C1 and C2. Power supply must be a 5 V...