Pulse generator with delay 555 (CB8922E)

We found this circuit in a Hands On Electronics from the 90s. The delay is given by the formulas next to the diagram.

Beep For Flasher (CB4340E)
This circuit adds a beep to turn on with car flashers that do not have this feature. A 47 ohm to...
TTL Oscillator (CB15741E)
Depending on the value of C1, this oscillator can produce signals of up to 1 MHz. For a capacitor of 10...
Hearing Aid Amplifier (CB18574E)
This commercial circuit, sold under the designation H531 in Japan in the 1960s, used three...