Found in General Electric's documentation from 1970, this circuit is indicated for the so-called “Solid State Lamp” (SSL). The LED symbol in the original diagram is inverted.
The traditional circuit was taken from a French magazine Radio Plans that no longer exists but can...
This monostable circuit, from a 1977 Radio Shack documentation, uses a 7400. The time is given by the...
The circuit shown in the figure activates a small indicator lamp that will start to flash when the...