Found in Electronic Design, this circuit with the 555 has the extended times by using the transistor in the timing network.
This traditional configuration from a simple 12 V source is from a 1977 publication. The...
The circuit is suitable for small animations, with the movement effect of the LEDs in a matrix...
This circuit is from the National Semiconductor 1977 FET Databook. The FET can be BF245 or MPF102...