This 1 A circuit was found in a Philips documentation from 1966. The transistor is of the time, but a modern transistor of equivalent power can be used.
This amplifier for FM antenna signals was published in Radio Electronics magazine in May 1963....
The time the output is high (1) of a TLCSSB in the astable configuration depends on Ra and C. The...
This circuit uses common diodes as sensors, triggering when the temperature rises by touch,...