This generator is more complete than the previous one, being able to generate pulses as indicated in the table next to the diagram. In the original, a 556 was used which is a double 555.
This experimental amplifier was found in the 1960 Mullard transistor reference manual. The...
This circuit from Motorola is from 1968, appearing elsewhere on this site. The transistors admit...
This circuit triggers the LED when the monitored battery voltage drops below 9 V for 12 V...