We found this range of LEDs with the UAA180 in the 1976 Siemens Integrated Circuits manual. The maximum supply voltage is 18 V.
This circuit was obtained in a Motorola manual, but it applies to almost any operational...
Found in a 1970 EEE this circuit emulates a zener diode whose voltage can be set to R2. Power...
This circuit different from the timer was found in an English publication from 1978. The circuit uses...