This is one of the many versions of this type of indicator that the reader can find on our website. This is from Mullard's 1969 documentation. The indicator is 95 uA (100 uA).
Found in a 90’s Radio Electronics, this circuit uses a component from the time, difficult to find today....
This circuit was found ina 90s Popular Electronics. It is intended for switching analog video...
We found this alarm circuit in a Radio Electronics magazine from July 1990. The power transistor must be...