Found in a 1948 MIT documentation, this circuit uses a 0 to 100 uA microammeter as an indicator. The power supply is 150 V.
The circuit shown is from Motorola's Linear Databook published in 1990. As the CI is uncommon...
We found this circuit in a 1997 documentation. It can be used in any common 12 V source and has...
Using a CA3059 this circuit was found in the July 1995 Electronics Now magazine. The triac must be...