Microammeter (T465E)

Found in a 1948 MIT documentation, this circuit uses a 0 to 100 uA microammeter as an indicator. The power supply is 150 V.

5V x 5 A Switching Regulator LT1074 (CB4402E)
The circuit presented is from the 1997 LinearTechnology Applications. The circuit uses components of...
Cascading unijunction divider (CB6821E)
Found in a 1965 Electronic Design, this circuit divides the frequency of a cascaded signal using...
Call Oscillator (CB16356E)
This very simple audio oscillator can be used as a call device for intercoms or even as an audible...