This circuit was found in a documentation of the 80s, having didactic purpose. For R1 values between 10k to 1M can be used. Transistors are general purpose types.
In this circuit the capacitor under test is charged at switch position A and then discharged...
Found in a Motorola manual from the 1980s, this circuit uses components from the era. The circuit...
This high-gain amplifier was found in the March 1994 issue of Electronics Now magazine. The...