Found in a Popular Electronics from the 90s, this circuit generates signals from 2 Hz to 30 kHz in different bands. The circuit can be powered by voltages from 5 to 12 V, depending on the application.
This is a circuit from the time when some still called the transistor a crystal triode. It...
This circuit, suggested by General Electric, increases the sensitivity of a common multimeter to 1 M /...
This indicator, shown in the figure and suggested by National Semiconductor, causes an LED to...