This circuit takes advantage of the noise generated at the reverse biased junction of a germanium diode. Other types of diodes can be used. The signal is weak.
This is the power supply circuit for the amplifier in the previous circuit. The source is...
Two LEDs are used in this TTL circuit. Frequency is given by C1 and C2. Power supply must be a 5 V...
This driver for coaxial cables was found in American documentation from the 1980s. The maximum...