This analog telephone line extension circuit monitors when the line is in use. We found it in the November 1996 Electronics Now magazine.
Found in a 90s Electronic Design, this circuit operates with Maxim components of the time. The...
This circuit can be used both as a power source and as a battery charger. The resistor R1 serves as...
This circuit uses a unijunction transistor in a different configuration to generate rectangular pulses at...