This circuit uses sunrise and sunset as a synchronization signal. The circuit is from Electronics Now magazine from May 1999. The cycle is one pulse per week.
This sensitive Japanese mid-wave receiver from the 1960s has an output power of 45 mW and is...
This basic TTL watch and minute clock circuit was found in European documentation from the 1970s....
This circuit uses a pickup coil to take the signal from a telephone line without contacts. The circuit...