This National Semiconductor circuit uses integrated circuits that are uncommon today. The circuit was obtained in a 90s documentation.
This is the diagram of a Japanese commercial radio from the 1960s. The circuit uses germanium...
This circuit controls a heating element using a triac. Triac must be fitted with a heat sink. We...
This circuit generates signals in the range of 50 kHz to 1 MHz with a rectangular waveform. The...