This indicator with the integrated circuits CA3162E and 3161E was published in the July 1990 issue of Radio Electronics magazine. The circuit can be used as a basis for 3-digit projects.
This 1 kHz oscillator uses a Norton LM3900 operating system. The frequency depends on C1 and R1...
This configuration was found in a 1990s documentation. Modern operational amplifiers can be used...
This voltage regulator from STMicroelectronics provides a 1,2 A current in the voltage range from...