This interesting circuit for SMD assembly appeared in the November 1987 issue of Radio Electronics magazine. The phonons are generated by selected resistors that are fitted to the assembly.
This filter is suggested by the Texas Instruments Linear Circuits Applications, 1986 edition. The...
With each touch on S1, an output of 4017 is activated, this in sequence 3, 2, 4, etc. These...
This inverter for 230V (220V) loads was found in the 2021 Internet documentation and is based on...