This circuit generates a sinusoidal signal with only -80 dB THD. The circuit was found in a 90's EDN. The frequency is 25 kHz and the components used are from that time.
This circuit was found in a 1980s American documentation. Operational amplifiers are from that...
Pressing S1 by a moment L1 glows up, remaining by a time interval depending on C1. This time...
This circuit causes a bicolor LED or two LEDs of different colors to alternately flash at a...