This circuit simulates the effect of an inductance. Equivalent operational amplifiers can be used, and the power supply must be symmetrical. The circuit is from a 90's Poptronics.
This common crystal oscillator configuration can generate signals from 1 to 20 MHz, depending on...
This burglar alarm is highly efficient, depending of course on the care with which it is...
This light relay is powered directly by the power grid by activating a 110 V relay. The LDR is of...