This circuit oscillates in the fifth harmonic of the crystal frequency. The circuit is from a 90's documentation. L1 must be according to the desired frequency.
What sets this circuit apart from the previous one is the use of only one push button. The circuit...
The filter shown in the figure, using only an operational amplifier, is characterized by allowing 1...
This circuit controls the brightness of incandescent lamps up to 400 W for the TIC226 series...