Depending on the components, given in the table, this circuit can amplify signals of 100 MHz or 400 MHz. The circuit is from a 80's documentation. Equivalent transistor can be used.
In a bistable circuit, as shown in the figure, we use two sensors. When one of them is touched, the...
This is a second circuit that we found in a French documentation from 1981. See the previous...
This multivibrator circuit uses only one gate and its frequency is controlled by the crystal. The...