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.
This small power supply is suitable for powering devices using 9V batteries. The circuit uses...
Found in a 90s Silicon Chip documentation, this circuit provides a current of 3 A and the voltages...
This sensor triggers an oscillator emitting sound when a magnet is approached by a reed switch....