Found in a 90s Popular Electronics, this circuit can power a miniature railroad with voltages of 15 V and currents up to 1 A. The circuit has soft start effects.
Found in an old documentation about neon lamps, this circuit has the frequency basically...
This simple standing waveform (ROE or SWR) meter is used to adjust antenna matching with...
This is the traditional configuration of a high-pass filter with an operational amplifier, such as...