With this circuit it is possible to measure RF signals with a common multimeter. Signals up to 200 MHz can be detected. The diode supports general-purpose equivalents.
This filter was found in Radio Electronics, and its configuration can be applied to any...
We show in the figure how to implement the No-AND or NAND logic function using a general-purpose transistor....
This circuit was found in an English publication from 1974, but it can still be easily assembled using...