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 circuit is from a 1975 magazine, but it is still current as all components are common. Use...
We found this circuit in a French technical documentation from 1982. The circuit is still current, as...
Lumileds LUXEON Infrared LEDs can be purchased from Mouser Electronics in a wide selection of...