This 1 kHz circuit was found in American documentation from the 90s. The original operational amplifier consists of a double 741 at the time. The power supply must be symmetrical.
Lumileds LUXEON Infrared LEDs can be purchased from Mouser Electronics in a wide selection of...
This circuit can be used to set the compass for walks or exercises, being small enough to be...
This circuit was found in American documentation from the 1980s. The integrated circuit used is a...