This circuit can be used to test crystals from 1 to 20 MHz and also has an output to measure their frequency. We found it in the November 1998 Electronics Now magazine.
Found in old American documentation, this circuit is current as it uses the 555 to modulate an...
This audio amplifier uses 3 transistor in a traditional configuration named complementary output....
The UM3562 integrated circuit is a dedicated circuit found in many toys because it generates three types...