This circuit is intended for use with common oscilloscopes having been found in documentation on instrumentation from the 1970s. The capacitors are of the ceramic type with low parasitic inductance.
This circuit with only one transistor was obtained in an old English documentation and can be...
This circuit uses a transistor as noise source and a 741 IC as amplifier, sourcing a high...
This circuit uses an LED (called SSL) to regulate current in a configuration with complementary...