Found in a 90s R-E Experimenters Handbook, this circuit amplifies signals from 100 Hz to 3 MHz. The circuit has a gain of approximately 30 dB. Bipolar transistors are general-purpose types.
This circuit was found in an Elektor from the 90s. Next to the circuit we have a table with the...
This conventional LED flasher circuit has a configurable multivibrator configuration with PNP...
This 1969 Popular Electronics circuit was based on the then recently released BC109, today with...