Despite being from a 1969 publication, the transistors used have current equivalents such as BC548 and BC558. The circuit generates signals from 1 500 to 20 000 Hz and 4 scales.
The components used in this 80's circuit are uncommon today. The circuit is intended for...
This experimental flip-flip changes its state by the command of two push-buttons. The state is...
This circuit was obtained from a 1986 Spanish magazine Resistor. The magazine no longer exists, but...