This circuit with power MOSFETs was found in a 1980s Siliconix documentation. Equivalent MOSFETs can be used, as well as other transistors. Note the symmetric power supply.
In the figure we show how to use an LM324 as a voltage comparator the reference voltage is...
This circuit, from an old ON Semiconductor publication, suggests a shield to excite an LED from an...
This signal multiplexer circuit for early low-frequency oscilloscopes was found in the May 1977...