This circuit makes use of a transconductance operational amplifier from the 90s. Formula for the calculation of the components is given next to the diagram.
The CMOS 4046 integrated circuit is not very common today, consisting of a very efficient PLL for...
This configuration with complementary transistors causes an LED to flash at a frequency that is...
This circuit was found in a 1968 documentation. It makes use of both NO and NC reed-switches and small...