This circuit is from a 90s American documentation. The circuit can use complementary pairs according to the power. The power voltage can be between 5 and 12 V.
This second-order filter was found in American documentation and can be applied to almost any...
This circuit generates the sound of bells. We found it in a 1977 Radio Shack publication. The...
The circuit shown in the figure can be used to detect the operation of infrared sources whose...