This simple circuit is a continuity test that, in addition to testing resistors, can also test other components. Power is provided by batteries and the LED can be of any color.
The CMOS 4046 integrated circuit is not very common today, consisting of a very efficient PLL for...
Using 18 or 24 MHz crystals, this circuit is intended for producing reference signals with...
The sampling and retention circuit shown in the figure uses the LM108. In this circuit we have two MOS...